THE INFLUENCE OF PLANTING DATES AND DOSES OF FERTILIZERS ON THE INFECTION OF POTATO SPROUTS WITH RHISOCTONIA SOLANI KUHN AND MISCELLANEUS ROT TYPES

R V Ilchuk,L A Ilchuk

doi:10.35868/1997-3004.19.68-72

Abstract

The infection of potato planting material depends on the planting timing, doses of fertilizers and maturity groups of varieties. The largest (2.8–3.7 %) amount of tubers infected with Phisoctonia Solani Kuhn was observed in the variants with early planting dates. At late planting the reduced tubers infection with the black scab was observed, along with the increased moldering of planting tubers from 0.4 % to 7.2 % especially for early maturing varieties. Higher tubers infection (2.2–2.6 %) with black scab was noticed in variants with manure application (40 t/ha). Application of mineral fertilizers on manure background had resulted in the decrease of black scab infection of tubers by 0.8–0.9 %.

Highlights

The determination of optimal timing for potato planting was studied in numerous researches
Vasylieva [6], early planting of early-season varieties contributed to a significant increase of productivity, whereas at early planting of middle-late potato varieties the yield, on the contrary, decreased
Bordukova [9; 10] found that manure application increased and fertilizers application – significantly reduced the number of tubers affected by common scab

Summary

Introduction

N. Vasylieva [6], early planting of early-season varieties contributed to a significant increase of productivity, whereas at early planting of middle-late potato varieties the yield, on the contrary, decreased. The study of biological features of varieties as for different fertilizer standards shows that between the varieties of different maturity groups, and in the maturity group there is a difference in the optimal levels of nutrition. In this regard, the most efficient and cost-effective dose of fertilizer is that supplies a separate variety within the standards and ratios of mineral nutrition [11; 12]. The objective of the work was to establish optimal conditions for potato growing, which would increase yields, reduced thin plantings and their lesion with diseases

Objectives

Findings

Methods