EVALUATION THE EFFECTIVENESS OF Trichogramma evanescens (WESTWOOD), Bacillus thuringiensis (BERL.) AND Beauveria Bassiana (BALS.) AS BIOLOGICAL CONTROL AGENTS FOR Ostrinie nubilalis (HUBNER) IN MAIZE FIELDS AT KAFR EL·SHEIKH DISTRICT.

Document Type : Original Article

Author

Plant Protection Research Institute, A.R.C. Giza, Egypt.

Abstract

The effectiveness of Trichogramma evenesc;;;ns. Bacillus Ihuringiensis and
8eauveria bessien« against Ostrinia nubila/is on ~ili maize plantations (duting a
period sxtended from July ;5°·· to Nov. 15"') in 2001 and 2002 at Kafr EI·Sheikh district
was tested by reler.slng Ihe egg·parasitoid. T. evenesceas (tYlO releases at a rate of
33000 parasitoids (retease/teddan at 7-day interval) applying with B. /huringiensiS var.
Kurslaki (dipel 2)( at a rale of 2.5 gmIL) and t~e fungus. B. bassiana at a rate of 5 x
107 conidia/mt. The mean percentages of infestation by O. nubila/is larvae at harvest
were 12.25% and 9.3% showing reduction in infeslation by 82.8 and 65.8%.
respectively when I. evanescens was used in two seasons 2001 and 2002, two
sprzyings of B. Ihuringiensis treatment led to 20.34 and 15.22% showing reduction in
infestation by 61.3 and 59.2%, whereas the mean percentages by Ihe fungus were
29.21 and 23.32% showing reduction in infestation by 32.72 and 34.03, respectively
as compared with control in 2001 and 2002.

Keywords

Journal of Plant Protection and Pathology
Volume 28, Issue 8
August 2003
Pages 6427-6435

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