Pheromone Traps Research Articles

Evaluation of Rice Genotypes Resistance to Yellow Stem Borer, Scirpophaga incertulas (Walker) through Sex Pheromone Trap

Yellow stem borer, Scirpophaga incertulas (Walker) is monophagous insect pest causing serious damage to rice growers of plain regions of Nepal. This study was done to evaluate the host preference of yellow stem borer to the various genotypes of rice. The research design employed was Randomized Complete Block Design (RCBD) with seven treatments and three replications and done in kharif season of 2021. Rice varieties selected were Sabitri, Sarju 52, US 312, Radha 4, Sawa Mansuli, Silki and Hardinath 3, which are popularly cultivated in Kailali. Sex pheromone trap (scirpolure) was installed to monitor the preference of yellow stem borer for various rice varieties, especially at the panicle initiation stage of rice. Statistical analysis of four weeks data of adult male moths trapped on different cultivars of rice revealed that the yellow stem borer adult moths were highly attracted to the US 312 and less attracted to Sarju 52 and Silki varieties. This research implied that the adoption of popular rice variety Sarju 52 could safeguard the farmers from the notorious pest i.e. yellow stem borer of rice.

Development and validation of integrated pest management modules against spotted pod borer Maruca vitrata Fabricius on garden bean Lablab purpureus var. typicus (L.)

To reduce the detrimental effect of insecticides, an effective Integrated Pest Management (IPM) module is necessary for the eco-friendly management of Maruca vitrata in garden bean ecosystem. Two field trials were carried out to evaluate the efficacy of different insecticides and botanicals against M. vitrata on Lablab purpureus var. typicus. Two seasons field evaluation of insecticides revealed that chlorantraniliprole 18.5 SC was the most effective treatment to control the pest recorded 0.11 and 0.36 larva/plant in two seasons, respectively after two rounds of spray followed by flubendiamide 20 WG (0.46 and 0.92 larva/ plant) and emamectin benzoate 5 SG (0.50 and 0.95 larva/plant). Among botanicals tested, commercial neem formulation and 5% Ageratina adenophora recorded the least larval count of 1.64 & 1.05 larva/plant and 2.24 & 1.45 larva/plant in two seasons, respectively. IPM modules were developed with three effective insecticides (chlorantraniliprole 18.5 SC, flubendiamide 20 WG and emamectin benzoate 5 SG), two effective botanicals (commercial neem formulation 1500 ppm and 5% A. adenophora) along with the pheromone trap for validation. All the IPM modules were equally effective in managing M. vitrata population on L. purpureus and recorded a significantly (at 5 %) lower larval population than the farmer’s practice. The residues of chlorantraniliprole, flubendiamide and emamectin benzoate reached below the detectable level at the time of harvest. The population reduction of predatory coccinellids and spiders was also lower in IPM modules than in farmer’s practice. An increased benefit cost (1.95 to 1.99) ratio was observed in IPM modules.

Reliability of Pheromone Trap Catches and Maize Plant Damage as Criteria for Timing Fall Armyworm Control Interventions in Humid Forest Agroecology of Central Africa.

Control of fall armyworm (FAW) Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) since its invasion of Africa still depends on pesticides. Early detection of adults is considered the key to the success of larvae control in the crop field. However, FAW control thresholds based on current monitoring techniques are not well established in Africa. We investigated the efficacy of moth capture frequencies and FAW incidence levels as decision tools for FAW management. Experiments were conducted over two maize cropping seasons during which FAW incidence, severity, and larvae count were recorded during destructive sampling after the application of a homologated insecticide. During the first season, the FAW incidence ranged from 37.5 ± 5.6% in the 25% incidence threshold treatment to 48.1 ± 8.1% in the control. During the second season, the incidence was significantly lower in the 25% incidence threshold treatment (55.8 ± 5.7%) compared with the control (75.7 ± 3.0%). Over the two seasons, no significant difference in FAW damage severity was recorded between the treatments and control. The highest number of larvae per plant (4.0 ± 0.6) was observed in the 10% incidence threshold treatment. Insecticide application did not consistently contribute to reducing FAW incidence and observed plant damage did not translate into yield loss. FAW control needs further investigation to establish a threshold above which damage translates into yield loss, thus necessitating control intervention.

