METHOD FOR CONTROLLING NUMBER AND HARMFULNESS OF CABBAGE ROOT FLIES

摘要

A method for controlling the number and hamfulness of the cabbage root flies such that prior to planting seedlings into an unprotected area keeping the root system in a 0.5 % aqueous solution of the preparation Aktara 25WG w.g. (water-soluble granules) is conducted in the course of 2-2.5 hours. In addition, in the period of mass egg-laying and appearance of larvae of the cabbage root flies, double settling of the predator Aleochara (Aleochara bilineata Gyll) is carried with an interval 8-10 days. A settling rate is 150 and 200 imagoes per 100 m, in addition settling is carried out in at least 15 points over an area of 100 m.