The side-effect of six insecticides get to be used on apple trees in Syria were
tested on the adults of the egg parasitoid Trichogramma cacoeciae Marchal.
Using the exposure of adults to treatment glass plates for 24 hours. The highest
recommended
field application rate was applied. The classification of the
International Organization for Biological Control for insecticides effect in
adults mortality or reducing of parasitism was used (1, Harmless; 2, slightly
harmful; 3, moderately harmful; 4, harmless). This study showed that
Cloropyrifos, Deltamethrin and Acetamiprid and caused adults mortality
100%, and classified as harmful insecticides (glass 4) according to IOBC. While
Diflubenzuron, lufenuron and fenoxycarb were slightly harmful in adults
mortality (class 2) according to IOBC. Whereas was harmful to larval stage
only, and moderately harmful to the egg and pupae. Acetamiprid was also
harmful to the egg stage and moderately harmful to larvae and pupae. Whereas
the insect growth regulator insecticides and the insect growth inhibitors
(Diflubenzuron, Lufenuron and Fenoxycarb) caused reducing in parasitism
(82.05, 56.03, 94.40)% for the three insecticides respectively, and classified
(class 2, 2, 3) respectively according IOBC category compared with the
parasitism in control 89.25%, also the latest three insecticides reduced
significantly the longevity of adults which were survived after the exposure to
treatment class plate compared with the control.