Efficacy of local entomopathogenic nematodes against pieris brassicae (l., 1758) (lepidoptera: pieridae)

Pieris brassicae (L., 1758) (Lepidoptera: Pieridae) is considered one of the main pests of cabbage crops; The article describes the use of local entomopathogenic nematodes (EPNs) (S.thesami, S.tbilisiense, S. borjomiense, S. gurgistana and Heterorhabditis sp.) against P. brassicae in laboratory conditions. These nematodes were first used for cabbage pests. The tests were carried out with different doses of a suspension of each species of nematode (100, 50 and 25 nematodes against one insect). As a result of the experiments, it was found that all the above-mentioned nematodes have a rather high efficacy against P. brassicae not only high (100), but also using medium (50) doses. When using 4 local species of Steinernema EPN (S. thesami, S. tbilisiense, S. borjomiense, and S. gurgistana) against the P. brassicae nematodes S. thesami showed the highest results (96.6%); the remaining three species showed the same effect against insect (93.3%); among the local EPNs used against P. brassicae, Heterorhabditis sp. was the most effective. Pest mortality caused by its nematodes was 97.5%.