Heliothrips Haemorrhoidalis Research Articles

Taxonomic review and illustrated key to identify species of Thysanoptera in subfamily Panchaetothripinae (Thripidae) from the Philippines

The paper provides a review of 16 species in 12 genera under subfamily Panchaetothripinae (Thysanoptera: Thripidae) from the Philippines including new host plant records for Selenothrips rubrocinctus (Giard). Identification keys to genus and species were developed using morphology-based diagnostics of adult female thrips. Photomicrographs of female, and male thrips when available are provided. Reviewed and redefined are the morphological characteristics of Astrothrips aucubae Kurosawa, Astrothrips globiceps (Karny), Astrothrips tumiceps Karny, Caliothrips striatopterus (Kobus), Copidothrips octarticulatus (Schmutz), Elixothrips brevisetis (Bagnall), Helionothrips annosus Wang, Helionothrips guttatus Reyes, Helionothrips kodaliphilus (Ramakrishna & Margabandhu), Heliothrips haemorrhoidalis (Bouche), Hemingia glandula Reyes, Panchaetothrips stepheni Reyes, Phibalothrips peringueyi (Faure), Retithrips javanicus Karny, Rhipiphorothrips pulchellus Morgan, and Selenothrips rubrocinctus (Giard). Species identity confirmation using molecular techniques is recommended for the three species of Helionothrips Bagnall. All 16 species of thrips infest crop plants, fruit trees, grasses, and ornamentals. Caliothrips striatopterus (Kobus), Heliothrips haemorrhoidalis (Bouche), and Selenothrips rubrocinctus (Giard) are pests of mangosteen, and other high value crops in the Philippines.

Silicon compounds promotes physiological response of avocado 'Hass’ and affect the development of pests

The use of silicon (Si) can minimize the adverse effects of abiotic stresses, increase resistance against arthropod pests, and promote growth in fruit crops. Considering the beneficial effects of Si reported in various crops and the limited information on its effect on avocado, this study investigated the effects of the application of two sources of Si (acidic and alkaline) on the physiology, growth, and population dynamics of arthropod pests of 'Hass’ avocado plants. Three experiments were carried out at three different plant development stages: seedlings (Fresno, Tolima), young (Bituima, Cundinamarca), and adult trees (El Tablazo, Tolima). The treatments were as follows:1) plants without Si application (control), 2) plants with foliar application of acidic Si, 3) plants with foliar application of basic Si, and 4) plants with foliar treatment of acidic and basic Si and pyrethrins. Foliar applications of Si caused less accumulation of adult arthropod pests such as Heliothrips haemorrhoidalis, Monalonion velezangeli, Polyphagotarsonemus latus, Bombacoccus aguacatae, Paraleyrodes sp., and Oligonychus yothersi compared to the control treatment. Foliar applications of Si (both sources) also increased plant height and shoot length. Si had a positive effect on leaf stomatal conductance, chlorophyll content, and plant hydraulic conductivity at the end of the three experiments. The results obtained allow us to conclude that the use of Si can be considered a complementary tool in the management of some arthropod pests in avocados. In addition, Si may help in the management of avocado crops by improving the physiological responses of plants at different developmental stages.

Effects of phosphine (ECO2FUME®) on ‘Hass’ avocado fruit quality and target pest mortality

ABSTRACT Phosphine (PH3) is a methyl bromide alternative with the potential to control surface pests of New Zealand avocados as a pre-export disinfestation treatment. ‘Hass’ avocado fruit were treated with PH3 (as ECO2FUME® (2% PH3, 98% CO2 (w/w); Cytec Industries Inc.)). at 500, 750 and 1,500 ppm for 24, 48 and 72 h at 5–6 °C, along with vials containing mould mites (Tyrophagus communis) and greenhouse thrips (Heliothrips haemorrhoidalis). Fruit were then stored at 5 °C for three weeks, external quality assessed, and internal fruit quality assessed after ripening at 20 °C. PH3 treatments had no impact on external fruit quality, nor on skin colouration, and only minor increase in softening compared to control at 24 h, but not 48 or 72 h. Complete (100%) mortality was achieved for thrips at all PH3 concentrations for 48 h. However, only ∼50% mould mite mortality was achieved at the highest PH3 concentration of 1,500 ppm for 72 h; although this treatment did provide a significant reduction in rots and internal disorders. This initial study demonstrates that longer-duration treatments and higher PH3 concentrations improves fruit quality compared with controls, mainly by reducing rots. These treatments fully controlled thrips but provided only partial control of mould mites.

