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VOL. 9, ISSUE 9 (2024)
Controlling of Spodoptera frugiperda (JE. Smith) using biological compounds exposed to gamma rays and economic evaluation of maize crop
Authors
Mona I Ammar, Soheir F Abd El-Rahman, Hammam NM, Reda AM Amer, Yacoub Sh S
Abstract
Several biotic compounds, including Bacillus thuringiensis
(Kurs.), Emamectin benzoate, and Spinosad exposed or not exposed to gamma ray
at doses (120 & 480 Gy), were used in a field experiment conducted in the
El-Ayat region of Giza province to increase their toxicity to the Fall
armyworm, Spodoptera frugiperda (Smith). In the field trial,
concentrations of 1/2 (T1), 1/4 (T2), 1/8 (T3), and 1/16 (T4) of the biotic
recommended dosages were utilized. For the purpose of assessing S.
frugiperda management, larval population reduction was employed. The maize
crop's economic assessment as a result of various treatments was also
estimated. The S. frugiperda larval population was significantly reduced
by half of the recommended dose of the compounds utilized, and this was
followed by treatments of 1/4, 1/8, and 1/16 of the indicated doses. The
results showed that the highest reduction in the number of S. frugiperda
larvae on corn plants occurred in the Emamectin benzoate +480 Gy treatment;
Meanwhile, B. thuringiensis not exposed to gamma rays gave the least
reduction in larval numbers. Economic evaluation parameters of maize crop acts
in productivity (kg), total costs (pounds), total revenue (pounds), net return
(pounds), cost benefit ratio, margin over variable costs, pounds on return,
added value and reduction in yield. The best yield result was obtained from
corn treated with composites exposed to a gamma dose of 120 Gy in Spinosad +120
Gy, followed by Emamectin Benzoate +120 Gy and B. Thuringiensis +120
Gray with half the recommended dose. Thus, gamma ray doses can enhance the
compounds to give a sufficient S. frugiperda larval population reduction
percentages with 1/2 recommended dose than other treatments. Also, gamma doses,
especially 120 Gy potentiates the compounds used (B. thuringiensis,
Emamectin benzoate & Spinosad) to give the highly economic evaluation
parameters of maize crop.
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Pages:101-111
How to cite this article:
Mona I Ammar, Soheir F Abd El-Rahman, Hammam NM, Reda AM Amer, Yacoub Sh S "Controlling of <i>Spodoptera frugiperda</i> (JE. Smith) using biological compounds exposed to gamma rays and economic evaluation of maize crop". International Journal of Entomology Research, Vol 9, Issue 9, 2024, Pages 101-111
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