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Bulletin of Entomological Research

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https://www.readbyqxmd.com/read/28330519/insecticidal-effects-of-extracts-of-humulus-lupulus-hops-l-cones-and-its-principal-component-xanthohumol
#1
T Aydin, N Bayrak, E Baran, A Cakir
Insecticidal effects of the dichloromethane, ethyl acetate, acetone, ethanol and methanol extracts of Humulus lupulus (hops) L. cones and its principal components, xanthohumol was investigated on five stored pests, Sitophilus granarius (L.), Sitophilus oryzae (L.), Acanthoscelides obtectus (Say.), Tribolium castaneum (Herbst) and Lasioderma serricorne (F.). The mortality of adults of the insects treated with 2, 5, 5, 10 and 20 mg ml̠-1 concentrations of the extracts and xanthuhumol was counted after 24, 48, 72, 96 and 120 h...
March 23, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28325169/a-new-substitute-host-and-its-effects-on-some-biological-properties-of-ooencyrtus-kuvanae
#2
Hilal Tunca, Marine Venard, Etty-Ambre Colombel, Elisabeth Tabone
Lymantia dispar (L.) (Lepidoptera: Lymantriidae), commonly known as the gypsy moth, is a serious forest pest, and beneficial insects are particularly important for reducing its population numbers. Ooencyrtus kuvanae (Howard) (Hymenoptera: Encyrtidae) is an arrhenotokous, solitary egg parasitoid of L. dispar. In this study, we evaluated a new substitute host, Philosamia ricini (Danovan) (Lepidoptera: Saturniidae) for O. kuvanae. We investigated some of the biological effects of O. kuvanae on P. ricini eggs. In this context, the importance of the age of the female parasitoid (1, 3 or 5 days old), host age (1-2 and 3-4 days old) and host number (40, 60 and 80 host eggs) were examined under laboratory conditions (25 ± 1 °C, 65 ± 5% relative humidity and a 16 : 8 h photoperiod [light : dark])...
March 22, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28316286/brassica-aphid-hemiptera-aphididae-populations-are-conditioned-by-climatic-variables-and-parasitism-level-a-study-case-of-tri%C3%A3-ngulo-mineiro-brazil
#3
M V Sampaio, A P Korndörfer, J Pujade-Villar, J E A Hubaide, S E Ferreira, S O Arantes, D M Bortoletto, C M Guimarães, J A Sánchez-Espigares, B Caballero-López
Cosmopolitan pests such as Brevicoryne brassicae, Lipaphis pseudobrassicae, and Myzus persicae (Aphididae) cause significant damage to Brassicaceae crops. Assessment of the important biotic and abiotic factors that regulate these pests is an essential step in the development of effective Integrated Pest Management programs for these aphids. This study evaluated the influence of leaf position, precipitation, temperature, and parasitism on populations of L. pseudobrassicae, M. persicae, and B. brassicae in collard greens fields in the Triângulo Mineiro region (Minas Gerais state), Brazil...
March 20, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28290260/feeding-performance-and-life-table-parameters-of-khapra-beetle-trogoderma-granarium-everts-coleoptera-dermestidae-on-various-barley-cultivars
#4
A Golizadeh, Z Abedi
The Khapra beetle, Trogoderma granarium Everts (Coleoptera: Dermestidae), is a common pest of cereal grains and other stored products. In this study, the effects of ten barley cultivars (Abidar, Bahman, Line20, Line22, Line30, Lisuei, Lokht11, Makuyi, Sahand, and Sahraa) were evaluated on life table parameters and nutritional indices of T. granarium under the following laboratory conditions: 33 ± 1°C, 60 ± 5% RH, and a photoperiod of 14: 10 (L: D) h. Life history parameters of T. granarium could be appropriate indices in resistance and susceptibility evaluation of barley cultivars...