Update on the establishment of Thripoctenus javae in New Zealand and new locality records in Bay of Plenty kiwifruit orchards

The larval parasitoid, Thripoctenus javae (Hymenoptera: Eulopidae), was introduced into New Zealand in 2001 as a biological control agent for greenhouse thrips, Heliothrips haemorrhoidalis. We have re-evaluated the establishment of T. javae at the release sites from Kerikeri to Gisborne and surveyed kiwifruit orchards in the Bay of Plenty to determine how widespread the parasitoid has become. Release sites were surveyed in autumn 2017 for greenhouse thrips. Foliage samples were collected from numerous host plants, where greenhouse thrips were found, and the number of T. javae pupae on each leaf were recorded. In 2018, a second survey for T. javae was conducted in Bay of Plenty; samples of cryptomeria (Cryptomeria japonica) shelterbelt foliage were collected from 65 kiwifruit orchards. Foliage samples were washed and pupae of T. javae were counted. Thripoctenus javae were recorded at 80% of the original release sites from Kerikeri to Gisborne. The parasitoid was found at all sites in Whangarei and Bay of Plenty, 50% of sites in Kerikeri, 33% of revisited sites in Gisborne as well as the single site in Auckland. No host populations of greenhouse thrips were found at four release sites (Kerikeri =2 and Gisborne =2). In Bay of Plenty, T. javae were found at 32 kiwifruit orchards (49% of the total surveyed). All of these orchards are new locality records for T. javae. The furthest distance T. javae was found from a release site was 55.4 km. The introduction of T. javae into New Zealand has been successful with the parasitoid recorded at 80% of the original release sites after 17 years. Dispersal is evident in the Bay of Plenty where we have detected T. javae at 32 new locations on kiwifruit orchards.

Thermal requirements and estimates of the annual number of generations of Heliothrips haemorrhoidalis in strawberry-producing regions of Brazil

Thermal requirements and estimates of the annual number of generations of Heliothrips haemorrhoidalis in strawberry-producing regions of Brazil

Population Dynamics of Heliothrips haemorrhoidalis (Thysanoptera: Thripidae) in Strawberry Cultivars in Southern Brazil.

Heliothrips haemorrhoidalis is a polyphagous thrips species that has been reported as a potential pest in strawberry cultivation in Brazil. Since it has only recently emerged as a pest species in production areas, understanding seasonal trends in the species' activity is particularly important for designing management strategies. Therefore, this study aims to investigate the influence of climate factors (temperature and relative humidity) and six strawberry cultivars ('Albion', 'Aromas', 'Camino Real', 'Monterey', 'Portola', and 'San Andreas') on the population dynamics of H. haemorrhoidalis during the 2018-2019 and 2019-2020 growing seasons in southern Brazil. The greatest peak in thrips populations in the cultivars assessed occurred between January and March (summer) in both growing seasons. The relationship between the incidence of H. haemorrhoidalis and temperature was observed to be negative during the autumn, spring, and summer months but positive during winter. Relative humidity levels above 70% had a negative influence on the abundance of insects. Populations of H. haemorrhoidalis varied between the cultivars as follows: 'Aromas' > 'Monterey' > 'San Andreas' > 'Albion' > 'Camino Real' > 'Portola'. Cross-sections of strawberry leaves showed that 'Monterey' had the highest density of nonglandular trichomes/mm2 (7.26), while 'Portola' cultivar, the greatest predominance of glandular trichomes/mm2 (12.67), which may have contributed to the incidence of H. haemorrhoidalis. The demographic information presented on H. haemorrhoidalis in strawberry cultivars provides a starting point to better understand the insect's population dynamics. These results also indicate that climatic conditions are a limiting factor for the development of H. haemorrhoidalis.

