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- Title
METHOD OF COMBATING THE QUARANTINE PEST OF COTTON HELICOVERPA ARMIGERA.
- Authors
TURAEVA, S. M.; ISMAILOVA, D. S.; KHASANOV, Sh. Sh.; NURMAKHMADOVA, P. A.; DJURAEV, D. T.
- Abstract
In recent years, many chemical compounds have been shown to be effective against crop insects but the practical efficacy of only a few compounds has been observed. In this work, for the first time, the insecticidal activity of the 1,3,4-oxadiazole derivative against the global crop pest - Helicoverpa armigera was evaluated in laboratory, the toxicity (LD50) of 1,3,4-oxadiazole derivative was evaluated against the insect, as wellas the effectiveness against H. armigera in the field. It was found that the 1,3,4-oxadiazole derivative at 0.1 mg/mL caused 65.5% -69.0% mortality of larvae H. armigera after 24 - 48 hours of incubation. The toxicity of SD-79 against larva H. armigera was LC50 0.42 mg/mL. The insecticidal activity of the 1,3,4-oxadiazole derivative was studied for the first time in vitro against Helicopvera zea, Spodoptera frugiperda, and Trichoplusiya ni insect cells. The results obtained confirm that 1,3,4-oxadiazole derivative at a dose of 10 μM/mL exhibits strong toxicity against cells of various cutworm species, which is confirmedin the experiment in vivo. The field trials of effectiveness against larvae H. armigera were conducted in the Tashkent region during the 2022 cropping season. The results of field trials showedthat on the 7th day, the effectiveness of 1,3,4-oxadiazole derivative at a rate of 0.2 kg/ha against larvae H. armigera was 56.0% compared to the control, 11.0% more compared to the insecticide BI-58 (a.i. dimethoate). Thus, it can be assumed that the 1,3,4-oxadiazole derivative can control the number of larvae H. armigera with the best control efficiency of more than 58.5% at an increased level of economic damage threshold in the field conditions of the Tashkent region.
- Subjects
TASHKENT (Uzbekistan); HELICOVERPA armigera; FALL armyworm; AGRICULTURAL pests; FIELD research; BT cotton; DIMETHOATE; INSECTICIDES
- Publication
Journal of Research in Pharmacy, 2023, Vol 27, p70
- ISSN
2630-6344
- Publication type
Article