March 14, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28290255/feeding-by-leucopis-argenticollis-and-leucopis-piniperda-diptera-chamaemyiidae-from-the-western-usa-on-adelges-tsugae-hemiptera-adelgidae-in-the-eastern-usa
#5
K Motley, N P Havill, A L Arsenault-Benoit, A E Mayfield, D S Ott, D Ross, M C Whitmore, K F Wallin
Leucopis argenticollis (Zetterstedt) and Leucopis piniperda (Malloch) are known to feed on the lineage of Adelges tsugae Annand that is native to western North America, but it is not known if they will survive on the lineage that was introduced from Japan to the eastern USA. In 2014, western Leucopis spp. larvae were brought to the laboratory and placed on A. tsugae collected in either Washington (North American A. tsugae lineage) or Connecticut (Japanese lineage). There were no significant differences in survival or developmental times between flies reared on the two different adelgid lineages...
March 14, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28274282/flight-performance-of-macdunnoughia-crassisigna-lepidoptera-noctuidae
#6
X-W Fu, H Chang, L-M He, S-Y Zhao, K-M Wu
Macdunnoughia crassisigna Warren (Lepidoptera: Noctuidae) is a highly destructive herbivore that poses a serious risk to cotton, maize, soybean, and cruciferous vegetables in East Asia. Examining the effects of various biotic and abiotic factors on the flight performance of M. crassisigna is crucial for a better understanding of its trans-regional migration. In this study, the flight activity of M. crassisignai moths of different ages, under different temperatures and relative humidity (RH) levels, was evaluated by tethering individuals to computerized flight mills for a 24-h trial period...
March 9, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28264734/functional-sensorial-complementation-during-host-orientation-in-an-asilidae-parasitoid-larva
#7
J M Pueyrredon, J E Crespo, M K Castelo
Changes in environmental conditions influence the performance of organisms in every aspect of their life. Being capable of accurately sensing these changes allow organisms to better adapt. The detection of environmental conditions involves different sensory modalities. There are many studies on the morphology of different sensory structures but not so many studies showing their function. Here we studied the morphology of different sensory structures in the larva of a dipteran parasitoid. We occluded the putative sensory structures coupling the morphology with their function...
March 7, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28249637/effects-of-seasonality-on-drosophilids-insecta-diptera-in-the-northern-part-of-the-atlantic-forest-brazil
#8
R D Coutinho-Silva, M A Montes, G F Oliveira, F G de Carvalho-Neto, C Rohde, A C L Garcia
Seasonality is an important aspect associated with population dynamic and structure of tropical insect assemblages. This study evaluated the effects of seasonality on abundance, richness, diversity and composition of an insect group, drosophilids, including species native to the Neotropical region and exotic ones. Three preserved fragments of the northern Atlantic Forest were surveyed, where temperatures are above 20 °C throughout the year and rainfall regimes define two seasons (dry and rainy). As opposed to other studies about arthropods in tropical regions, we observed that abundance of drosophilids was significantly higher in the dry season, possibly due to biological aspects and the colonization strategy adopted by the exotic species in these environments...
March 2, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28245893/stability-of-nano-sized-permethrin-in-its-colloidal-state-and-its-effect-on-the-physiological-and-biochemical-profile-of-culex-tritaeniorhynchus-larvae
#9
P Mishra, A P B Balaji, P K Dhal, R S Suresh Kumar, S Magdassi, K Margulis, B K Tyagi, A Mukherjee, N Chandrasekaran
The occurrence of pesticidal pollution in the environment and the resistance in the mosquito species makes an urge for the safer and an effective pesticide. Permethrin, a poorly water-soluble pyrethroid pesticide, was formulated into a hydrodispersible nanopowder through rapid solvent evaporation of pesticide-loaded oil in water microemulsion. Stability studies confirmed that the nanopermethrin dispersion was stable in paddy field water for 5 days with the mean particle sizes of 175.3 ± 0.75 nm and zeta potential of -30...
