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VOL. 11, ISSUE 2 (2026)
Field evaluation of the efficacy of new chemical and biological molecules against Amrasca biguttula in the central cotton-growing region of Senegal
Authors
Mokho Sarr, Ghislain Kanfany, Mbacké Sembéne
Abstract
The 2022/2023 cotton season was marked by
severe and persistent infestations by a new species of leafhopper, Amrasca
biguttula (Ishida), commonly known as the Indian cotton leafhopper.
Production losses caused by this species are estimated at over 50% compared to
the season’s forecast. This study aimed to evaluate the biological efficacy of
new chemical and biological compounds against infestations of A. biguttula
in Senegal’s cotton-growing region. Seven chemical insecticide formulations and
one biological formulation based on Azadirachtin were tested using randomized
complete block design with three replications. Field efficacy was of each
formulation was evaluated by comparing leafhopper infestation following
insecticide applications. The treatment effects were analyzed using an analysis
of variance (ANOVA). The results show that the formulations Plinazolin 40 g/ha,
Dinotefuran 110 g/l + Bifenthrin 27.5 g/ha; Nitenpyram 75 g/ha + Pyriproxyfen
75 g/ha + Indoxacarb 25 g/ha, Fluxamethamide 30 g/ha and Flonicamid 50 g/ha +
Indoxacarb 30 g/ha, demonstrate a good level of control over A. biguttula.
The best yields were also observed with these formulations. The insecticide
combinations Acetamiprid 30 g/ha + Indoxacarb 25 g/ha, Sulfoxaflor 20 g/ha +
Emamectin benzoate 10 g/ha and Azadirachtin-10 g/ha show a low efficacy against
leafhoppers. The effective formulations could be used alternately in leafhopper
control programmes to manage resistance in these pests in cotton-growing areas.
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Pages:149-154
How to cite this article:
Mokho Sarr, Ghislain Kanfany, Mbacké Sembéne "Field evaluation of the efficacy of new chemical and biological molecules against <i>Amrasca biguttula</i> in the central cotton-growing region of Senegal". International Journal of Zoology Studies, Vol 11, Issue 2, 2026, Pages 149-154
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