Infestation of cabbage white with Apanteles glomeratus in the Zeravshan Valley

¹ Samarkand State University named after Sharof Rashidov, Samarkand, Uzbekistan
² Uzbek-Finnish Pedagogical Institute, Samarkand, Uzbekistan

^* Corresponding author: balikulov87@gmail.com

Abstract

The cabbage white butterfly (Pieris brassicae) is a dominant species among cabbage pests, and the role of natural enemies in regulating the population of this pest is quite large. Two species of parasite were found on the larvae of the cabbage white butterfly - Apanteles glomeratus L. and Eulophus larvarum (L), and one species of pupae - Pteromalus puparum (Linnaeus, 1758). Infestation of larvae with the parasite Eulophus larvarum was 1.9%, and infestation of pupae with Pteromalus puparum was 9.1%. The most effective parasite is Apanteles glomeratus, infesting from 34.6% to 42.1% of larvae. Infestation of larvae of different generations of the cabbage white butterfly with parasites varies significantly. The lowest degree of infestation was noted in the larvae of the first generation - 12.0–17.3%. During the growing season, the effectiveness of the parasite gradually increases and the highest degree of infection of the pest larvae is observed in the 5th generation larvae - 51.5–60.0%. From one infected pest larva, an average of 17.5 parasite larvae emerged. The survival rate of Apanteles glomeratus pupae was 80.8%.