Abstract
The use of a composite defoliant in various norms of Bukhara-8 cotton in the Bukhara region is considered. Identified from 10 options that had a positive impact on the efficiency of defoliation, productivity were - (Mg (ClO3)2liq. 4 l/ha + Fitovak 75 ml/ha + Urea 6.5 + Humin-1.5 kg/ha). The weight of the bolls, the weight of the 1st collection, the gross yield were higher with the control, the standards were respectively heavier by: 0.7-0.9-0.8 g and 4.5-3.7-2.8 c/ha; 5.9-2.2-3.1 q/ha yield increase. The defoliant rate was reduced by 50%, the accumulation of Cl-, MgCl2 salts in the soil, air up to 50%, the ecological environment was saved from damage to the ozone layer Cl- by a certain amount, which affected air pollution. Boll burns under the action of the composite defoliant were not observed, due to the formation of a conductive layer between the leaf and stem, which activates the endohormone triggers contained in Fitovak in plants. The flow of nutrients into the stem to the bolls, bypassing the leaf, through the stem leads to an increase in the mass of the 1st, entire crop and the rate of opening of the bolls.
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