INFLUENCE OF CHEMICAL AND BIOLOGICAL PREPARATIONS ON PRODUCTIVITY, INCIDENCE OF PLANTS AND TUBERS OF POTATOES WITH RHIZOCTONOISE

Abstract

The results of studies on the effect of fungicides and biologics against Rhizoctonia solani in the Kamchatka Territory are presented. The integrated plant protection system is effective with the inclusion of biological preparations, combining the ability to simultaneously increase plant resistance to diseases and abiotic stresses, as well as activate growth processes. In the fight against rhizoctoniosis, joint treatment of potato tubers with the fungicide TMTD and spraying of plants with biological preparations Sporobacterin and Trichocin is effective, the degree of development of rhizoctoniosis was 3.4 and 2.1 %, the prevalence of the disease was 12.5 and 8.5 %, which is lower than the control without treatments by an average of 14.3%, 51.1 %, the lesion of sprouts decreased by 1.1%, tubers - by 3.9 %. The proposed method of potato protection provided a significant increase in yield to the control by 4.2 and 4.0 t/ha (17.2 and 16.4 %), commercial tubers increased by 7.9 and 10.9 %, the mass of commercial tubers - by 4.4 and 5.4 g, vitamin C - by 3.57 and 2.84 mg% compared with the control. The biological efficiency of the drugs was 83.6 %.