Abstract
This article analyzed the ecological succession between pests of crops as a result of the transition from the traditional cotton-alfalfa crop rotation system to the cotton-grain crop rotation system. It was found that the species composition, development and propagation characteristics of harmful organisms in the weeds around the field, as well as in the intermediate crops, can be reduced by up to 60-70%, and protected entomophagous organisms from the destructive effects of pesticides through lateral tillage of the 30-meter edge of the cotton crop. Furthermore, it was possible to apply biological methods to the remaining 70-80% of the field. It was necessary to properly organize the system of crop rotation “Cotton-grain” towards naturally controlling (reduce or eliminate) the number of harmful organisms (pests, diseases and weeds) in the agrophytocenosis. It was observed that diseases (especially rust), weeds (especially wild oats, raygras), pests (weeds, wheat thrips, slime,) were 2-3 times less in the grain planted after cotton, the number of spiders in the cotton field planted after grain were 3-4 times less, and diseases were decreased by 25-30%.
Highlights
One of the important factors for obtaining a quality abundant crop from agricultural crops is the protection of crop areas from pests, diseases and weeds
Only the chemical method was used, as it was effective in combating pests
In recent years, the emergence of resistant populations of pests in nature under the influence of pesticides and diseases has led to the disruption of the balance of the biological chain, the negative impact on biodiversity, such as a sharp increase in weeds, pests and disease
Summary
One of the important factors for obtaining a quality abundant crop from agricultural crops is the protection of crop areas from pests, diseases and weeds. It was identified that if agrotechnical measures (exchange planting, feeding, timely processing of land, irrigation in moderation, loss of plant residues) was done on time and qualitatively, the chemical method may not be left untouched [10,11,12]. Without this method, there is no way to get high efficiency from other methods. This research was aimed at developing and implementing innovative resource-saving methods of managing the number of harmful organisms of crops on the basis of a comprehensive survey of the changes taking place in crop rotation entomocenosis
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