The article presents information on the distribution and biology of important invasive species in the vegetable-police fields in Central Fergana. Distribution and biology of important invasive species distributed in the conditions of Central Fergana in vegetable-melon crop fields were studied, and phenological calendars were developed. Development, reproduction, growth of invasive species Agriotes sputator (planting season clicker), Leptinotarsa decemlineata (Colorado potato beetle), Phthorimaea operculella (potato moth), Tuta absoluta (tomato moth) and Delia platura (onion fly) damage to plants and stages of development were analyzed.

The article describes the results of the spread of invasive pest insects that seriously affect the vegetable-police agrocenoses across Central Fergana. During the research, it was found that Colorado potato beetle (Leptinotarsa decemlineata), tomato moth (Tuta absoluta), mulberry moth (Glyphodes pyloalis) and onion fly (Delia platura) entered as adventive species and became dominant in the valley.

The article reveals the chemical composition of turnip: carbohydrates (glucose, fructose), pectins, vitamins. The products of polysaccharide hydrolysis were studied by paper chromatography