Results 51 to 60 of about 22,549 (224)

Growth and Development of Helicoverpa armigera (Lepidoptera: Noctuidae) Larvae Infected by Heliothis virescens ascovirus 3i (HvAV-3i)

Frontiers in Physiology, 2020
Although the cotton bollworm Helicoverpa armigera has traditionally been controlled by application of chemical pesticides, chemical control selects for resistance, pollutes the environment, and endangers human health.
Gong Chen, Hangwei Liu, Bo Mo, Jue Hu, Shuang-qing Liu, C. Bustos‐Segura, Jin Xue, Xing Wang   +7 more
semanticscholar   +1 more source

Role of mitochondrial complex I genes in host plant expansion of Bactrocera tau (Tephritidae: Diptera) by CRISPR/Cas9 system

Insect Science, EarlyView.
The role of 3 mitochondrial complex I gene in host expansion of Bactrocera tau was verified by CRISPR/Cas9 gene editing system. A stable homogenous strain (Btndufa7‐/‐) of B.tau was established after silencing Ndufa7. The reduced size of larvae and pupae of Ndufa7 knockout strain was first found.Then different levels of fitness and relative expression ...
Wei Shi, Linsheng He, Ruixiang Li, Jun Cao   +3 more
wiley   +1 more source

Proteolysis activation of Cry1Ac and Cry2Ab protoxins by larval midgut juice proteases from Helicoverpa armigera

PLoS ONE, 2020
Proteolytic processing of Bacillus thuringiensis (Bt) Cry protoxins by insect midgut proteases is critical to their insecticidal activities against target insects.
Shaoyan Liu, Shuo Wang, Shuwen Wu, Yidong Wu, Yihua Yang   +4 more
semanticscholar   +1 more source

Insights on the nutritional ecology of a nocturnal pollinating insect

Insect Science, EarlyView.
Nutritional ecology examines the environmental effects on nutritional needs, food intake and foraging behaviors, and the use of nutrients ingested by animals. Among insects, Lepidoptera are often considered opportunistic foragers that visit a wide variety of available flowers, although with some preferences.
Evan Force, Caroline Suray, Charlotte Girardin, Michel B.C. Sokolowski, Matthieu Dacher   +4 more
wiley   +1 more source

Calcineurin-Modulated Antimicrobial Peptide Expression Is Required for the Development of Helicoverpa armigera

Frontiers in Physiology, 2019
Helicoverpa armigera is a universal pest around the world that has been extensively used as a model organism for agricultural pests. Calcineurin (CAN) is an important Ca2+-dependent phosphatase that is participated in various biological pathways.
Jizhen Wei, Linhong Li, Shuangyan Yao, Shuo Yang, Shuai Zhou, Xiaoguang Liu, Mengfang Du, Shiheng An   +7 more
doaj   +1 more source

Molecular mechanisms of sex determination in Lepidoptera: current status and perspectives

Insect Science, EarlyView.
The genetic basis of sex determination in Lepidoptera was discovered in 2014 in the silkworm Bombyx mori. In this model species, the W chromosome‐derived small piRNA called Fem piRNA downregulates the expression of a Z‐linked gene, Masculinizer (Masc), which leads to the default female‐specific splicing of the doublesex gene (dsxF) and thus to female ...
František Marec, Atsuo Yoshido, Arjen E. van′t Hof   +2 more
wiley   +1 more source

Occurrence of Helicoverpa armigera (Hübner, 1808) on citrus in the state of Sao Paulo, Brazil

Revista Brasileira de Fruticultura, 2014
The occurrence of Helicoverpa armigera (Hübner, 1808) was first reported in citrus orchard in the state of São Paulo (SP). High infestation levels of H. armigera were observed in October 2012, in the city of Botucatu, SP.
Regiane Cristina Oliveira de Freitas Bueno, Pedro Takao Yamamoto, Marina Mouzinho Carvalho, Nádia Maebara Bueno   +3 more
doaj   +1 more source

Insecticide resistance in field populations of the tomato fruitworm, Helicoverpa armigera, from Senegal

, 2020
Monitoring of the evolution of insecticide resistance in the field is crucial to prevent pest control issues. The present study was conducted to assess insecticide resistance status of the fruitworm, Helicoverpa armigera (Hubner) (Lepidoptera, Noctuidae),
S. O. Sène, Etienne Tendeng, M. Diatte, S. Sylla, Babacar Labou, A. Diallo, K. Diarra   +6 more
semanticscholar   +1 more source

Effects of climate change and crop planting structure on the abundance of cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)

Ecology and Evolution, 2020
The interactions between plants and insects play an important role in ecosystems. Climate change and cropping patterns can affect herbivorous pest insect dynamics.
Jian Huang, HongFei Hao
semanticscholar   +1 more source

DsiRNA‐mediated silencing of Ceratitis capitata transformer or transformer‐2 leads to masculinization of XX embryos and systemic gene silencing in ovaries

Insect Science, EarlyView.
We carried out functional studies using Dicer‐substrate small interfering RNAs (DsiRNAs), targeting the sex determination genes Cctransformer (Cctra) and Cctransformer‐2 (Cctra‐2) in the Mediterranean fruit fly (Ceratitis capitata). Microinjection of DsiRNAs into XX embryos (0‐1 h old) rapidly triggered the expression of male‐specific Cctra isoforms ...
Gennaro Volpe, Sarah Maria Mazzucchiello, Domenico De Falco, David Torrente, Stefania Liguori, Noemi Rosati, Dora Baccaro, Michela Mazzeo, Fulvio Bertolotto, Harshini Sangle, Ennio Giordano, Angela Carfora, Francesca Lucibelli, Marianna Varone, Paola Di Lillo, Hugo Diego Perdomo, Mariangela Bonizzoni, Serena Aceto, Marco Salvemini, Molly Duman‐Scheel, Giuseppe Saccone   +20 more
wiley   +1 more source