Influence of Temperature Variability on Survival and Development of Citrus Leaf Miner, Phyllocnistis citrella Stainton (Lepidoptera: Gracilariidae) in Tanzania

Due to limited information on Phyllocnistis citrella’s Biology, study was aimed to examine the effects of different temperature levels on biology of citrus leaf miner under controlled laboratory conditions at the Entomology laboratory of Sokoine University of Agriculture (SUA), Tanzania from December 2011 to September 2012. Leaf samples (1,985 leaf samples) considered to contain larvae in serpentine mines were collected and individually incubated at room temperature. The emerging adults were wet preserved in 70% ethanol while some dry preserved using special micro pins under microscope for future identification. A Monterey LG8920 pheromone trap was set in every 10m2 at SUA citrus orchard to trap adult moths to supplement sample sources. Citrus leaf miners species collected were identified and four different temperature levels (20, 25, 30 and 35°C) were monitored at each developmental stage. Results revealed longer development time (egg to adult) at 200C and shorter at 300C in 28 and 10 days while the total mortality was 26.67% at 200C and 6.67% at 300C respectively. Oviposition period and rate were negatively and positively influenced by temperature (from 9.26 days at 200C to 6.21 days at 300C and 15.2 eggs/ female/ day at 300C and 6.8 eggs/ female/ day at 200C respectively). The overall fecundity was 28.2 eggs/ female at 200C and 57.1 eggs/ female at 300C. High larval mortality rate was recorded compared to the egg stage while no mortality observed at pupa stage. Conclusively, the pest on this temperature range (200C, minimum to 300C, maximum) has high fecundity, low mortality rate and the developmental time was positively correlated with high temperature, therefore considered optimum temperature range for its survival and development. Other researches especially Integrated Pest management are imperative for sound management package as per the pest in Tanzania and beyond.

Helicoverpa genus on the edge of the continental U.S.: Flight phenology, analysis of hybrid presence, and insecticide performance in high-input field crops in Puerto Rico.

The genus Helicoverpa includes several agricultural pests globally. Helicoverpa armigera was reported in several countries in South America in 2013, and in Puerto Rico, in 2014. This territory is considered an agricultural hub, with a high-input system of seed production in the southern region of the island, and also at the edge of the continental U.S. Possible natural dispersion of populations of H. armigera from the Caribbean or other Central American regions poses a continuing risk to the U.S. This study was performed during the post-detection scenario of H. armigera in Puerto Rico, from 2018 to 2021. A year-round pheromone trapping program of adult males indicated an increase in the population from October to March and differences in the occurrence of Helicoverpa spp. between the municipalities Juan Diaz and Salinas. The proportion of H. armigera/H. zea and detection of congeneric hybrids between these species were assessed based on genital morphology and DNA analysis. Interestingly, neither H. armigera nor expected hybrids were detected in the present study. The susceptibility of H. zea populations to the insecticides Spinetoram, Emamectin benzoate, Chlorantraniliprole, and Esfenvalerate was assessed, and an overall significant effect of insecticide susceptibility was detected. Chlorantraniliprole and Emamectin benzoate had the highest efficacy. These results contribute to the Integrated Pest Management and Insect resistance management programs to Helicoverpa spp. in Puerto Rico. In addition, provide validated information to be considered in mitigation plans, in the scenario of an invasion of H. armigera in the continental U.S.

