Attack Density Research Articles

Position Falsification Detection Approach Using Travel Distance-Based Feature

Abstract This paper addresses the vulnerability of vehicular ad hoc networks (VANETs) to malicious attacks, specifically focusing on position falsification attacks. Detecting misbehaving vehicles in VANETs is challenging due to the dynamic nature of the network topology and vehicle mobility. The paper considers five types (constant attack, constant offset attack, random attack, random offset attack, and eventually stop attack) of position falsification attacks with varying traffic and attack densities, considered the most severe attacks in VANETs. To improve the detection of these attacks, a novel travel distance feature and an enhanced two-stage detection approach are proposed for classifying position falsification attacks in VANETs. The approach involves deploying the misbehavior detection system within roadside units (RSUs) by offloading computational work from vehicles (onboard units, or OBUs) to RSUs. The performance of the proposed approach was evaluated against different classifiers, including a wide range of paradigms (KNN, Decision Tree, and Random Forest), using the VeReMi dataset. Experimental results indicate that the proposed method based on Random Forest achieved an accuracy of 99.9% and an F1-Score of 99.9%, which are better not only than those achieved by KNN and Decision Tree but also than the most recent approaches in the literature survey.

Early impact assessment of the paninvasive polyphagous shot hole borer beetle on commercial pear production

AbstractThe polyphagous shot hole borer (PSHB) beetle, Euwallacea fornicatus (Eichhoff) (Coleoptera: Curculionidae, Scolytinae), and its phytopathogenic fungal symbiont (Fusarium euwallaceae Freeman et al.) threaten commercial and urban tree species worldwide. This pest–fungus complex has been newly discovered in the commercial deciduous fruit industry (Western Cape, South Africa), where its effect is still unknown. This study explored the impact of PSHB infestation on fruit quality and plant water‐use efficiency (WUE) – as indicated by carbon and nitrogen stable isotope ratios – of commercially cultivated Packham's Triumph pear trees within the first year of invasion, as well as changes in phenotypic plasticity (trait expression range). The impact of PSHB infestation is currently most evident in fruit quality traits, with a clear distinction between the control and most densely attacked tree categories. Fruit and leaf traits showed high variation and a significant change in phenotypic plasticity. Increased PSHB attack density was associated with smaller, duller‐toned, sweeter fruit at the time of harvest and data tended towards reduced plant WUE. Producers can expect significant variation in fruit quality and plant WUE even in hosts without branch dieback, visible plant stress or extensive beetle breeding, especially in orchards where infestations persist beyond the first year. These findings necessitate additional research to describe the long‐term impact, examine the threat to other deciduous fruit crops and cultivars and assess the need for adapted management or harvesting methods.

Cutting into short logs reduces infestation by the bark beetle Polygraphus proximus

AbstractPolygraphus proximus Blandford (Coleoptera: Curculionidae: Scolytinae), a non‐aggressive bark beetle, has caused mortality of Abies spp. in Western Siberia, Central Asia, European Russia as well as Japan. Removing dead trees (e.g. salvage logging) and thinning stands are considered one of the best practices to reduce the risk of bark beetle outbreaks. However, salvaging or removing dead and thinned trees requires significant effort. Thus, to determine whether cutting trees into shorter logs would reduce P. proximus infestation, we exposed A. sachalinensis logs of various lengths on the ground in a forest stand. The attack density of P. proximus significantly decreased with shorter log lengths. It can be concluded that cutting into short logs and leaving them on the ground are effective practices to reduce the chance of P. proximus host location and outbreaks after natural disturbances and thinning.

Differential phase of Platypus quercivorus attacks in urban green space: A case study on 2 urban parks in Tokyo

The ambrosia beetle Platypus quercivorus (Maruyama) transmits the pathogenic fungus Raffaelea quercivora Kubono et Shin. Ito, causing Japanese oak wilt and subsequent tree dieback. In recent years, there has been a marked increase in mortality of secondary forests due to Japanese oak wilt, especially in suburban and urban parks, as P. quercivorus finds suitable host trees and environments. To prevent extensive mortality from P. quercivorus attacks, it is crucial to establish effective management strategies for secondary forests. In this study, we aimed to investigate the occurrence patterns of P. quercivorus attacks and identify effective management strategies in urban parks that have experienced recent outbreaks of Japanese oak wilt to find any hints for establishing effective management strategies. Over a two-year period, we surveyed the occurrence of P. quercivorus attacks on Quercus serrata Murray trees along walking trails and assessed surrounding conditions. Through data analysis, we identified significant factors influencing attacks. The results revealed distinct differences in host tree condition and attack severity between parks. Although the proportion of attacked trees in one park markedly increased over the two-year period, the other park remained stable, suggesting different attack phases between parks. In the former park, the occurrence of attacks was positively correlated with tree size, severity of nearby attacks, and nearby tree dieback but negatively correlated with surrounding tree density and occurrences of last year attack. Conversely, in the latter park, only occurrences of last year attack showed a significant negative correlation with attack occurrence. This discrepancy may be attributed to variations in the attack phase of P. quercivorus in each park. From a management perspective, park managers should establish flexible forest management strategies in suburban and urban parks to adapt to different attack phases.

