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VOL. 9, ISSUE 6 (2024)
Efficacy of two pesticides against Helicoverpa Armigera (Lepidoptera: Noctuidae) found on tomato plants in the bafing region, Touba, Côte d'Ivoire
Authors
Diabate Dohouonan, Fondio Drissa, Diby Yao Kan Séraphin, Akpesse Akpa Alexandre Moïse, Tano Yao
Abstract
Helicoverpa armigera is
a major pest of tomato crop. It reduces tomato fruit quality despite pesticides
spraying. This study carried out to evaluate the efficacy of two pesticides
commonly used by the farmers against the tomato fruit borer Helicoverpa
armigera in Touba department, Côte d’Ivoire. The number and damage of Helicoverpa
armigera larvae on tomato plants were recorded four times, from 41st
to 62nd day after the transplanting of tomato plants on a
quarter-hectare plot established on March 1, 2022. This plot was subdivided
into three equal subplots. Two subplots of tomato plants were treated with the
pesticides K-OPTIMAL 35EC® and SAUVEUR 62EC®, respectively and the third
subplot was untreated. Each subplot was subdivided into four elementary plots.
The results showed that the pesticides K-OPTIMAL 35EC® (1.5 larvae) and SAUVEUR
62EC (1.25 larvae) significantly reduced Helicoverpa armigera larvae on
tomato crop compared with the control plots (5.5 larvae) per 12 plants
(p<0.0001). Tomato fruits attack rates were 25.26%, 5.01% and 2.08% in
untreated tomato plots and in plots treated with K-OPTIMAL 35EC® and SAUVEUR
62EC, respectively (p<0.0001). The percentage reduction of tomato fruit damaged
by Helicoverpa armigera compared to untreated tomato plots was 80.19%
and 91.76% for K-OPTIMAL 35EC® and SAUVEUR 62EC, respectively. Yield loss
percentages were 30.69%, 4.58% and 2.43% for the control, K-OPTIMAL 35EC® and
SAUVEUR 62EC®, respectively (p<0.0001). The pesticide SAUVEUR 62EC® can be
used to protect tomato crops against Helicoverpa armigera.
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Pages:138-142
How to cite this article:
Diabate Dohouonan, Fondio Drissa, Diby Yao Kan Séraphin, Akpesse Akpa Alexandre Moïse, Tano Yao "Efficacy of two pesticides against <i>Helicoverpa Armigera</i> (Lepidoptera: Noctuidae) found on tomato plants in the bafing region, Touba, Côte d'Ivoire". International Journal of Entomology Research, Vol 9, Issue 6, 2024, Pages 138-142
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