TRICHOGRAMMA ENTOMOPHAGE IN INTEGRATED PLANT PROTECTION AS MEANS TO REDUCE PESTS’ POPULATION DENSITY CROPS IN REPUBLIC OF MOLDOVA
LIDIA GAVRILITSA Institute of Genetics, Physiology of Plant Protection of the Academy of Science of Moldova, Chişinău, str. Pădurii 20, e-mail: lidia_gavrilita@yahoo.com.
During 2006-2014, average biological efficacy after 4 and respectively 4-6 launches with Trichogramma evanescens Westw. on annual crops (such as cabbage, corn, tomatoes, peas, sugar beet and soybean) varied in the first variant from 74% to 90.0%, whereas in the second variant varied from 60 to 81%. Pest attack on the researched agricultural crops varied from 2% to 10%, after Trichogramma launching. In the untreated field, the same index varied from 16% to 90%. During the period 2011-2012, research studies with Trichogramma embryophagum Htg. it was applied on plum cultures in AGRO BRIO farm from rep. Moldova on a surface of 10.8 hectares against the pest Grapholitha funebrana TR. In the plum orchard, there were performed 6 launches with T. embryophagum. 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%. During the 2002 to 2009 years on apple culture the T. embryophagum average efficacy in field after 4-6 treatments varied in the first variant from 74 to 90%, in the second though efficacy varied from 60 to 81%
