International Journal of Entomology Research

International Journal of Entomology Research


International Journal of Entomology Research
International Journal of Entomology Research
Vol. 2, Issue 2 (2017)

Toxic and disruptive effects of Novaluron, a chitin synthesis inhibitor, on development of the pink bollworm Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae)


Ghoneim K, Hassan HA, Tanani MA, Bakr NA

The pink bollworm Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) is one of the most destructive insects attacking cotton fields world-wide. It acquired resistance against most of the conventional pesticides. Therefore, the present study was conducted to evaluate the toxic and developmental effects of Novaluron (concentration range: 5.0-0.05 ppm) on this insect pest. LC50 values were estimated in 0.187 ppm and 0.765 ppm, after treatment of newly hatched and full grown larvae, respectively. Novaluron exhibited a retarding effect on the development, especially after treatment of full grown larvae, since larval and pupal durations had been remarkably prolonged, in a dose-dependent manner. Novaluron failed to affect the metamorphosis after treatment of the newly hatched larvae but disrupted it after treatment of full grown larvae (larval-pupal intermediates). The pupation was considerably hindered, especially after treatment of full grown larvae. The pupal morphogenesis was deranged (deformed pupae) after treatment of only newly hatched larvae. Therefore, Novaluron forms an important component in the integrated pest management program for this insect pest which has developed resistance to the majority of conventional insecticides.
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How to cite this article:
Ghoneim K, Hassan HA, Tanani MA, Bakr NA. Toxic and disruptive effects of Novaluron, a chitin synthesis inhibitor, on development of the pink bollworm Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae). International Journal of Entomology Research, Volume 2, Issue 2, 2017, Pages 36-47
International Journal of Entomology Research