Influence of insecticides on the harvest and quality of potato stubs in the conditions of West Kazakhstan region

Abstract

The article presents the results on the yield of potatoes, on the starch content in the tubers, which determined a certain degree of damage to the tops of the Colorado potato beetle. The lowest yield was obtained in the control, and in the variants with the use of insecticides against the Colorado potato beetle, compared with the control, it increased in all experimental variants, depending on the chemical preparation used, in 2017 by 1.8-4.5 times, the lowest indicator by the variant with the preparation cytcor, in 2018 the yield showed a difference of 1.8-4.05 times, it was also the smallest on the variant with cytcor, in 2019 the yield increased 1.81-4.41 times and here the lowest indicator was also when using cytkor. Potato yield on average for 3 years with the use of insecticides in the fight against the Colorado potato beetle was obtained in the range of 12.6 - 16.9 t / ha in the variants of cytkor, aktara, akarin, confidor, bankol, kinmix. A high yield (25.4 t / ha) was obtained when potato plantings were treated with fastacprofi, 28.8 t / ha - in the variant using karate zeon and 29.6 t / ha when decis expert was used. The starch content in potato tubers in the control untreated variant was 10.1 - 10.3%, and in the variants with pesticides - 15.0 - 16.4%, or 4.9 - 6.1% more than in the control. Potato yield and starch content in tubers depend directly on damage to potato plants by the Colorado potato beetle.