Density and damages of apple sawfly (Hoplocampa testudinea Klug) in three technology of growing

Vilina Petrova

Abstract: The apple sawfly is economically important pest of apple in the region of Kyustendil. It was found that its density during the period 2009 – 2012 increased from 57.8 to 162.4 number of axles per catch, the lowest was in 2009 and the highest in 2012. The young fruits damaged by apple sawfly were the most in the integrated technology and “mined” fruits in the biological technology. The damage reported during the harvesting was "mined" fruits by the apple sawfly, which were with low quality. The highest percentage of such “mined” fruits was reported in biological technology. The cultivar Prima had the relatively highest percentage damaged young fruits in the three technologies of growing and the most "mined" fruits by apple sawfly was in cultivar Florina.

Keywords: apple; apple production; apple sawfly; plant protection systems

Date published: 2017-08-09