Determination of Tropinota hirta (Poda) (Coleoptera: Cetoniidae) Caught in Different Traps Feeding on Almond (Prunus amygdalus Linnaeus) Flowers

Almond (Prunus amygdalus Linnaeus) is very beneficial for human health in terms of high oil, calcium and other mineral substances it contains. It is consumed as fresh almonds, dried nuts, and roasted almonds (with or without salt), as well as in the food industry in the confectionery, chocolate and pastry industries, almond oil, cosmetics and pharmaceutical industries, and also as animal feed because its green peel contains sugar. One of the factors that negatively affect production in almond cultivation is plant protection factors. One of these factors is Tropinota hirta (Poda) (Coleoptera: Cetoniidae). In many parts of the world, it causes damage by feeding on the flowers of the trees in commercial almond orchards and is considered as an economically important pest because it causes product losses. In this study, it was carried out to determine the trapping of T. hirta, which is harmful in almond orchards in Mardin province, has an important potential and economic importance in almond production, in different types of traps. The studies were carried out in a garden with at least 100-150 trees at weekly intervals between February and May in 2018. In the experiments, funnel, basin, bucket and sticky plate-shaped pheromone and blue-colored trap types without pheromones were studied. As a result of 13 counts made in 8 different traps, 4 with pheromone and 4 without pheromone, 6,518 T. hirta were caught. In the experiments, it was determined that in terms of the number of traps of T. hirta in both pheromone and non-pheromone traps, the most in funnel-type traps, followed by washtub, water bearer and blue-colored sticky sheet traps. The first emergence of the pest into nature was the beginning of the phenological flowering of almond trees on March 01, when the daily air temperature was 8-10 °C on average. In the period between the second week of March and the second week of April, where the average daily temperature is between 13-15 °C and the average daily humidity was between 40-60% in the gardens, the population density of the pest was at maximum levels and it only fed on flowers during this period. It was determined that the population density of the pest started to decrease rapidly with the end of the flowering period and ended in the third week of May.

Do pheromone traps help to reduce new attacks of Ips typographus at the local scale after a sanitary cut?

The spruce bark beetle, Ips typographus, is causing severe economic losses during epidemic phases triggered by droughts and/or windstorms. Sanitation felling and salvage logging are usually the most recommended strategies to limit the damages. However, any additional control method to limit the economic impact of an outbreak would be welcome. In this respect, the efficiency of pheromone trapping is still controversial or poorly documented. In this 2-year study (2020–2021), at the peak of a severe outbreak in Belgium, we quantified the wood volume and presence/absence of new attacks at 126 sites attacked during the previous year and within 100 m from the initial attack. Each site was randomly allocated to one of three treatments: (1) three crosstraps baited with pheromones, (2) one tree-trap baited with pheromones and treated with an insecticide and (3) control sites with no trapping device. The attacked trees of the previous year were all cut and removed before the start of the experiment and newly attacked trees were removed as they were detected. The trapping devices were only active during spring to target overwintering bark beetles that might have escaped the sanitation cuts and to limit the risk of attracting dispersing beetles from outside the patch during the summer. We found a strong decrease of the attacks relative to the previous year in all treatments, including the controls (more than 50% of the control sites had no new attacks). There was no relationship between the new attacks and the attacks of the previous year. In both years, new attacks were more frequent (presence/absence) in sites with crosstraps (95% Confidence Interval [56–84%] of the sites with new attacks) than in sites with a tree-trap (26–57% - p = 0.02) and to a lesser extent than in control sites (32–63%, p = 0.08). In 2020, the attacked volumes were slightly higher in sites with crosstraps (95% Confidence Interval [3.4–14.2 m³]) than in control sites (0.2–3.5 m³, p = 0.04) and no significant difference was found with tree-trap sites (1.1–6.2 m³, p = 0.38). In 2021, there were no significant differences between the volumes attacked in the control sites (1.8–9.4 m³), crosstraps sites (0.9–6.4 m³) and tree-trap sites (0–2.5 m³). Overall, we found no evidence in favor of the efficacy of pheromone trapping during spring to reduce economic damages at the local scale when combined with sanitation felling and during a severe outbreak. The use of baited crosstraps could even be hazardous as it seemed to increase the occurrence of new attacks probably by attracting bark beetles but failing to neutralize them.

