Helicoverpa armigera distribution in gossypium varieties crop

A review of the biological development of the Helicoverpa armigera and its harmfulness on Gossypium varieties is given. Research results also showed that first-generation caterpillars mainly damage flower buds and young buds in the upper part of plants. The second generation causes damage by feeding on buds and flowers, and later (in subsequent generations) on not fully mature cotton bolls. In flowers, caterpillars eat out stamens and ovary, sometimes petals. Helicoverpa armigera are relatively rarely damaged, but the last (autumn) generation on Gossypium develops in small numbers and damages bolls. Such massive damage to various parts of Gossypium by these pests causes significant damage to cotton growing. The identified resistant lines, hybrids, and varieties can be used as primary genetic material for the creation of new Gossypium varieties.