DENSITAS HAMA BIBIT TANAMAN HUTAN DI PERSEMAIAN PERMANEN BPDASHL WAY SEPUTIH WAY SEKAMPUNG LAMPUNG SELATAN

The density of pest attacks in nurseries can interfere with growth and reduce seedling quality and can even cause death and cause economic losses. This study aims to analyze the density of each type of pest in the nursery. Data collection was carried out by direct observation of the sample plot at the BPDASHL Way Seputih Way Sekampung Permanent Nursery, Karang Sari Village, Ketapang District, South Lampung Regency. The sample was determined by Cluster Sampling which was based on the type of tree seed, while the placement of sample plots in each seedling bed used Systematic Sampling. The results showed that there were 19 types of pests that attack forest plant seeds in nurseries including leaf curler caterpillars, armyworms, bagworms, brown moths, wood grasshoppers, stone grasshoppers, green steamed grasshoppers, two-lane grasshoppers, small grasshoppers, dompolan lice, lamtoro lice , metallic blue beetle, red rumex beetle, sitona beetle, triple horn moth, walang sangit, koksi beetle, stem borer and snail. The highest density of pests that attack forest seedlings are wood locusts, stem borer beetles and dompolan lice. Nurseries need to monitor the development of pest populations and maintain a balance of climate and cleanliness of the area around the nursery with appropriate silvicultural measures.

Patterns of Ips cembrae (Herr) infestation on trap and standing trees of European larch (Larix decidua Mill.)

The large larch beetle, Ips cembrae, is a significant pest causing the death of larch. In 2020, the attack density of I. cembrae on larch trap trees and standing trees was evaluated using sample sections placed along the trunk. As a defensive measure against I. cembrae, trap trees were highly effective in both spring and summer. The attack density increased with increasing trap tree surface area/volume. Galleries were established evenly throughout the entire trunk including the thin upper portion. When the number of trap trees was low and their capacity full, a continual aggregation of adults occurred due to pheromone communication, leading to attacks on healthy standing trees in the immediate vicinity. It was found that I. cembrae attacked standing trees from the trunk base, with a continual colonization of the stem up to 70% of the tree height in a time-differentiated progression of development stages. The attack density of I. cembrae on standing trees was up to 40% lower than on the trap trees.

Tree species preference and impact on native species community by the bark beetle Ips amitinus in a recently invaded region

Non-native bark beetle species represent a major threat to forest ecosystems. The bark beetle Ips amitinus has recently expanded its range from Finland into northern Sweden. In the present study, we asked the following questions: (i) What is the distribution status in Sweden? (ii) Is there a difference in preference and reproductive success between Norway spruce and Scots pine? (iii) How common is the species after range expansion and does it influence the native community of bark- and wood-boring beetle species? We established the presence of I. amitinus and co-existence with the native community through checks of logging residues at 382 localities in northern Sweden. In addition, attack densities and reproductive success were compared between spruce and pine through investigating field material and by a no-choice rearing experiment. We found that I. amitinus is distributed over large parts of northern Sweden. Within its distribution area, it was found in 58% of all checked localities. It is one of the most common bark beetle species in logging residues and a higher proportion of Norway spruce objects compared to Scots pine were colonised. Attack density and reproductive success were higher in Norway spruce in field material and in the rearing experiment. There was no significant difference in the number of native bark- and wood-boring beetle taxa between localities where I. amitinus was present or absent.