Integrated management of thrips-mite and borer complex attacking chilli

Thrips, mite and borer complex are the most serious insect pests which reduce chilli yield remarkably in many chilli growing areas. This study exposed that sustainable bio-rational based management packages including different mechanical approaches and bio-pesticides were effective against Thrips, mite and borer pests in chilli. The results indicated that, spraying of Sodium lauryl ether sulphate (Fizimite) and Matrine (Biotrin) along with blue sticky trap and pheromone mass trapping of Helicoverpa armigera and Spodoptera litura was most effective against Thrips, mites and borer pests. The lowest number of Thrips and fruit borer infestation was observed from spraying of Sodium lauryl ether sulphate (Fizimite) and Matrine (Biotrin) along with blue sticky trap and pheromone mass trapping of Helicoverpa armigera and Spodoptera litura treated plots. The highest yield (20.93 t/ha) and net income (145525 Tk/ha) were also obtained from spraying of Sodium lauryl ether sulphate (Fizimite) and Matrine (Biotrin) along with blue sticky trap and pheromone mass trapping of Helicoverpa armigera and Spodoptera litura treated plots. Only application of chemical insecticides is not effective against the insect pest’s population in a long-term. In contrast, mechanical approaches such as sticky trap, pheromone trap as well as different bio-pesticides are environmental, economical, dependable and that facilitate the Integrated Pest Management (IPM) concept.

Population Development and Determination of Infestation Rate of Greenhose Tomato Pests in Karatay and Meram (Konya) Districts

The study was carried out during the 2018-2019 growing season under greenhouse conditions to determine the population development and infestation rates of Thrips, Leafhopper species, and Tuta absoluta damaging greenhouse tomatoes in Karatay and Meram (Konya) districts. For this purpose, 10 greenhouses of tomato were selected from the two districts. Delta-type sexual pheromone trap, blue and yellow sticky traps were hung in each greenhouse. The traps were placed in the greenhouses alongside tomato seedlings. The pests caught in these traps were counted weekly and recorded. The infestation rate of 25 plants was selected randomly from each greenhouse and their pest infestation was examined. As a result of this study, Thrips species in the districts were found in the early stage of the plant in blue traps and were recorded to be 29 and7 pests per week in Karatay and Meram respectively. Leaf hooppers species emerged in yellow sticky traps during the last stages of plant phenology; and in 2018-2019, a maximum of 5-4 pests per week was determined, respectively. Tuta absoluta, on the other hand, had a high population at the end of the season; in 2018-2019, a maximum of 636-571 adult pests per week were caught oon the traps, respectively. In 2018-2019, whereas the infestation rate of Thrips and Leafhopper species were 0%, the infestation rate of T. absoluta was 18.66% and 18.76%, respectively.

Survey of overwintering Halyomorpha halys (Hemiptera: Pentatomidae) in ports of export and natural landscapes surrounding the ports in Republic of Korea.

Halyomorpha halys (Hemiptera: Pentatomidae), an important agricultural and nuisance pest, is highly invasive with peculiar hiding behavior in human-made structures for overwintering. To evaluate the contamination risk of overwintering H. halys in non-agricultural export goods, we conducted a two-year field survey in Republic of Korea to locate overwintering H. halys in two major ports of export, Ulsan and Pyeongtaek ports, and monitored both active and overwintering H. halys population levels with varying distances from the ports ranging from 1 km to 48 km. First, we deployed wooden shelters in the two ports to catch dispersing H. halys for overwintering and conducted visual inspections for human-made structures in the ports to locate overwintering H. halys. In addition, we sampled dead trees to find overwintering H. halys in wooded areas. Second, we monitored active H. halys populations using pheromone traps with varying distances from the ports. From the survey of overwintering populations, no H. halys was collected from wooden shelters deployed in the two ports. However, we found four adults overwintering in human-made structures in Pyeongtaek port in the first year of survey. One dead adult was also found from a dead tree located in a wooded area adjacent to Pyeongtaek port in the second year. For active populations, results of pheromone trapping indicated that H. halys populations were present during autumn dispersal period not only in agricultural areas, but also in wooded areas adjacent to the two ports. This study reports for the first time that overwintering H. halys were found from the inside the port of export in its native areas with a low density. The results were discussed for evaluating contamination risk of overwintering H. halys in export goods shipping from the Republic of Korea.

