Resistance of Helicoverpa assulta (Guenée) (Lepidoptera: Noctuidae) to fenvalerate, phoxim and methomyl in China

2009 ◽  
Vol 28 (2) ◽  
pp. 162-167 ◽  
Author(s):  
Xiao Ming Xia ◽  
Kai Yun Wang ◽  
Hong Yan Wang
Keyword(s):  
Helicoverpa Assulta ◽  
Lepidoptera Noctuidae

Effects of the sap of the common oleander Nerium indicum (Apocyanaceae) on male fertility and spermatogenesis in the oriental tobacco budworm Helicoverpa assulta (Lepidoptera, Noctuidae)

2001 ◽  
Vol 204 (22) ◽  
pp. 3935-3942 ◽  
Author(s):  
Seong Eun Jeong ◽  
Yun Lee ◽  
Jeong Hee Hwang ◽  
Douglas C. Knipple
Keyword(s):  
Male Fertility ◽  
Chemical Constituents ◽  
Direct Injection ◽  
Arginine Decarboxylase ◽  
Tobacco Budworm ◽  
Polyamine Metabolism ◽  
Helicoverpa Assulta ◽  
Continuous Feeding ◽  
The Common ◽  
Lepidoptera Noctuidae

SUMMARY We investigated the effects of sap of the common oleander Nerium indicum (Apocyanaceae) on male fertility and spermatogenesis in the oriental tobacco budworm Helicoverpa assulta. We found that continuous feeding of oleander sap during the larval period significantly affects fertility in males but not in females. This effect was also induced by direct injection of oleander sap into the hemocoel of 2-day-old pupae. Histological analyses of developing testes following oleander injection revealed a developmental delay and progressively more severe morphological abnormalities in the later stages of development. The effects of oleander sap on spermatogenesis in H. assulta were associated with greatly reduced levels of the two major polyamines, spermidine and spermine, in testis compared with saline-injected controls. In contrast, levels of putrescine, which is a precursor of both spermidine and spermine, and the activities of the enzymes ornithine decarboxylase and arginine decarboxylase, which are involved in the biosynthesis of putrescine, were initially elevated following oleander injection, but subsequently failed to undergo the induction that normally occurs during late pupal development. The effects of oleander sap on spermidine and spermine levels could be the result of direct inhibition by chemical constituents of the oleander sap of one of the enzymes used in common in the conversions of putrescine to spermidine and spermidine to spermine; alternatively, these effects on polyamine metabolism could be secondary to the disruption of a more fundamental process in the developmental program guiding spermatogenesis in H. assulta.

An odorant receptor and glomerulus responding to farnesene in Helicoverpa assulta (Lepidoptera: Noctuidae)

2019 ◽  
Vol 115 ◽  
pp. 103106 ◽  
Author(s):  
Han Wu ◽  
Rui-Ting Li ◽  
Jun-Feng Dong ◽  
Nan-Ji Jiang ◽  
Ling-Qiao Huang ◽  
...  
Keyword(s):  
Odorant Receptor ◽  
Helicoverpa Assulta ◽  
Lepidoptera Noctuidae

A receptor-neuron correlate for the detection of attractive plant volatiles in Helicoverpa assulta (Lepidoptera: Noctuidae)

2018 ◽  
Vol 97 ◽  
pp. 31-39 ◽  
Author(s):  
Wei-chan Cui ◽  
Bing Wang ◽  
Meng-bo Guo ◽  
Yang Liu ◽  
Emmanuelle Jacquin-Joly ◽  
...  
Keyword(s):  
Plant Volatiles ◽  
Receptor Neuron ◽  
Helicoverpa Assulta ◽  
Lepidoptera Noctuidae

scholarly journals Comparative status of insecticide resistance in the Helicoverpa and Heliothis species (Lepidoptera: Noctuidae) of south India

1996 ◽  
Vol 86 (5) ◽  
pp. 525-531 ◽  
Author(s):  
Deepak R. Jadhav ◽  
Nigel J. Armes
Keyword(s):  
Helicoverpa Armigera ◽  
Light Trap ◽  
The Other ◽  
Helicoverpa Assulta ◽  
Datura Metel ◽  
Cropping Season ◽  
Wild Host ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae ◽  
Heliothis Peltigera

AbstractHelicoverpa armigera (Hübner), H. assulta Guenée and Heliothis peltigera (Denis & Schiffermüller) were collected as mixed populations from safflower and the wild host Datura metel, from Patancheru, Andhra Pradesh, India, in 1992 and 1993, and their toxicological responses to insecticides determined. Both Helicoverpa armigera strains were highly resistant to cypermethrin, fenvalerate, endosulfan and quinalphos insecticides, based on resistance ratios relative to laboratory reared susceptible strains. There was no evidence of resistance development in H. assulta and Heliothis peltigera to the same chemicals. Light trap data collected from 1974 to 1987 showed that Helicoverpa armigera was at least 100 × more abundant than the other two species over most of the cropping season. Peak catches of H. assulta and Heliothis peltigera were confined to defined times in the season, corresponding with the flowering and fruiting periods of their respective host plants; August-October for Helicoverpa assulta and November-December for Heliothis peltigera. Helicoverpa armigera on the other hand, because of its high polyphagy on commercial and wild hosts, was abundant between August and April. Resistance has not developed in H. assulta and Heliothis peltigera in southern India, probably because of their restricted host range, limiting exposure to insecticides.

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