Successful colonization of novel spruce hosts by European and North American spruce bark beetles can favour trans-Atlantic range expansion

Abstract The European spruce bark beetle Ips typographus and the North American spruce beetle Dendroctonus rufipennis cause high mortality of spruces on their native continents. Both species have been inadvertently transported beyond their native ranges. With similar climates and the presence of congeneric spruce hosts in Europe and North America, there is a risk that one or both bark beetle species become established into the non-native continent. There are many challenges that an introduced population of bark beetles would face, but an important prerequisite for establishment is the presence of suitable host trees. We tested the suitability of non-native versus native hosts by exposing cut bolts of Norway spruce (Picea abies), black spruce (Picea mariana) and white spruce (Picea glauca) to beetle attacks in the field in Norway and Canada. We quantified attack density, brood density and reproductive success of I. typographus and D. rufipennis in the three host species. We found that I. typographus attacked white and black spruce at comparable densities to its native host, Norway spruce, and with similar reproductive success in all three host species. In contrast, D. rufipennis strongly preferred to attack white spruce (a native host) but performed better in the novel Norway spruce host than it did in black spruce, a suboptimal native host. Our results suggest that I. typographus will find abundant and highly suitable hosts in North America, while D. rufipennis in Europe may experience reduced reproductive success in Norway spruce.

Naïve Pine Terpene Response to the Mountain Pine Beetle (Dendroctonus ponderosae) through the Seasons.

Insect herbivores must contend with constitutive and induced plant defenses. The mountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Curculionidae, Scolytinae) has expanded its range east of the Rocky Mountains into the western boreal forest and is encountering evolutionarily naïve lodgepole pines (Pinus contorta) and jack pines (Pinus banksiana). Pinus contorta and P. banksiana in the expanded range have different constitutive and induced defenses in response to wounding and inoculation with fungal associates of D. ponderosae. In the historic range, previous studies have examined phloem terpene content prior to and just after D. ponderosae mass attack, but the terpene profile of attacked trees post-overwintering is unknown. We examined the response of mature P. contorta and P. banksiana trees to experimentally-applied mass attack by D. ponderosae and quantified phloem terpenes at three time points, pre-attack, post-attack (same season), and the following spring, post-overwintering. Phloem content of total terpenes as well as many individual terpenes increased after D. ponderosae attack but were only significantly higher than pre-attack levels at the post-overwintering time point in both P. contorta and P. banksiana. The absence of a significant increase in phloem terpenes in the month following attack in naïve pines is a potential cause for increased D. ponderosae offspring production reported in naïve P. contorta. Beetle attack density did not influence the phloem terpene profiles of either species and there was no significant interaction between attack density and sampling time on terpene content. High phloem terpenes in trees that are attacked at low densities could prime these trees for defense against attacks in the following season but it could also make these trees more apparent to early-foraging beetles and facilitate efficient mass attack at low D. ponderosae population densities in the expanded range.

Detection method to eliminate Sybil attacks in Vehicular Ad-hoc Networks

A Sybil attack is caused by a malicious vehicle node stealing fake identities and continuously generating fake vehicles on the road to create the illusion of congestion, which endangers normal vehicles on the road. Because Sybil vehicle nodes have trajectories and motion states similar to those of normal vehicles, they are more difficult to detect in high-density traffic environments. The real-time authentication of vehicles is impossible in the existing traffic environment; thus, malicious vehicle nodes with a high degree of stealth can continuously attack and are difficult to stop. In this paper, we propose a Sybil attack detection method based on basic security message (BSM) packets, which exploits the characteristic that BSM packets have a unique sending source and uses the spatiotemporal relationship of dynamic vehicle location changes to detect and trace Sybil attacks. A weighted integration strategy is proposed for increasing the detection precision without machine-learning model prediction. Experimental results indicated that the proposed method can detect Sybil attacks in real time and is not affected by the attack density or traffic density. Moreover, it can detect Sybil nodes and trace malicious nodes simultaneously, with precisions of ¿98% and ¿94%, respectively, resolving the difficulties of existing detection schemes.

Padat Populasi Wereng Batang Coklat (Nilaparvata lugens) dan Wereng Hijau (Nephotettix virescens ) pada Tanaman Padi Varietas Inpara 2 di Kampung Bokem Kabupaten Merauke Papua

