Efficiency of agrotechnical and chemical measures in control of weeds in onion (Allium cepa L.) fields

¹ Samarkand Agroinnovations and Research University, Samarkand, 191200, Uzbekistan
² National Research University "Tashkent Institute of Irrigation and Agricultural Mechanization Engineers", Tashkent, 100000, Uzbekistan
³ Tashkent State Agrarian University, Tashkent, 100140, Uzbekistan.

^* Corresponding author: s.isaev@tiiame.uz

Abstract

In the scientific article, in the study of the efficiency of agrotechnical and chemical control measures against weeds in the maintenance of onion (Allium cepa L.) seedlings in the meadow gray soils of the Samarkand province, when the soil is plowed to a depth of 30-35 cm using a two-layer tube in the fall, 18-22 cm to the soil surface (plowing) soil density decreased by 0.06-0.09 g/cm3 in the tilled 0-30 cm layer compared to the treated options. porosity increased by 1.4%. water permeability was higher by 80.2-82.4 m3. When the soil is plowed to a depth of 30-35 cm, Select 120 KE herbicide is applied at the rates of 0.5-1.0 l/ha in the maintenance of onion seedlings (3-4 ginseng period), one-year weeds are 85.2-93.9 and 84.1 by -96.7%, perennials 67.7-81.4; 69.2-83.9% destroyed. It is stated that the phytosanitary conditions of the cultivated area will be improved, and the yield of commercial onions will be 73.6-74.4 tons/ha and high quality.