March 1, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28245887/real-time-pcr-assay-for-distinguishing-frankliniella-occidentalis-and-thrips-palmi-arnika-przybylska-%C3%A5-aneta-fiedler-aleksandra-obr%C3%A4-palska-st%C3%A4-plowska
#10
Arnika Przybylska, Żaneta Fiedler, Patryk Frąckowiak, Aleksandra Obrępalska-Stęplowska
Thrips palmi and Frankliniella occidentalis (order Thysanoptera) are thrips species that represent major plant pests. They are polyphagous insects capable of adversely affecting crop production. As such, in the European Union, these thrips species should be regulated as quarantine organisms. T. palmi and F. occidentalis can cause considerable damage to susceptible plants by feeding on them and transmitting several viruses responsible for serious plant diseases. Successful pest control strategies are based on an early, fast, and reliable diagnosis, which precedes the selection of appropriate steps to limit the effects of harmful organisms...
March 1, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28245886/floral-abundance-richness-and-spatial-distribution-drive-urban-garden-bee-communities
#11
M Plascencia, S M Philpott
In urban landscapes, gardens provide refuges for bee diversity, but conservation potential may depend on local and landscape features. Foraging and population persistence of bee species, as well as overall pollinator community structure, may be supported by the abundance, richness, and spatial distribution of floral resources. Floral resources strongly differ in urban gardens. Using hand netting and pan traps to survey bees, we examined whether abundance, richness, and spatial distribution of floral resources, as well as ground cover and garden landscape surroundings influence bee abundance, species richness, and diversity on the central coast of California...
March 1, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28236808/role-of-plant-volatiles-and-hetero-specific-pheromone-components-in-the-wind-tunnel-response-of-male-grapholita-molesta-lepidoptera-tortricidae-to-modified-sex-pheromone-blends
#12
B Ammagarahalli, L Chianella, P Gomes, C Gemeno
Female Grapholita molesta (Busck) release a pheromone blend composed of two stereoisomeric acetates (Z8-12:Ac and E8-12:Ac), which in a 100:6 ratio stimulate maximum conspecific male approach. Z8-12:OH is described as a third pheromone component that increases responses to the acetate blend. Departures from the optimal pheromone blend ratio, or too high or low pheromone doses of the optimal blend ratio, result in lower male response. In a previous study, we show that plant volatiles synergize male response to a suboptimal-low pheromone concentration...
February 27, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28228181/characterization-and-functional-analysis-of-serpin-1-like-gene-from-oak-silkworm-antheraea-pernyi
#13
H M Yu, B J Zhu, Y Sun, G Q Wei, L Wang, C Qian, M Nadeem Abbas, C L Liu
Serpins are a broadly distributed family of proteases found in various organisms that play an important role in regulating the immune response. Here, we identified a serpin-1 gene from Antheraea pernyi that encodes a 279 amino acid protein with a molecular weight of 30.8 kDa. We expressed the recombinant Ap-serpin-1 protein in Escherichia coli and used the purified protein to prepare rabbit anti-Ap-serpin-1 polyclonal antibodies. We calculated the enzyme-linked immunosorbent assay titer of the antibody as 1:128000...
February 23, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28220727/effects-of-cold-storage-on-the-biological-characteristics-of-microplitis-prodeniae-hymenoptera-braconidae
#14
Z Yan, J J Yue, C Bai, Z Q Peng, C H Zhang
The endoparasitoid Microplitis prodeniae Rao and Chandry is an important potential augmentative biological control agent for lepidopteran pests of vegetables and tobacco. However, cold storage of pupae is required to ensure that sufficient parasitoids are available when they are needed in the field. In this study, pupae were maintained at 0, 4 or 10°C for 5-50 days after which the adults were evaluated for emergence, pre-emergence period, sex ratio, female longevity, oviposition period, and fecundity. Cold storage did not affect the pre-emergence period or proportion of females; however, there was a significant reduction in emergence, female longevity, oviposition period, and fecundity with increased exposure to cold...
February 21, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28202103/deterrent-activity-of-hops-flavonoids-and-their-derivatives-against-stored-product-pests
#15
J Jackowski, J Popłoński, K Twardowska, J Magiera-Dulewicz, M Hurej, E Huszcza
Five flavonoids from hops, two of their derivatives, along with naringenin used as a model compound, were tested for their antifeedant activity against three coleopteran stored product pests: Sitophilus granarius L., Tribolium confusum Duv. and Trogoderma granarium Everts. The introduction, into the tested flavonoid molecules, of additional structural fragments such as prenyl or dimethylpyran moiety, is proposed to significantly alter the deterrent activity of the compounds. The prenyl moiety in flavonoids increased the deterrent activity of these compounds in all three of the grain feeding species used in the tests...
