Influences of certain insecticides, i.e. abamectin, Primiphos methyl Bemistop, Trigard and
pyriproxyfen versus releasing the ectoparasitoid, Diglyphus isaea were evaluated to estimate their effectiveness
for controlling the leaf miner liriomyza trifolii (Burgess) infesting Phaseolus vulgaris grown under field and
glass house conditions. Results indicated that all treatments caused decreased in the tested pest's and
Diglyphus isaea populations in both applications. Highest reduction values in L. trifolii population occurred
after 1 and 2 applications of Trigard (87.2 & 81.0%) followed by Actellic (68.6 &75.8%), V st nd ertimec (67.5 &75.3
%) and Admiral (60.5 & 66.2 %). While the low effect was shown after treatment by Bemistop (54.9 &57.1 %).
In case of releasing Diglyphus isaea in the green house, data showed that in order to obtain satisfactory
control of Phaseolus vulgaris, weekly releases of the parasitoid are needed and that the rates of 4/30 and 2/30
(parasite / larvae) proved as best rates for release. Therefore, D. isaea can be considered a good promised
control element especially in successful release of some IPM programs of Phaseolus vulgaris grown under
glass house conditions. |