The purpose of this study was to analyze the population density and intensity of attack of Brown Planthopper (Nilaparvata lugens Stall) and green leafhoppers (Nephotettix virescens) on rice plants of Inpara 2 variety in Bokem Village. The research was conducted from August to October 2022 in the rice fields of Bokem Village, Merauke District. Sampling was carried out on three rice fields with an area of 20 x 40 m divided by five observation sub-plots spread diagonally with a size of 2 x 2 meters. Plant height of Inpara 2 variety at the age of 14 DAP (23.1 cm), 28 DAP (33.2 cm), 42 DAP (53.8 cm), 56 DAP (64 cm) and 70 DAP (70.2 cm) . The number of tillers at the age of 14 days old (3.2 tillers), 28 days old (5.5 tillers), 42 days old (11 tillers) and 56 days old (12.1 tillers). The panicle length of the Inpara 2 rice variety was on average (21.1 cm) while the weight of 1000 grains was 14.7 grams. Brown planthopper population at the age of 14 days after planting (0.19 individuals), 28 days after birth (0.07 individuals), 42 days after birth (0.19 individuals) and 56 days after planting (0.31 individuals) while the green leafhopper population at 14 days old (0.30 individuals) 32 individuals), 28 days old (0.33 individuals), 42 days old (0.25 individuals) and 56 days old (0.01 individuals). Keywords: Pest, Inpara 2, Population, Brown planthopper, green leafhoppers

Mechanical and Durability Evaluation of Metakaolin as Cement Replacement Material in Concrete.

Due to the increasing prices of cement and its harmful effect on the environment, the use of cement has become highly unsustainable in concrete. There is a considerable need for promoting the use of cement replacement materials. This study investigates the effect of variable percentages of metakaolin (MK) on the mechanical and durability performance of concrete. Kaolin clay (KC) was used in the current research to prepare the MK by the calcination process; it was ground in a ball mill to its maximum achievable fineness value of 2550 m2/Kg. Four replacement levels of MK, i.e., 5%, 10%, 15%, and 20% by weight of cement, in addition to control samples, at a constant water-to-cement (w/c) ratio of 0.55 were used. For evaluating the mechanical and durability performance, 27 cubes (6 in. × 6 in. × 6 in.) and 6 cylinders (3.875 in. diameter, 2 in. height) were cast for each mix. These samples were tested for compressive strength under standard conditions and in an acidic environment, in addition to being subjected to water permeability, sorptivity, and water absorption tests. Chemical analysis revealed that MK could be used as pozzolana as per the American Society for Testing and Materials (ASTM C 618:2003). The results demonstrated an increased compressive strength of concrete owing to an increased percentage of MK in the mix with aging. In particular, the concrete having 20% MK after curing under standard conditions exhibited 33.43% higher compressive strength at 90 days as compared to similarly aged control concrete. However, with increasing MK, the workability of concrete decreased drastically. After being subjected to an acid attack (immersing concrete cubes in 2% sulfuric acid solution), the samples exhibited a significant decrease in compressive strength at 90 days in comparison to those without acid attack at the same age. The density of acid attack increased with increasing MK with a maximum corresponding to 5% MK concrete. The current findings suggest that the local MK has the potential to produce good-quality concrete in a normal environment.

The effect of inactivation of aldehyde dehydrogenase on pheromone production by a gut bacterium of an invasive bark beetle, Dendroctonus valens.

Semiochemical-based management strategies are important for controlling bark beetles, such as invasive Red Turpentine Beetle (Denroctonus valens), the causal agent for mass mortality of pine trees (Pinus spp.) in China. It has been previously shown that the pheromone verbenone regulates the attack density of this beetle in a dose-dependent manner and that the gut bacteria of D.valens are involved in verbenone production. However, molecular functional verification of the role of gut bacteria in the pheromone production of D.valens is still lacking. To better understand the molecular function of gut bacterial verbenone production, we chose a facultative anaerobic gut bacterium (Enterobacter xiangfangensis) of D.valens based on its strong ability to convert cis-verbenol to verbenone, as shown in our previous study, and investigated its transcriptomics in the presence or absence of cis-verbenol under anaerobic conditions (simulating the anoxic environment in the beetle's gut). Based on this transcriptome analysis, aldehyde dehydrogenase (ALDH1) was identified as a putative key gene responsible for verbenone production and was knocked-down by homologous recombination to obtain a mutant E.xiangfangensis strain. Our results show that these mutants had significantly decreased the ability to convert the monoterpene precursor to verbenone compared with the wild-type bacteria, indicating that ALDH1 is primarily responsible for verbenone conversion for this bacterium species. These findings provide further mechanistic evidence of bacterially mediated pheromone production by D.valens, add new perspective for functional studies of gut bacteria in general, and may aid the development of new gene silencing-based pest management strategies.