Moth sex pheromones affect interspecific competition among sympatric species and possibly population distribution by modulating pre-mating behavior.

Premating behaviors mediated by pheromones play pivotal roles in animal mating choices. In natural populations of the striped stem borer Chilo suppressalis and the rice leaf roller Cnaphalocrocis medinalis in the rice field habitat, we discovered that Z11-16:Ald, a major component of the C. suppressalis pheromone, modulated the premating behavior of C. medinalis. Z11-16:Ald evoked a strong olfactory response in male antennae and strongly inhibited the sex pheromone trapping of male C. medinalis in the field. The functions of three C. medinalis sex pheromone receptor genes (CmedPR1-3) were verified through heterologous expression in Xenopus oocytes. CmedPR1 responded to Z11-18:OH and Z11-18:Ald, as well as the interspecific pheromone compound Z11-16:Ac of sympatric species; CmedPR2 responded to Z13-18:OH and Z13-18:Ald, as well as the sex pheromone compounds Z11-16:Ald and Z9-16:Ald of sympatric species; and CmedPR3 responded to Z11-18:OH and Z13-18:OH, as well as the interspecific pheromones Z11-16:OH, Z9-16:Ald, Z11-16:Ac, and Z11-16:Ald of sympatric species. Thus, CmedPR2 and CmedPR3 share the ligand Z11-16:Ald, which is not a component of the C. medinalis sex pheromone. Therefore, the sex pheromones of interspecific species affected the input of neural signals by stimulating the sex pheromone receptors on the antennae of male C. medinalis moths, thereby inhibiting the olfactory responses of the male moths to the sex pheromones. Our results demonstrate chemical communication among sympatric species in the rice field habitat, the recognition of intra- and interspecific sex pheromones by olfactory receptors, and how insect premating behaviors are modulated to possibly affect resource partitioning.

Eco-friendly control method against invasive pest box tree moth, (Cydalima perspectalis (Walker) (Lepidoptera: Crambidae))

BackgroundBuxus sempervirens (Boxwood) is a type of plant that has economic and cultural significance, danger of extinction due to various factors. Cydalima perspectalis (Walker, 1859) (Lepidoptera: Crambidae), an invasive species, has an important role as a boxwood pest. The inadequacy of the pheromone trap methods recommended to control the pest or the negative effects of chemical insecticides on the environment have led to seeking alternative approaches in this regard. In this study, it was conducted to determine whether entomopathogens can be applied in pest control, the insecticidal effects of Bacillus thuringiensis subsp. kenyae (FDP-8), Bacillus cereus (FD-63), Brevibacillus brevis (FD-1) and Vibrio hollisae (FD-70) bacterial strains at the concentration of 1 × 108 CFU/ml and Beauveria bassiana (Bals.-Criv.) Vuill. (Cordycipitaceae) (ET 10) fungal isolate at the concentrations of 1 × 106, 1 × 107 and 1 × 108 conidia/ml were tested under controlled conditions.ResultsAs compared the results of the bacterial strains and fungal tested, it was determined that the best results were obtained from in the fungal isolate at the concentration of 1 × 108 conidia/ml. After 192 and 216 h. of observation, the 1 × 108 CFU/ml of bacterial strains: B. cereus FD-63, B. brevis FD-1 and V. hollisae FD-70; also, 1 × 108 conidia/ml concentration of ET 10 fungal isolate of B. bassiana control C. perspectalis caused mortality rate of 100% under laboratory conditions.ConclusionFuture studies of these microorganisms against this pest in the field, may be an important alternative method to control this pest.

