Weeds from fields planted with tomatoes

The composition of weed species in tomato fields in Kibray district of Tashkent region was studied. The dominant species of weeds, the degree of contamination and the number per 1m2 of land were determined. The most common weed species are shown. According to the results of the study, weeds were found in the fields planted with tomatoes, mainly belonging to 28 species. Of these, the most common in 1 m2 area is 25-40 % in Amaranthus retroflexus L., Echinochloa crus-galli (L.) Beaw. 6-33 % per 1 m2, Chenopodium album L. was found to be 19-25 % per 1 m2, Cyperus rotundus L. and Xanthium strumariumL. were found to be 4-5 % per 1 m2. Of the weed species found in the study areas, 11 % are perennial weeds. The presence of perennial weeds in fields planted with tomatoes indicates the presence of perennial weeds in the same field before the tomatoes were planted. Therefore, it is necessary to pay attention to additional agro-technical measures in clearing the area from perennial rhizomes, rhizomes, bulbs, tubers. Perennial weeds are found everywhere in vegetable-grown fields, mostlyin small separate places, and if they are not eradicated in a timely manner in these areas, they multiply slowly and spread throughout the field. It has been stated that the widespread use of crop rotation in vegetable growing poses certain difficulties in identifying weed species specific to each crop type