Low-Rate Denial-of-Service Attack Detection: Defense Strategy Based on Spectral Estimation for CV-QKD

Although continuous-variable quantum key distribution (CVQKD) systems have unconditional security in theory, there are still many cyber attacking strategies proposed that exploit the loopholes of hardware devices and algorithms. At present, few studies have focused on attacks using algorithm vulnerabilities. The low-rate denial-of-service (LDoS) attack is precisely an algorithm-loophole based hacking strategy, which attacks by manipulating a channel’s transmittance T. In this paper, we take advantage of the feature that the power spectral density (PSD) of LDoS attacks in low frequency band is higher than normal traffic’s to detect whether there are LDoS attacks. We put forward a detection method based on the Bartlett spectral estimation approach and discuss its feasibility from two aspects, the estimation consistency and the detection accuracy. Our experiment results demonstrate that the method can effectively detect LDoS attacks and maintain the consistency of estimation. In addition, compared with the traditional method based on the wavelet transform and Hurst index estimations, our method has higher detection accuracy and stronger pertinence. We anticipate our method may provide an insight into how to detect an LDoS attack in a CVQKD system.

Characteristics of Lithocarpus edulis tree death caused by Japanese oak wilt

ABSTRACT In the southern part of the Boso Peninsula in Chiba prefecture, Japan, Japanese oak wilt has been spreading since the first dead trees were found in 2017. In this area, primarily Lithocarpus edulis trees died, but the mechanisms by which the ambrosia beetle Platypus quercivorus and the associated fungus Raffaelea quercivora kill L. edulis trees have yet to be clarified. We investigated the relationships among tree trunk diameter, xylem discoloration, and wilt symptoms as well as attack density by the ambrosia beetle. Dead and declining trees increased as the attack densities increased; however, the attack densities were lower than those previously reported in Quercus crispula and Q. serrata. Beetle galleries were distributed mainly in the heartwood. Xylem discoloration caused by R. quercivora expanded throughout the heartwood and into the inner sapwood. At the places where beetle galleries extended to middle parts of the sapwood, the discoloration frequently expanded radially close to the cambium. In the dead and declining trees, the healthy sapwood narrowed at a certain height, above which many parts of xylem were dead and stained dark, suggesting that death of foliage and branches resulted from restriction of water uptake at a particular height. In conclusion, L. edulis trees were killed even at low attack densities and the contribution of P. quercivorus and R. quercivora to the tree death was different from that of other oak species.

CT2‐MDS: Cooperative trust‐aware tolerant misbehaviour detection system for connected and automated vehicles

Connected and automated vehicles (CAVs) are recognized as a promising solution to improve road safety. Before deploying CAVs, securing the communication environment is a critical challenge. To secure the exchanged sensitive messages between CAVs, a novel cooperative trust-aware tolerant misbehaviour detection system (CT2-MDS) is proposed in this paper. The vehicle-to-everything (V2X) network model in real complex scenarios is built first, and several typical types of attacks are simulated. The cooperative trust factor is then defined to evaluate the received message packet's plausibility instead of the node. And the measuring uncertainty of sensors is considered to improve the overall detection precision. At last, a multi-model fusion misbehaviour detection method is presented based on the idea of cross-validation. In this mechanism, different from the binary classification, the misbehaviour messages are categorized into particular misbehaving classes. To verify the proposed system's performance, the simulation is conducted, and the results showed that the proposed method outperformed existing single classifiers and provided good prediction accuracy in different attack density.

Equiprobable and attacked-square chess entropies by phases, levels of play and game outcomes

In any legal chess position, we define an attacked-square entropy [Formula: see text] for either Black or White pieces in terms of the square occupation probability [Formula: see text], where [Formula: see text] is the number of all possible movements to square [Formula: see text] (free or occupied by an opponent’s piece) and [Formula: see text] is the total mobility defined as the sum of all possible movements. Thus, each attacked square contributes to the entropy according to its received “firepower” concentration. A simpler nonsquare-dependant equiprobable entropy [Formula: see text] in terms of equal probabilities [Formula: see text] always yields [Formula: see text]. On average, the difference [Formula: see text] is very large in the Opening phase and [Formula: see text] decreases faster for lower ranked players after move 25. A major cause of the reduction of [Formula: see text] during a game is material loss, which is an irreversible process. By game outcome, gaps in average [Formula: see text] among winners, draws and losers are larger for Amateur players than for Elite players, both in the Middlegame and Endgame. Statistically, Elite players exhibit narrower dispersions in [Formula: see text]. Also, the entropy rates of the Elite level fluctuate much less than the entropies of other levels. Density of attacks in the four-square central zone is very high in the Opening, specially for Elite players.