Dynamics of the number of grape thrips (Drepanothrips reuteri Uzel.) in grape agrocenoses of the Southern Black Sea region of Ukraine

Goal. To study population dynamics of grape thrips (Drepanothrips reuteri Uzel.) and determine the factors influencing the increase in the number and harmfulness in grape agrocenoses of the southern Black Sea region of Ukraine.
 Methods. Field surveys of vine plantations and counts of the number of pests were carried out according to generally accepted methods during 2017—2020 in conditions of research farms SE «EF Suvorov’s» and SE «EF Tairove» NSC «V.Ye. Tairov Institute of Viticulture and Winemaking».
 Results. It was found that in the conditions of the southern Black Sea zone of Ukraine there is an increase in the species composition and area of sucking phytophages in grape agrocenoses, especially some species of thrips. Among herbivorous thrips, species characteristic of this zone grape (Drepanothrips reuteri Uzel.) and tobacco (Thrips tabaci Lind.), several more harmful species appeared: variegated (Frankliniella intonsa Trybom), yellow (Thrips flavus Schrank), nightshade (Thrips fuscipennis Haliday), pear (Taeniothrips inconsequens Usel) and greenhouse (Heliothrips haemorrhoidalis Bouche). The number of thrips on grape leaves during the growing season is low — 0.3—4.8 motile individuals per 100 cm2 of leaf surface (corresponding to one average leaf), but the difference between susceptible and tolerant varieties can be traced even with a small presence of thrips. The highest degree of infestation and leaf damage was recorded in grape varieties without pubescence or with weakly pubescending leaves.
 Conclusions. Based on the results of the long-term (2017—2020) monitoring of the phytosanitary state of industrial grape plantations in the southern Black Sea region, it has been established that Thrips (Thysanoptera) occupy an important place among pests, the most common are grape thrips (Drepanothrips reuteri Uzel.), The mass development of which occurs every year during the flowering period of grapes. Research has established that the varietal composition of grape plantations and features climatic conditions of the southern Black Sea coast of Ukraine are favorable for overwintering, development, distribution and accumulation of numbers grape thrips and other sucking pests. It makes you spend constant monitoring, determination of biophenology in order to develop effective methods of regulating their quantity and harmfulness.

Phenology of greenhouse thrips (Heliothrips haemorrhoidalis) on kiwifruit vines, shelter trees and alternative host plants

The greenhouse thrips, Heliothrips haemorrhoidalis is a quarantine pest of kiwifruit. There is a need for reliable information on its phenology in kiwifruit orchards to inform the development of new management options. Numbers of larval, pupal and adult greenhouse thrips were counted on leaves of the two main kiwifruit cultivars Actinidia chinensis var. deliciosa (‘Hayward’) at two sites at different times and A. chinensis var. chinensis ‘Zesy002’ at one site. Greenhouse thrips were also counted on leaves of shelter tree species Cryptomeria japonica, and other plants present on kiwifruit orchards, blackberry (Rubus fruticosus s.l.), barberry (Berberis glaucocarpa), and wineberry (Aristotelia serrata) across a number of sites at different times. There was a strong seasonal pattern to the phenology of greenhouse thrips and it was relatively synchronous for all the host plants surveyed. In general, number of greenhouse thrips on foliage increased from January to peak in April or May before declining in late autumn or winter and remaining low until the following January or February. The phenology of greenhouse thrips followed the same seasonal pattern for a variety of host plants found on kiwifruit orchards at sites in the Bay of Plenty across two two-year time periods. Therefore, host species does not appear to be a factor affecting the phenology of thrips. Other, non-host factors such as microclimate may be important drivers of phenology but they require further study. The consistency of the seasonal pattern of relative abundance means that there is a well-defined window to target for thrips management.

