Biological effectiveness of using insecticides (Regent-800, Actara, Confidor) against colorado potato beetle under conditions of the Rostov oblast

摘要

Compared with insecticides Actara and Confidor, Regent-800 demonstrated the greatest effectiveness against the Colorado potato beetle. In the Rostov oblast the Colorado beetle causes substantial harm to potatoes: its numbers ranges from 6–8 to 15 beetles/plant. Such a considerable number of pests is due to the high prolificacy of females and possibility of the development of three generations. Furthermore, the main growing areas in the region (more than 90%) are concentrated in the private sec tor; therefore, protective measures are carried out irregularly, with violation of treatment technology, and potatoes are almost completely destroyed [1]. In recent years, preparations with other mechanisms of toxic action (Regent, Actara, Confidor, etc.) have joined the list of agents protecting plants from the Col orado beetle in place of organochlorine and organo phosphorus preparations and pyrethroid insecticides (Decis, Karate, Sherpa, etc.) [2, 3].