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. | ||
| Journal of Plant Protection and Pathology | ||
| Article 4, Volume 28, Issue 8, August 2003, Pages 6427-6435 PDF (8.59 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jppp.2003.245235 | ||
| Author | ||
| M. M. Metwally, | ||
| 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 | ||
| Trichogramma evanescens; Bacillus /huringiensis; Beauveria bassiana; Ostrinia nubile/is | ||
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