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VOL. 7, ISSUE 1 (2025)
Effect of using some chemical control methods and plant extract on response of three soybean genotypes to Spodoptera littoralis (Boisd) infestation, in Dakahlia Governorate, Egypt
Authors
Walaa A Tawfik, Ouda MI, Saleem A Alsalhee
Abstract
This study focused on evaluating three soybean
genotypes (Giza 35, Giza111 and Crawford) to infestation with spodotera
littoralis and the effectiveness of lemongrass plant extract, compared with
chemical and biological insecticides against S. littoralis larval instar
under field condition. Results showed that when treating the second instar
larvae of S. littoralis the efficiency of the chemical insecticide was
(86%) and bio insecticide was (55.53%) respectively after the first day of
treatment, compared to the repellent effect of lemongrass extract (43.11%),
while after the third day of spraying, the effect of lemongrass extract
increased to (70.46% respectively) which gave repellent effect on the (2nd
and 4Th) instar larval, compared with biological insecticide
(Agerin) in all varieties of soybeans under study. The results clearly showed
that there were significant variations for the effect of either Soybean
varieties or insecticides sources in the percentage of S. littoralis
mortality. For the effect of the interaction between insecticides sources and
Soybean variety there was moderate significant variation in percentage of S.
littoralis mortality and repellent effect.
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Pages:100-103
How to cite this article:
Walaa A Tawfik, Ouda MI, Saleem A Alsalhee "Effect of using some chemical control methods and plant extract on response of three soybean genotypes to <i>Spodoptera littoralis</i> (Boisd) infestation, in Dakahlia Governorate, Egypt". International Journal of Agriculture and Plant Science, Vol 7, Issue 1, 2025, Pages 100-103
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