Abstract
This article provides information on the effectiveness of successive application of herbicides chemical glyphosate (CG) (3 l/ha) and Himstop 330 (1.5 l/ha) against annual and perennial weeds in cotton fields. When Himstop 330 was used at a rate of 1.5 l/ha, the number of annual weeds was reduced by 84.6-90.4%. 14.5-17.9%. When CG 54% herbicide was applied at a rate of 3.0 l/ha, annuals were reduced by 16.5–19.4%, while perennials were reduced by 86.4–91.5%.CG, when applied in the fall at a rate of 3.0 l/ha, and Himstop 330, at a rate of 1.5 l/ha (in series) with the sowing of annual weeds 89.6-94.5%, perennials 88.2- Provides a loss of 92.6%.When CG was used separately at a rate of 3.0 l/ha and Himstop 330 at a rate of 1.5 l/ha, 3.25 q/ha more cotton was obtained than the control variant. CG (3.0 l/ha) and Himstop 330 (1.5 l/ha) herbicides when applied in series provide a high cotton yield of 5.2 q/ha per hectare.
Highlights
It is known that perennials such as Bermuda grass (Cynadon dactylon L.), Aleppo grass
In the herbicide-free control variant, 39.2 annuals and 4.75 perennial weeds were recorded per 1 m2 of land during the 1st accounting period (Table 2)
CCG had a weak effect on annual weeds when applied separately at a rate of 54% to 3.0 l/ha
Summary
It is known that perennials such as Bermuda grass (Cynadon dactylon L.), Aleppo grass Brot), field bindweed (Convolvulus arvensis L.), purple nutsedge (Cyperus rotundus L.), goosefoot (Cyhenopodium album L.), and annual weeds such as beauv (Echinochloa crus-galli L.), black nightshade (Solanum nigrum L.), purslane (Portulaca oleraceae L.) and redroot pigweed (Amarathus retraflexus) are common. Weeds belonging to different families will be adapted to grow under certain environmental conditions. The use of wheat-cotton crop rotation allows to reduce these weeds by drastically changing the growing conditions [3, 8, 11]
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