Abstract:
Host preferences of the parasitoid species Trissolcus semistriatus Nees obtained from different
eggs was studied under laboratory conditions. Eggs of Eurygaster integriceps (Put.), Dolycoris
baccarum (L.), Aelia rostrata (Boh.) and, Eurydema ornata (L.) were offered to T. semistriatus
According to the results of parasitized eggs, E. integriceps eggs were most preferred followed
by D. baccarum eggs and then A. rostrata eggs. The least preference was detected on E. ornatum
eggs. In stepwise multiple regression analysis, the independent variable was the parasitism rate;
and the dependent variable was species T. semistriatus. The interaction between parasitism rate
and host eggs species was significant. Significant correlation of eggs species (r = 0.538, r
2 =
2.90, n = 160, P = 0.000) was found, whereas there was insignificant correlation of T.
semistriatus obtained from different eggs (r = 0.93, r
2 = 0.010, n = 160, P = 0.916). |
