Results 171 to 180 of about 4,749 (197)
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Studies on glutathione S-transferase in Helicoverpa ( = Heliothis) zea
Insect Biochemistry, 1991Abstract The amount of glutathione S-transferase activity present in various stages of development and in various tissues of an insecticide susceptible strain of Helicoverpa zea was determined. GSH S-transferase activity toward CDNB (1-chloro-2,4-dinitrobenzene) was detected in the egg, and increased throughout the larval stages and was the highest ...
C. Chien, W.C. Dauterman
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Journal of Invertebrate Pathology, 2000
Capsular proteins from Helicoverpa armigera granulovirus (HaGV) have previously been shown to enhance H. armigera nucleopolyhedrovirus (HaSNPV) infection in H. armigera larvae. Yet, HaGV and HaS-NPV, as viable viruses, interfered with one another. In our study, we have examined the effects of co-infection of the slow-killing virus HaGV with the fast ...
K J, Hackett +5 more
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Capsular proteins from Helicoverpa armigera granulovirus (HaGV) have previously been shown to enhance H. armigera nucleopolyhedrovirus (HaSNPV) infection in H. armigera larvae. Yet, HaGV and HaS-NPV, as viable viruses, interfered with one another. In our study, we have examined the effects of co-infection of the slow-killing virus HaGV with the fast ...
K J, Hackett +5 more
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Structure activity studies of PBAN of Helicoverpa zea (Lepidoptera:noctuidae)
Insect Biochemistry and Molecular Biology, 1992Abstract Hexapeptide and pentapeptide analogs of the C-terminal sequence (Tyr-Phe-Ser-Pro-Arg-Leu-NH2) of Helicoverpa zea-pheromone biosynthesis activating neuropeptide (Hez-PBAN) were made and tested for pheromonotropic activity. Modifications of N-terminal nitrogen of Tyr and its substitution with d -Tyr lowered activity drastically.
Ashok K. Raina, Thomas G. Kempe
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Horizontal transmission of Hz-2V by virus infected Helicoverpa zea moths
Journal of Invertebrate Pathology, 2004Helicoverpa zea female moths productively infected with Hz-2V have malformed reproductive tissues and are sterile. Virus replication in infected females occurs primarily in the reproductive tissues and culminates with the accumulation of virus-filled vesicles, which form plugs of virus covering the reproductive openings of these insects.
John P, Burand +2 more
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Genetic basis of resistance to the Vip3Aa Bt protein in Helicoverpa zea
Pest Management Science, 2021Fei Yang +2 more
exaly