METHOD TO CONTROL SPREADING AND HAZARD OF INTRASTEM PHYTOPHAGES OF BERRY-FIELDS

摘要

A method to control spreading and harmfulness of intrastem phytophages of berry-fields comprises settling the phytophage egg parasite Trichogramma onto bushes. In the period of the beginning of mass laying of females of phytophages two techniques of joint settling are carried out at a ratio of 2:1 of egg parasites, Trichogramma, of the species Trichogramma dendrolimi Mats. and Coccidencirtus (Coccidencirtus pinicola Mert.). In addition, in the period of the beginning of rebirth of caterpillars and larvae intrastem phytophages, two techniques of spraying bushes with an aqueous solution of the preparation Phytoverm 0.2 % e.c. (an emulsion concentrate) in an equivalent of 1.2 l/ha and Aegerin a.s. (an aqueous solution), in equivalent of 1.5 l/ha, are carried out, in doing so, the interval between spraying operations is 5-6 days. Furthermore, in the period of appearance of caterpillars and larvae of phytophages of elder ages, one technique of settling a laboratory culture of the ectoparasite Habrobracon (Habrobracon hebetor Say.) onto bushes is carried out in an equivalent of 13-15 imagos per bush.