Pests of flower-decorative plants in the collections of Polar-Aalpine Botanical garden

The results of long-term entomological observations at nurseries and in the collection greenhouse of PABSI are presented. The species composition of pests in the collections of open and closed ground of flower and ornamental plants in thePolar-AlpineBotanical gardenwas determined. The dominant invertebrates in nurseries are: Deroceras reticulatum Mtill., Eriophyes padi (Nal), Macrosiphum rosae L., Philaenus spumarius L., Gonioctena quinquepunctata F., Gonioctena pallida L., in greenhouses - Brevipalpus obovatus Donn., Neomyzus circumflexus Buckt., Myzodes persicae Sulz., Heliothrips haemorrhoidalis Bouche. Long-term observations of the state of flower and ornamental plants in greenhouses have shown that not only the species composition changes, but also the status of pests. An important role in the formation of the artificial biocenosis of the greenhouse is played by the food preferences of phytophages. Regular surveys revealed the presence of pests on plants of 41 families. The distribution of plants by the degree of pest population depending on the life form is presented. The most actively populated by the species of tree and shrub groups. The presented species composition of pests of flower and ornamental plants of open and closed ground can not be considered definitively studied, since changes in the trophic relationships of pests were noted during the study period.

Methodological aspects related to biological assessment of insectoacaricides on flower cultures of protected ground

Relevance. Analysis of the present range of pesticides that are used in flower orangeries showed critical shortage of allowed pesticides. Now there are no methods for registration testing of insecticides designed to protect flowers in greenhouses. Thus, the purpose of our research is to develop methodological approaches to assessment of abundance of major pests for flower cultures of protected ground and determination of biological effectiveness of new insectoacaricides.Methods. The following phytophages represent flower pests that are predominant in the protected ground: aphids: green peach – Myzus persicae Sulz., melon and cotton – Aphis gossypii Glov., greenhouse-potato – Aulacorthum solani Kalt., potato – Macrosiphum euphorbiae Thom., green rose – Macrosiphum rosae Linn.; whiteflies: greenhouse whitefly – Trialeurodes vaporariorum Wstw., silverleaf whitefly – Bemisia tabaci Genn.; thrips: tobacco – Thrips tabaci Lind., rose – Th. fuscipennis Hal., western flower – Frankliniella occidentalis Perg., heterophagous – F. intonsa Tryb., greenhouse – Heliothrips haemorrhoidalis Bouche; mites: red spider – Tetranychus urticae Koch.; red greenhouse – T. cinnabarinus BoisdResults. Researches related to assessment of abundance of major pests for flower cultures and choosing methods related to determination of biological effectiveness of insectoacaricides were performed in flower orangeries of Leningrad Region on hybrid tea roses Rosa L., chrysnatemums Chrysanthemum L., gerberas Gerbera G. As a result, the algorithm for performing tests related to study of new insectoacaricides on flower cultures in greenhouses is developed. Methodology instructions that we offer for assessment of abundance of major pests for flower cultures of protected ground and determination of biological effectiveness of new insectoacaricides are intended for ensuring the uniform methodological approach to performance of registration tests of modern means to fight against these pests and opportunity for analysis of tests in various agroclimatic areas and obtaining a reasonable general conclusion and findings related to pesticides taking into account international requirements.

First Record of Heliothrips haemorrhoidalis (Thysanoptera: Thripidae) Causing Damage on Greenhouse Strawberries

Heliothrips haemorrhoidalis (Bouche, 1833) (Thysanoptera: Thripidae), the greenhouse thrips, is reported here for the first time damaging strawberry leaves and sepals (Fragaria × ananassa Duch.; Rosaceae) in the world. Two natural enemies were observed preying on the species: Hyaliodocoris insignis (Stal, 1860) (Heteroptera: Miridae) and Orius insidiosus (Say, 1832) (Hemiptera: Anthocoridae). Sumario Heliothrips haemorrhoidalis (Bouche, 1833) (Thysanoptera: Thripidae), o tripes-das-casas-de-vegetacao, e relatado pela primeira vez danificando folhas e sepalas de morangueiro (Duch.; Rosaceae) no mundo. Dois inimigos naturais foram observados predando a especie: Fragaria × ananassa Hyaliodocoris insignis (Stal, 1860) (Heteroptera: Miridae) e Orius insidiosus (Say, 1832) (Hemiptera: Anthocoridae). Key Words: Fragaria × ananassa; greenhouse thrips; leaf damage; natural enemies View this article in BioOne

A new species of Heliothrips (Thysanoptera, Panchaetothripinae),based on morphological and molecular data.

