Abstract
During the period 2011-2012, research studies with Trichogramma embryophagum Htg..were conducted in laboratory conditions and in the field. There were determined different biological indices of T. embryophagum; then, it was applied on plum cultures in AGRO BRIO farm from rep. Moldova on a surface of 5.4 hectares against the pest Grapholitha funebrana TR. In the plum orchard, there were performed 6 launches with T. embryophagumma. During the development of two generations of the plum moth (G. funebrana ), it was determined the dynamics of pest eggs laying and there were constructed digital maps of the spatial distribution of eggs of G. funebrana Tr. in the field, as well as the biological efficacy of T. embryophagum. which varied from 66.6% up to 75.0%. The entomophagous Trichogramma embryophagum Htg. is one of the most important biological agents which may be utilized against a complex of pests both in biological control, and in the system of integrated plant protection. The utilization of the eggs of Sitotroga cerealella OLIV. irradiated preliminary by gamma rays essentially increases Trichogramma biological indices and the efficiency in the field. Biological efficiency of T. embryophagum and the degree of damage in the first version (on irradiated eggs of grain moth) when compared with the second option (on the nonirradiated eggs) are significantly different.