Evaluation of entomopathogenic fungi on some biological aspects of cotton leaf worm (Spodoptera Littoralis).

Hassan, Wessam Houssiny; Tantawy, Wafaa Ghatwary; Ghaly, Mohamed F

doi:10.21608/bfszu.2024.309621.1419

Evaluation of entomopathogenic fungi on some biological aspects of cotton leaf worm (Spodoptera Littoralis).

Document Type : Original Article

Authors

¹ Chemist

² Professor at Plant Protection Research Institute, Agricultural Research Center, Dokki, Egypt .

³ Professor of Botany and Microbiology Department, Faculty of Science, Zagazig University, Egypt.

10.21608/bfszu.2024.309621.1419

Abstract

This study aims to investigate the insecticidal effect of some entomopathogenic fungal isolates on some biological aspects of Spodoptera littoralis ( cotton leaf worm) to avoid the harmful impact of chemical insecticides on humans, animals, natural predators, and the whole environment. Ten fungi were isolated from the soil and their spore suspension was screened on the 2nd instar larval stage of the S. littoralis. Beauveria bassiana (isolate NO.9 ) gave the highest insecticidal effect on S.littoralis even the spore suspension or the filtrate. The S.littoralis biological aspects affected by the B.bassiana spore suspension and filtrate respectively as follows: the highest larval deformation(30%), (23.33%), the highest larval mortality (33.33%), (30%),the lowest pupation ratio(66.67%),(70%), the Pupal mortality (8.9%), (35.77%) the ratio of adult emergency was (91.07)&(57.57) and the both treatments show total injury as (40% and 60%). The selected fungal isolate (NO. 9) is characterized as white mold which seems to be Baeuveria bassiana.

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