Динамика накопления калия в листьях огурцов на фоне обработок биофунгицидом на базе бикарбоната калия

Abstract

Investigations were conducted under greenhouse conditions to evaluate the effects of potassium bicarbonate (PB) on powdery mildew of cucumber caused by E. cichoracearum. PB of two concentrations was applied as foliar sprays to cucumber and K content of the leaf samples was determined by AAC. In the greenhouse, PB provided significant control of powdery mildew with fungal isolates, reducing disease levels by up to 67 %. Higher disease pressure reduced the efficacy of PB on powdery mildew but did not affect the content of the K in leaves. Application of KHCO3 increased the level of K in the leaves, which was responsible for the suppression of the disease.