IMPACT OF PESTICIDES USE ON TRUE SPIDER POPULATION IN TOMATO FARMS IN FAYOUM GOVERNORATE

Document Type : Research articles.

Author

Plant Protection Dept. Fac. of Agric. Fayoum Univ. Egypt.

Abstract

Eighteen species of spiders in six families were collected from
tomato fields in Fayoum governorate. Population of these spiders
reached up to 25 indiv./10 plants at the end of season (Nov.) in plots
with no chemical treatment. The correlation between spiders
population and
Nesidicoris tenuis Reut (Hemiptera) the main prey in
untreated plots was significantly negative. Admiral (pyriproxyfen),
Actacron (profenofos) and Pilarmate (methomyl), the three pesticides
recommended for use against tomato pests caused highly significant
reduction in spider populations. Pilarmate was the highest toxic to
spiders followed by Actacron and the least was Admiral with
reduction percentages of 85, 83 and 70%, respectively.


Keywords