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VOL. 9, ISSUE 8 (2024)
The efficacy of some insecticides against fall Armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae), in maize fields
Authors
Mohamed Fathy Abdel Aziz, Hayam M Saad, E A M Mousa
Abstract
Field experiments were conducted in Kafr
El-Sheikh Governorate - Egypt during 2022 and 2023 seasons to study five
insecticides namely chlorfenapyr, indoxacarb, methomyl, emamectin benzoate
and chlorantraniliprole against Fall armyworm, Spodoptera frugiperda in Maize
fields as well as the infestation and damage on maize.
Also, Lab experiments was evaluated the toxicity of tested insecticides. The
results displayed that, under lab condition the emamectin
benzoate insecticide was more toxicity with LC50 values 0.089 and
0.464ppm for second and fourth larval instar, respectively. The
infestation was minimal when treated with emamectin
benzoate in both seasons as the general reduction of FAW larvae reached 71.5
and 73.2% in the 2022 and 2023 season, respectively. the
initial effect (after one day of treatment), was maximum effect against FAW
larvae, with the reduction percentage being more than 90% compared to the days
following the test after application in both seasons. In season 2022, the cob
damage percentage in all treatments was decrease compare than untreated and
that the percentage of damage ranged between 22 – 35% and grain yield was
similar in the case of treatment with the two compounds emamectin benzoate and
chlorantraniliprole and was the highest compared to the other tested
insecticides were 2100.0 and 2062.5 kg/feddan. Also, In 2023 season, cob damage percentage in all
treatments was decrease compare than untreated, and that the percentage of
damage ranged between 20 – 30%, and the lowest cob damage percentage was
recorded in the treatment with chlorantraniliprole insecticide with value 20%
and grain yield was 1912.5 kg/feddan while indoxacarb insecticide had the
highest percentage cob damage and methomyl gave the lowest grain yield was 1800.0 kg/feddan.
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Pages:175-179
How to cite this article:
Mohamed Fathy Abdel Aziz, Hayam M Saad, E A M Mousa "The efficacy of some insecticides against fall Armyworm, <i>Spodoptera frugiperda </i>(Lepidoptera: Noctuidae), in maize fields". International Journal of Entomology Research, Vol 9, Issue 8, 2024, Pages 175-179
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