Field evaluation of red palm weevil Rhynchophorus ferrugineus Olivier pheromone lures

The red palm weevil Rhynchophorus ferrugineus Olivier (Coleoptera: Curculionidae) is a key pest of coconut. The efficiency of pheromone lures sourced from three countries along with natural (sugarcane) and synthetic (ethyl acetate) co-attractants, was tested in the infested coconut plantation. The results revealed that synergists and co-attractants are essential to sustain trapping efficiency. The best weevil captures were obtained when the pheromone trap had both the natural food bait (sugarcane) and the synthetic co-attractant (ethyl acetate). Pheromone traps with only ethyl acetate as a co-attractant led to lower captures as compared to pheromone traps with only the food bait (sugarcane). In general, the captures were female dominant with an overall male: female ratio of 1:1.35.

Population Dynamics of Fall Army Worm <i>Spodoptera Frugiperda</i> (J E Smith) on Maize

Population dynamics of the fall army worm (FAW) Spodoptera frugiperdaon maize was carried out at the research field of Tamil Nadu Agricultural University, Coimbatore (kharif and rabi, 2018 and 2019). The results revealed that maximum FAW trap catches were obtained during 34th(7.6 moths/ trap) and 5th(7.8 moths/ trap) standard weeks (SW) of kharif and rabi seasons of 2018, respectively. During 2019, a more or less similar trend was observed with a maximum during 31st(7.2 moth/ trap) and 48th (8.2 moth/ trap) SW of kharif and rabi seasons, respectively. Correlation with weather factors indicated a significant negative correlation with evening relative humidity (RH) and significant positive correlation with morning RH during 2019-20. No significant effect of weather factors was observed during 2018-19 except for a significant positive correlation with evening RH and rainfall. The correlation between larval counts and pheromone trap catches were significantly positive with r-value of 0.55 and an R2value of 0.907 during 2018-19.

Vibrational calling signals improve the efficacy of pheromone traps to capture the brown marmorated stink bug

Halyomorpha halys (Stål, 1855), the brown marmorated stink bug (BMSB), is an invasive species that has become a key agricultural pest in its invaded range. Commercial traps available for BMSB monitoring rely on male produced aggregation pheromones as lure, with two possible shortcomings: trap spillover and low detection precision. In this study, we assessed if vibrational signals can increase the attractiveness of pheromone traps by testing the optimized vibration-based lure (Female Song 2, FS2) associated with a specifically designed trap (i.e., the vibrotrap). We evaluated the efficacy of this bimodal trap (i.e., pheromones + vibrations) on females, males and nymphs in controlled conditions (greenhouse) and in the field, in two sites at the margin of two commercial vineyards. In the field, bimodal vibrotraps were compared to three unimodal (i.e., only pheromone) trap types. Both experiments showed that the vibrotrap is highly attractive for BMSB, and the optimized FS2 signal significantly improved its effectiveness. Even though FS2 was selected to target males, the number of trapped females increased as well. Overall, the presented findings show a feasible improvement to future commercial BMSB traps through the synergic use of semiophysicals and semiochemicals. Further research is needed to evaluate the effectiveness of vibrotraps for both early detection and mass trapping.

Refinement of different combinations of (Brinjal Shoot and Fruit Borer) in Brinjal

BSFB (Brinjal shoot and fruit borer) Lesinoides orbonalis is the most destructive insect for brinjal production. It reduces the value of market price. The experiment comprised eight (8) treatments including one untreated plot. The treatments comprised different rational combinations of mechanical control involving collection and destruction of infested plant parts, use of sex pheromone trap in the centre of the plot and at the canopy level and judicious application of Marshal 20 EC @ 2ml per litter of water based on adult monitoring or routine spray. The treatments differed among themselves in efficacy, and treatment that comprised pheromone trap placed at the plant canopy + mechanical control + spray of Marshal 20 EC @ 2ml per litter of water 2 days interval just from the flowering was adjudged showed significantly lower fruit infestation (different fruiting stage 6.43%, 13.70%, 8.90% respectively) compared to other treatments. Among all the treatment T3 (pheromone trap placed at the plant canopy + mechanical control + spray of Marshal 20 EC @ 2ml per litter of water 2 days interval just from the flowering) was the best option. This treatment also provided the highest benefit cost ratio (2.09) among all the treatments.

