Coleopterous pests of small-spread berries in Belarus

Abstract

It is determined that in Belarus in the European cranberry bush plantations among the coleopterous pests the most spread is the European cranberry bush beetle – Pyrrhalta viburni (Paykull), the number of which reaches 55 larvae on 2 m shoots. There difference in colonization by the European cranberry bush beetle of regionalized varieties has not been noticed. The phytophage number by years of researches has varied depending on predatory insects number (bug Himacerus apterus F. from fam. Nabidae and predatory mites from fam. Phytoseiidae). By ratio of hibernating predator and phytophage stages 1:4, the European cranberry bush number is 12 times decreased. In honeysuckle among coleopterous pests rose stem girdler (Agrilus coerulescens Ratz.) is spread, damaging 13,7–16,1 % of the crop shoots. In red chokeberry plantations among coleopterous the most noxious is service-tree blossom beetle – Anthonomus conspersus Desb.). Buds severity by the phytophage makes 1,2–5,5 %.