Impact of certain materials againist thrips tabaci lind. (thysanoptera: thripidae) in onion fields in Qalyubia governorate.

EL-SAPPAGH, I. A.; E.F. , GAZIA; A.E.H.,KHALIL and B. A., BADRAN

Abstract

To reduce the numbers of thrips and comparison using some chemical pesticides and other non-chemical materials, field studies were carried out to assaying the effectiveness of those materials against nymphs and adults of Thrips tabaci on onion in the Qalyubia governorate during 2014/2015 and 2015/2016 seasons. The results showed that chemical insecticide (Radiant 12%) gave high reductions being 95.1% and 89.5% during the first season while, these were 87.1 and 81.6% during the second season for nymphs and adults of onion thrips, respectively. On the other hand, chemical insecticides Lannate 90, Mospilan and some non-chemical materials such as Garlic and Parsley oil and Chinafill 100 showed intermediate effects against nymphs and adults. The insect growth inhibitor (Admiral) showed a weak impact on nymphs and adults of onion thrips as 14.9& 14.3% for 1st season and 45& 34.9% in the second one for adults and nymphs, respectively. In all cases, the difference between the percentages of reduction for Radiant 12% and Lannate 90 was non-significant during the first season of study while, there was a clear significant difference between both Radiant 12% and the other tested compounds during the second season. Also, the obtained results show that, there were no significant differences between reductions by the remaining tested compounds.

Key words

Onion thrips, Thr ips tabaci Lind., chemical insecticides, non-chemical insecticides.