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Coinfection of the secondary symbionts,Hamiltonella defensa and Arsenophonus *** to the performance of the major aphid pest,Aphis gossypii(Hemiptera:Aphididae)

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Insect Science 2020年第1期27卷 86-98页

作者： Aida Ayoubi ali asghar talebi Yaghoub Fathipour Mohammad Mehrabadi Faculty of Agriculture Department of EntomologyTarbiat Modares UniversityTehranIran

Bacterial endosymbionts play important roles in ecological traits of *** this study,we characterize the bacterial endosymbionts of *** collected in Karaj,Iran and their role in the performance of the *** results indicated that beside Buchnera aphidicola,***,also harbors both Hamiltonella defensa and Arsenophonus *** PCR(qPCR)results revealed that the populations of the endosymbionts increased throughout nymphal development up to adult emergence;thereafter,populations of Buchnera and Arsenophonus were diminished while the density of *** constantly *** reduction caused prolonged development and no progeny ***,secondary symbiont reduction led to reduction of the total life span and intrinsic rate of natural increase as well as appearance of the deformed dead offspring in comparison with the control *** of the secondary symbionts did not affect parasitism rate of the aphid by the parasitic wasp Aphidius *** these findings showed that *** and Arsenophonus contributed to the fitness of *** by enhancing its performance,but not through parasitoid resistance.

关键词： Arsenophonus Buchnera aphidicola cotton aphid Hamiltonella defensa parasitism resistance

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Comparative demography of Liriomyza sativae Blanchard （Diptera： Agromyzidae） on cucumber at seven constant temperatures

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Insect Science 2006年第6期13卷 477-483页

作者： MOSTAFA HAGHANI YAGHOUB FATHIPOUR ali asghar talebi ValiOLLAH BANIAMERI Department of Entomology Faculty of Agriculture Tarbiat Modares University Department of Agricultural Entomology Plant Pests and Diseases Research Institute Tehran Iran

Reproduction and population parameters of vegetable leafminer, Liriomyza sativae Blanchard were measured on cucumber （Cucumis sativus L.） at seven constant temperatures （10, 15, 20, 25, 30, 35 and 40℃）. No eggs were found at 10℃ and flies died after exposure to 40℃. The significantly highest intrinsic rate of natural increase （rm）, net reproductive rate （R0） and finite rate of increase （λ） ofL. sativae were obtained at 25℃ as 0.196, 52.452, and 1.216, respectively. The above-mentioned parameters decreased at 15℃ and 135℃ and this reduction at 35℃ was strong. Doubling time （DT） varied significantly with temperature. The shortest doubling time was obtained at 25℃. Mean generation time （T） decreased significantly with increasing temperature between 15℃ and 35℃. Percentage of immature ages in the stable age distribution was more than 95% at all temperatures. Female longevity was greater than male at all temperatures. Liriomyza sativae lived for a long time at 15℃, whereas at 35℃ had lower survival rates. The effect of temperature on reproduction, especially the intrinsic rate of increase of L. sativae would be useful for predicting its longterm population fluctuation over several generations.

关键词： cucumber demography intrinsic rate of increase life table Liriomyza sativae temperature

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Quality control of the parasitoid wasp Trichogramma brassicae (Hymenoptera: Trichogrammatidae) over 45 generations of rearing on Sitotroga cerealella

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Insect Science 2021年第1期28卷 180-190页

作者： Ehsan Ghaemmaghami Yaghoub Fathipour Abdoolnabi Bagheri ali asghar talebi Gadi V.P.Reddy Department of Entomology Faculty of AgricultureTarbiat Modares UniversityTehranIran Plant Protection Research Department Hormozgan Agricultural and Natural Resources Research and Education CenterAgricultural Research Education and Extension Organization(AREEO)Bandar AbbasIran USDA-ARS-Southern Insect Pest Management Research Unit StonevilleMississippiUSA

Trichogramma brassicae(Bezdenko)is an important biological control agent that has been used widely against many lepidopteran ***,colonies of Trichogramma are mass reared on factitious hosts such as Sitotroga cerealella(Olivier)over many *** this study,we evaluated the quality and performance of a colony of *** that had been reared for over 45 generations(G)using two-sex life table parameters and parasitism *** found that female adult longevity was significantly different among sequential generations,ranging from 5.58±2.5 d(at G5)to 3.75±1.42 d(at G45).However,no significant difference was found in male adult longevity among different *** female wasps survived longer until the 15th gener・ation,they allocated more days for egg laying at G5 and *** highest values of gross reproductive rate(GRR),net reproductive rate(7.),intrinsic rate of increase(r),finite rate of increase(λ)and mean generation time(T)were found in G5 and GIO,which also showed significantly higher *** significant difference in the finite parasitism rate(co)was found among generations up to *** results suggest that *** wasps held under continuous laboratory rearing can be used successfully in biological control programs until the 15th generation without any loss of quality or ***,laboratory mass rearing colonies declined in quality after 15 generations and we suggest that they should be rejuvenated regularly by adding field-collected parasitoids periodically.

关键词： biological control generation-dependent demography mass rearing parasitism rate Trichogramma brassicae

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