February 16, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28202094/impact-of-routine-bacillus-thuringiensis-israelensis-bti-treatment-on-the-availability-of-flying-insects-as-prey-for-aerial-feeding-predators
#16
Ute Timmermann, Norbert Becker
Since 1980, mosquito breeding habitats in the Upper Rhine Valley were routinely treated with Bacillus thuringiensis var. israelensis (Bti). Bti is considered to significantly reduce the number of mosquitoes, and - especially when used in higher dosages - to be toxic to other Nematocera species, e.g. Chironomidae, which could be food sources for aerial feeding predators. To investigate direct and indirect effects of routine Bti treatment on food sources for aerial feeding predators, the availability of flying insects in treated and untreated areas was compared...
February 16, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28185608/effect-of-heat-waves-on-embryo-mortality-in-the-pine-processionary-moth
#17
S Rocha, C Kerdelhué, M L Ben Jamaa, S Dhahri, C Burban, M Branco
Extreme climate events such as heat waves are predicted to become more frequent with climate change, representing a challenge for many organisms. The pine processionary moth Thaumetopoea pityocampa is a Mediterranean pine defoliator, which typically lays eggs during the summer. We evaluated the effects of heat waves on egg mortality of three populations with different phenologies: a Portuguese population with a classical life cycle (eggs laid in summer), an allochronic Portuguese population reproducing in spring, and a Tunisian population from the extreme southern limit of T...
February 10, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28185607/robustness-of-plant-insect-herbivore-interaction-networks-to-climate-change-in-a-fragmented-temperate-forest-landscape
#18
K W Bähner, K A Zweig, I R Leal, R Wirth
Forest fragmentation and climate change are among the most severe and pervasive forms of human impact. Yet, their combined effects on plant-insect herbivore interaction networks, essential components of forest ecosystems with respect to biodiversity and functioning, are still poorly investigated, particularly in temperate forests. We addressed this issue by analysing plant-insect herbivore networks (PIHNs) from understories of three managed beech forest habitats: small forest fragments (2.2-145 ha), forest edges and forest interior areas within three continuous control forests (1050-5600 ha) in an old hyper-fragmented forest landscape in SW Germany...
February 10, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28185606/measuring-population-fluctuation-of-jatropha-stem-borer-cophes-notaticeps-marshall-in-the-brazilian-cerrado-using-a-new-trap
#19
C M Oliveira, C N Silva, M R Frizzas, A C Dianese
This study aimed to monitor the population fluctuation of Cophes notaticeps (Marshall) (Coleoptera: Curculionidae) in a jatropha (Jatropha curcas L.) plantation in the Federal District, Brazil, through the use of a new trap, combined with different attractive lures and trap colors. The study was conducted at Embrapa Cerrados (Planaltina/DF) in a field trial with 720 plants. The new trap, named CPAC16, was made with PVC pipes (100 mm in diameter) of about 40 cm in length, with a window (8 × 10 cm2) in its center to enable insect access...
February 10, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28185604/what-does-the-southern-brazilian-coastal-plain-tell-about-its-diversity-syrphidae-diptera-as-a-model
#20
F D Kirst, L Marinoni, R F Krüger
The natural areas of the Coastal Plain of Rio Grande do Sul (CPRS) have suffered fragmentation due to anthropic action. The faunal surveys offer a low-cost method to quickly evaluate environmental alterations, and Syrphidae flies are often used as models in this kind of study. We aimed to ascertain the diversity of Syrphidae in the South region of Brazil by estimating its species' richness, and to use this data to identify new areas for conservation. In this survey Malaise traps were installed for 8 days in the CPRS, which was divided into five regions...
February 10, 2017: Bulletin of Entomological Research
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