INTERACTION OF PINK BOLLWORM (LEPIDOPTERA: GELECHIIDAE) POPULATION LEVELS IN PHEROMONE TRAPS AND WEATHER FACTORS

Pink bollworm (Pectinophora gossypiella) is a destructive pest of agricultural crops especially cotton crop in Pakistan. It has ability to form rosette flowers, bolls and makes them unable to open. Thus it deteriorates cotton seed quality which has significant impact on yield reduction. Increasing trend of insecticides has resulted in insecticide resistance, environmental pollution and risks of human health. Integrated pest management has key role to reduce negative impacts. Besides of several other components, pheromone traps are best monitoring and mass capturing tool for bollworms in agricultural crops. The study was conducted to check relation of pink bollworm mass trapping in pheromone traps relating to environmental factors during three years study 2018 to 2020. Results indicated that pink bollworm has two peak activity periods during study years. Standard weeks (SW) 11 to 15 and 31-35 were highly active while SW 20 to 26 was inactive periods of pink bollworm. Adult moth population captures in pheromone traps was 3.14, 4.41 and 6.75/ trap during 2018, 2019 and 2020, respectively. Highest peaks were 11.12, 11.85, 15.94 /trap with maximum, minimum, average temperatures, relative humidity and rainfall of 29.43: 36.59: 35.28°C, 11.31: 21.36: 22.80°C, 20.37: 28.96: 29.04°C, 54.66: 61.23:58. 36% and 0.00, 0.00, 0.00 mm, during 2018, 2019 and 2020, respectively. Temperature 20- 30°C had significant impacts to speed activities of pink bollworm. Minimum (r= -0.165, -0.144, -0.582) and maximum (r= -0.078, -0.045, -0.192) temperatures had negative and non- significant correlation with population in pheromone traps while average temperature had positive and significant correlation (r= 0.112, 0.290, 0.486) during study years. Average temperature had maximum impact of 20.9 (0.01), 20.7 (0.03) and 9.3 (0.07) % on population variability during 2018, 2019 and 2020, respectively. Population trends of pink bollworm had shown increasing trends during the subsequent years. Pheromone traps proved best monitoring tool of pink bollworm to integrate into integrated pest management strategy.

Obtaining daily catches of the beet armyworm, <i>Spodoptera exigua</i>, by using a sticky pheromone trap equipped with an IoT monitoring camera: verification in a commercial chrysanthemum field

Obtaining daily catches of the beet armyworm, <i>Spodoptera exigua</i>, by using a sticky pheromone trap equipped with an IoT monitoring camera: verification in a commercial chrysanthemum field

Know Your Pests When Trapping Soybean Looper in the Florida Panhandle

Pheromone trapping is a common scouting method used in collaboration with integrated pest management. A major crop pest of many plant species, including Panhandle crops like peanut and cotton, is the soybean looper. A soybean looper pheromone-trapping study performed in Panhandle commercial peanut and cotton fields also attracted other species with similar appearances, sometimes in high numbers. Misidentification would result in overestimation of soybean looper populations and likely unnecessary insecticide applications. The sharp stigma looper, due to its high seasonal abundance and flight pattern similar to that of the soybean looper, was most concerning. This insect is not a pest and can be discerned from the soybean looper easily through its wing markings, if someone knows what to look for, but if these harmless moths were unwittingly thought of as soybean loopers, it could greatly skew population numbers and prompt improper applications of pesticides.

Test The Attraction of Spodoptera exigua Imago To Several Traps on Shallot Crops

The objective of the research was to find the effective traps fro trapping the imago of Spodoptera exigua Hbn. The research was conducted in Dusun Taeno Atas, Rumah Tiga Village, Teluk Ambon District, Central Maluku Regency, from September to December 2020. The study used shallot seeds cv. bauji. The treatments used were exi pheromone trap (PF), yellow trap + exi pheromone (PKF) and yellow trap (PK). The control treatment was without pheromone. The study used a completely randomized design (CRD) with three replications. The results showed that pheromone traps were the most effective for trapping Spodoptera exigua Hbn pests.