Смена кормовых растений в цикле развития Aphis gossypii Glov. в условиях Харьковской области

Abstract

Our observations show that species Aphis gossypii Glov. in Kharkov region conditions prefers to hibernate on radical leaf rosette of plants Taraxacum officinale, Capsella bursa-pastoris, Malva neglecta, Plantago major or in kidney squamas of rootstocks of plants species Cirsium arvense, Cirsium vulgare, Sonchus oleraceus, Sonchus arvensis L. Change of food plants is connected with reaching certain of effective temperatures, increasing the number of specimen in colonies and worsening the regime of alimentation on plants that were occupied before. Factors which influence the degree of occupation and quantity of hatching larvas in colonies on cultured plants of gourd family are: weather-climatic conditions and their spatial closeness to natural biotypes of the given species of insects.