UA53170U - Method for limiting numbers of lepidopterous pests in hop plantations - Google Patents

Abstract

A method for limiting the numbers of lepidopterous pests in hop plantations includes artificial settling laboratory cultures of entomophages onto plants. Gathering the diapausing stages of lepidopterous pests, in particular caterpillars and pupae, is carried out in hop agrocenoses prior to the beginning of spring reactivation. In addition, the level of vital activity thereof is determined, and if part of viable populations is 70% and more, two settlings of the parasite of eggs of lepidopterous pests, in particular of Trichogramma of the species Trichogramma pintoi Voeg., are carried out in an equivalent of 80 and 90 thousand females per 1 ha. In addition, in the period of the beginning of rebirth of caterpillars of the pests spraying of hop plants with an aqueous solution of the preparation Lepidocid is carried out in an equivalent of 1.5 kg/ha. Furthermore, in the period of appearance of caterpillars of the elder ages on the plants two techniques of settling the ectoparasite Habrobracon (Habrobracon hebetor Say.) onto plants are carried out with an interval of 7-8 days in an equivalent of 450 and 500 females per 1 ha.