Virulence of Fungi Isolated from Ambrosia Beetles to Acer amoenum Branches.

In Japan, no association between the ambrosia beetle and their fungal symbionts causing branch dieback or tree mortality on maple, Acer amoenum, has been reported. However, we identified dieback of several branches and numerous holes created by three species of ambrosia beetles, Euwallacea fornicatus, Euwallacea interjectus, and Platypus calamus, on Acer amoenum trees at the University of Tokyo Tanashi Forest, Tokyo Metropolis, Japan, in 2016. The high attack density of the beetles was observed on the weakened trees; however, the contribution of the associated fungi to the branch dieback was still unknown. We isolated fungi carried by these three beetles and inoculated them to Acer amoenum cut main trunks and sapling branches to determine whether the associated fungi caused the branch dieback. Fusarium euwallaceae was isolated from all Euwallacea fornicatus and Euwallacea interjectus, whereas Arthrinium phaeospermum, Raffaelea cyclorhipidia, and Epicoccum nigrum were isolated from P. calamus, with 35, 15, and 5% isolation frequencies, respectively. Inoculation with F. euwallaceae and R. cyclorhipidia induced statistically significantly wider sapwood discoloration (six and four times wider for F. euwallaceae and R. cyclorhipidia, respectively) than the controls, and larger water-conductance loss (2 and 1.7 times larger for F. euwallaceae and R. cyclorhipidia, respectively) than the controls. However, the observed lesions were not large enough to cause discoloration, and symptoms of dieback were not observed, even 13 months after the inoculation. Therefore, we concluded that the virulence of the four investigated fungi to Acer amoenum was very low and that these fungi were likely not the primary cause of the branch dieback.

Efficient defense strategy against spam and phishing email: An evolutionary game model

Spam and phishing emails are never-ending problems, and they are increasingly distributed with the help of the botnet. Existing spam and phishing email defense depends heavily on the spam filtering technique. However, using the spam filtering technique needs many defensive resources, which are usually limited. Therefore, to achieve the maximum effect with limited defense resources, we answer the following questions in this paper: How many user nodes we should protect in a target network? What factors affect this and how? To solve these problems, we propose an evolutional game model between multiple attackers and multiple defenders and analyze the evolution process of their strategies. The optimal number of users protected is first obtained as an efficient defense strategy, which can reduce resource consumption and lower attack density. Then we discover that this defense strategy is affected by the email opening probability of users, the attack cost, and the attack loss. Our results can help email network managers deploy the spam filtering technique according to the email opening probability, of which the defender has an asymmetric information advantage. Furthermore, we study the influences of the attack cost and loss on the defense strategy. It is revealed that the attack cost has a more marked effect on the defense strategy compared to the attack loss. Finally, we experiment on a large real-world dataset of emails sent in 2-year time duration. The defense strategy is proven to be effective for maximizing defense resources.

Species composition of harmful entomocomplex in peach orchards of Southern Ukraine

Studies of the dynamics of changes in the species composition of pests in fruit orchards in the context of climate change became especially relevant. Monitoring of phytophagous insects in gardens with the isolation of dominant species is a key component for building an effective system of protection of perennial plantings. The study was conducted in 2018-2020 on the basis of the Melitopol Experimental Station of Horticulture named after M.F. Sidorenko IS NAAS. The purpose of the study was to establish the species composition of phytophages and the level of their colonisation of peach orchards to optimise measures to protect this crop from pest damage. Conducting route and detailed surveys in different phases of tree development (swelling of buds, pink bud, flowering, end of flowering, forming, growth and ripening of fruits) showed that the entomocenosis of peach orchards consisted of 15 species of phytophagous insects belonging to 4 orders, 10 families, and 2 species of mites. The species composition and level of pest colonisation of peach orchards changed under the influence of weather conditions and protection measures. Lepidoptera insects were represented by 7 species of pests, among which the main carpophages were Grapholitha molesta Busck., to a lesser extent Anarsia lineatella. The attack density of these pests each year was at a high and medium level, respectively. Throughout all the years of study most harmful of insects from the order Coleoptera was polyphagous Epicometis hirta. The main Homoptera pest in 2018 was Quadraspidiotus perniciosus Comst., while the prevalence of other catfacing insects was weak. During the vegetation periods of 2019-2020 the development of insects such as aphids and increase in the colonisation of leaves by mites, Thrips fuscipennis Haliche and Typhlocyba rosae L. was recorded in peach orchards