Performances Evaluation of Plant’ Extracts and Standard Pesticides Sgainst Helicoverpa armigera and Bemisia tabaci of Tomato (Solanum lycopersicum L.)

Authors : Kansaye Laya; Sissoko Samba dit Mamoudou; Kansaye Aly; Diallo Seydou; Traoré Mahamoudou; Coulibaly Amadou Konotie

Volume/Issue : Volume 7 - 2022, Issue 1 - January

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Helicoverpa armigera and Bemisia tabaci remain major insect pests of tomato in horticultural production areas of Mali; Producers prefer chemical control methods for their management, which were not often effective. The aim of this study was to improve tomato production system by using plants’ extract. The experimental design was randomized Fischer block with three replications to compare performance of two plants’ extract formula with Rapax and Lambda Master 2.5EC. Entomological observations and agronomic measurements were made on marked plants in the observation squares. The results reveal that the plant extracts gave similar efficiencies to the commercialized pesticides Lambda and rapax on Bemisia tabaci with percentages of efficiencies varying between 58.33% and 72.62%. Against Helicoverpa. armigera rapax, the formula 2 and 1 were poorly effective with less than 50% while Lambda offered a percentage of effectiveness ranging between 52 and 63%. The best yields were recorded with Formula 1 and 2 treatment (36.72 T/ha; 32.40 T/ha), respectively and (30.56 T/ha) for rapax. Results of variance have shown different significant effects level of pesticides applied on tomato yield (p=0.001 with α=0.05). Therefore, this study recommends plants’ extract as alternative to chemical control of Bemisia tabaci in tomato.

Keywords : Plant’ extract; Helicoverpa armigera; Bemisia tabaci; Tomato, Katibougou


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