Heliothrips longisensibilis sp. n. is described from the tropical regions of southern China, Yunnan and Hainan, based on morphology and data from mitochondrial and nuclear genes. However, specimens that are identical in colour and structure are reported from northern Brazil, and this is presumably the area of origin of this new species. The area of origin within South America of the Greenhouse Thrips, Heliothrips haemorrhoidalis, is discussed and remains in doubt. An identification key to the four species of Heliothrips is provided.

Greenhouse Thrips, Heliothrips haemorrhoidalis (Bouche)

This thrips was described by Bouché in 1833 from specimens taken from a greenhouse in Europe as Thrips haemorrhoidalis. Packard described this species for the first time from this country in 1870 and called it the greenhouse thrips. This thrips appears in the Common Names of Insects approved by the Entomological Society of America as the greenhouse thrips, Heliothrips haemorrhoidalis (Bouché). This document is EENY-075 (originally published as DPI Entomology Circular No. 64), one of a series of Featured Creatures from the Entomology and Nematology Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published: February 1999. Revised: August 2004.
 EENY075/IN232: Greenhouse Thrips, Heliothrips haemorrhoidalis (Bouche) Insecta: Thysanoptera: Thripidae) (ufl.edu)

Population Abundance, Phenology, Spatial Distribution and a Binominal Sampling Plan forHeliothrips haemorrhoidalis(Thysanoptera: Thripidae) in Avocado

The economic impact of the greenhouse thrips, Heliothrips haemorrhoidalis (Bouche) (Thysanoptera: Thripidae), has increased on Chilean avocados as a consequence of the high value of the crop and the increased injury to the fruit surface. The population dynamics, phenology, and patterns of aggregation of H. haemorrhoidalis was determined with the objective of rationalizing the use of pesticides using a therapeutic control approach. The study was conducted in 2 avocado fields during 2005 to 2007 in the Valparaiso Region of Chile. New colonies developed on the leaves and small fruits, reaching greatest numbers at the beginning of the winter months. Immature stages were greater in number than the adults during most of the production season. The spatial distribution was calculated using Taylor's power law, showing an aggregated pattern with indices of 1.46 and 1.53 on leaves and fruits, respectively. Pooled data were used to describe the relationship between population density and the proportion of infested leaves and fruit. In the case of a density of about 2 thrips per leaf or fruit, the proportion of infested samples was 0.8. Sample size curves were generated as a function of mean density of thrips with about 20 presence/absence samples needed to estimate densities of 0.5 thrips or more at a precision level of 25%.

Leaf Preference of Heliothrips hαemorrhoidαlis (Thysonoptera: Thripidae) on Vιburnum tinus

The leaf preference of larvae, pupae and adults of Heliothrips haemorrhoidalis (Buche) (Thysanoptera: Thripidae), a serious pest of several ornamental plants, were studied on Viburnum tinus. Leaves were sampled for thrips from the base, middle and distal end of viburnum twigs at weekly intervals from April 11 to September 15, 2000. The population of this thrips was observed at high levels of between 10 to 76 thrips per leaf, till the middle of June when it sharply declined to zero, probably due to high temperatures. Higher populations developed on the basal than on the middle leaves. The lowest populations were recorded on the distal leaves. The predator Orius vicinus (Ribaut) (Hemiptera: Anthocoridae) was recorded in low numbers and therefore its effect on thrips populations was considered negligible.

Peculiarities of the brain organization and fine structure in small insects related to miniaturization. 4. Thrips (Thysanoptera, Thripidae)

This article describes the morphology and ultrastructure of the brain of the greenhouse thrips, Heliothrips haemorrhoidalis (Thripidae), studied in a series of histological sections with the use of 3D reconstructions and TEM. The structural peculiarities of the brain organization and its features associated with body miniaturization as well as its quantitative characteristics (the number of cells and the volume of individual centers) are described for the first time in both the adult and the first-instar nymph of H. haemorrhoidalis. It is suggested that the limits of the nervous system miniaturization may be different in holo- and hemimetabolous insects.

