Protecţia biologică cu entomofagul Trichogramma evanescens Westw. A culturii de soia de dăunătorul fluturele cărămiziu (Vanessa cardui L.)

Abstract

On the territory of the Republic of Moldova, in 2019 the intense flight was noticed of the butterflies of the specie Painted Lady (Vanessa cardui L.,1758) from the Nymphalidae family. As a result of the researches on soybean crop, during the development of the first generation, the amount of V. cardui L. eggs ranged from 61 to 2287 eggs per 200 plants per hectare. The average density per plant ranged from 1.0 to 13.0 eggs. Out of the total number of V. cardui eggs (6105) collected in soybean culture, after two launches with Trichogramma evanescens the number of parasitized eggs was 4400-72%. The launch norm of the entomophage pest control was 100.000 eggs/ha in the first release (05.06.20), and 300.000 eggs/ha of individuals (07.06.20) in the second release. In the control the entomophage did not launch.