ECOLOGO-FAUNISTIC ANALYSIS OF DELETERIOUS ENTOMOFAUNA OF PEA AGROCOENOSIS (on the ehample of Northern Fergana)
Keywords:
pea, agrocenosis, pest, phytophage, polyphage, oligophage, entomofauna, dominant.Abstract
There have been identified 44 species of insects belonging to 7 groups, 21 families and 36 genera causing damage to the pea crop in the conditions of Northern Fergana. Among the harmful entomofauna, representatives of Coleoptera (14 species, 31.8% of species in the entomofauna), orthoptera (10 species - 22.7%), Lepidoptera (8 species - 18.2%) are leading in terms of total abundance, while the genera Thysanoptera and Diptera differed their monotypicity (1 species - 2.3%). Also average representatives of the orders Homoptera (6 species - 13.6%) and Hemiptera (4 species - 9.1%). Heliothis peltigera (Denis & Schiffermüller, 1775)and Loxostege sticticalis (Linnaeus, 1761)were first identified for the fauna of the Ferghana Valley.
In the deleterious entomofauna, according to the degree of occurrence, insects are massive (5 species - 11.3%), common (22 species - 50%), rare (9 species - 20.4%), random (8 species - 18.1%). 34 species of insects are polyphages, and 10 species are oligophages, and according to food specialization, they are rhizophages, phyllophages, holophages, carpophages. Some species have a wide range of food specializations.
The dominant pest species are Lygus pratensis, Helicoverpa armigera, Agrotis segetum, Sitona cylindricollis, Callosobruchus maculatus, Liriomyza cicerina.
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