EFFECT OF SOWING DATE ON THE INCIDENCE AND SEVERITY OF POWDERY MILDEW OF PEA (PISUM SATIVUM L.)

摘要

Pea (Pisum sativum L.) was sown on four different dates, viz., 20 October, 5 and 21 November and 6 December in 1986-87 and 1987-88 in three replications to observe the occurrence and severity of powdery mildew caused by Erysiphe pisi DC. Twentieth October was the most suitable date of sowing as the infected plants, nodal leaves, compound leaves and area of infected compound leaves, were minimum in both the years, consequently seed and straw weight was maximum during this period. The maximum disease incidence resulting in low yields was on 6th December-sown crop.