EFFICIENCY OF CERTAIN PLANT POWDERS AGAINST THE COWPEA WEEVIL CALLOSOBRUCHUS MACULATUS (F.) (COLEOPTERA: BRUCHIDAE)

Document Type : Original Article

Authors

Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt

Abstract

Three different plant powders, i.e. banana leaves, turmeric rhi‌zomes and dill leaves were studied as repellents and for their biological effects on the adults of Callosobruchus maculatus (F.) when added to cowpea seeds as surface treatment at 4% w/w level_ After 1 day of ex‌posure, banana powder was found to be a very good repellent, it has the highest repellency factor (-89) representing 96% of the insects avoiding it. Turmeric and dill powders, also strongly repelled the insects after the first day. Thereafter, repellency of all powders decreased but was more rapidly with banana powder than turmeric and dill. Egg production of the newly emerged adults exposed to all test‌ed powders, highly decreased than control. Banana powder was superior in this respect, and its significant reduction effect continued up to 4 weeks. Percentage of hatchability of produced eggs was significantly re‌duced, but turmeric powder was superior in this respect. Moreover, its effectiveness continued up to 4 weeks, then lowered but still effective. All the tested powders greatly and significantly reduced the per‌centage of Fl emergence. Turmeric powder was the most effective powder in protecting the cowpea seeds against the insect infestation. The bioresidual activity of all tested powders continucd up to 6 weeks after storage but with slightly lower rates (averaged between 0.78 and 0.9) as compared with initial treatment.

Keywords

Files

Share

How to cite

Statistics