The anatomy of the thrips Heliothrips haemorrhoidalis (Thysanoptera, Thripidae) and its specific features caused by miniaturization

A new set of data on the internal and external structure of the adult and larva of the thrips Heliothrips haemorrhoidalis (Bouché, 1833) is presented. The structure of the internal systems of this thrips was revealed using modern methods of 3D computer modelling. The changes in shape and relative size are discussed as an outcome of miniaturization in comparison to the supposed ancestor of this species. The layout of the internal systems of thrips is compared to those of other insects similar in size: beetles of the families Ptiliidae and Corylophidae and wasps of the families Mymaridae and Trichogrammatidae.

Host plants of Panchaetothripinae (Thysanoptera: Terebrantia: Thripidae) in New Zealand

ABSTRACTBased on institutional collections, database records, literature and new field collections, 247 breeding host associations were found in New Zealand for the four species of the subfamily Panchaetothripinae. The endemic Sigmothrips aotearoana bred only on indigenous plants (21 species). The three adventive species, Heliothrips haemorrhoidalis, Hercinothrips bicinctus and Parthenothrips dracaenae, bred on indigenous plants in native ecosystems and on other plants in and outside native ecosystems; 165, 52 and 9 species, respectively. Of the 172 plant genera, only 17 hosted more than one species. Several plant families and orders hosted only one thrips species; notably, S. aotearoana on Orchidaceae and Loganiaceae; Hercinothrips bicinctus on Compositae (Asteraceae) and Solanales; Heliothrips haemorrhoidalis on Cornales, Ericales, Fagales, Malvales, Poales, Pinales, Rosales and Vitales. The robustness and usefulness of the patterns of host plant associations for predicting plant species at risk could be tested by observations in countries with other species of Panchaetothripinae.

No evidence of parthenogenesis‐inducing bacteria involved in Thripoctenus javae thelytoky: an unusual finding in Chalcidoidea

AbstractAll Hymenoptera have a haplodiploid mode of sex determination. Although most species reproduce by arrhenotokous parthenogenesis, there are many thelytokous species, in which unfertilized eggs develop into diploid females. Thelytoky can be genetic or due to microbial infection. In the large Chalcidoidea superfamily, thelytokous parthenogenesis is almost always associated with infection of endosymbionts of the genera Wolbachia, Cardinium, and Rickettsia. Thripoctenus javae (Girault) (Hymenoptera: Eulophidae) is a larval parasitoid of the greenhouse thrips Heliothrips haemorrhoidalis (Bouché) (Thysanoptera: Thripidae), an important worldwide pest. Both the host and its parasitoid reproduce by thelytokous parthenogenesis. The main goal of this study was to test whether endosymbiotic bacteria, either those known to induce thelytokous parthenogenesis or other sex‐manipulators, are responsible for thelytoky of two geographically distinct populations of T. javae. We used sequencing of ribosomal ITS2 and 28S‐D2 and mitochondrial COI genes to molecularly characterize the two populations, antibiotic and heat treatments, and FISH of ovaries, for thelytoky studies. It was impossible to revert thelytokous individuals back to sexual reproduction and no evidence of bacterial infection was found in parthenogenetic T. javae females. This makes T. javae the second chalcidoid in which thelytokous reproduction appears not to be associated with the presence of bacterial endosymbionts.

Distinguishing features of immature stages of Panchaetothripinae (Thysanoptera: Thripidae) known in New Zealand

ABSTRACTDiagnostic morphological characters of the juvenile Panchaetothripinae in New Zealand are illustrated. Keys developed enable colonies with only immature stages to be identified without needing to rear adults. Live larvae or larvae in ethanol are distinguished by the presence of expanded tips of body setae (Parthenothrips dracaenae), the absence of setae at the abdomen tip (Hercinothrips bicinctus), setae at abdomen tip not longer than abdominal tip width (Heliothrips haemorrhoidalis) and abdominal tip setae longer than abdominal tip width (Sigmothrips aotearoana, endemic species). The presence or absence of spine-like setae on abdominal segments 9 and 10, and the number and length of setae on the wing buds, enable identification of pupae. Abdominal spine-like setae were on the prepupa and pupa of H. bicinctus and S. aotearoana, species that pupate off the plant, and are probably defensive structures. This is the first record of spine-like setae on segment 10 of terebrantian pupae.