Vol. 11, Issue 12 (2022)

The powdery mildew disease of pea caused by Erysiphe pisi, has emerged as a serious problem in most of the pea growing area of India, leading to considerable yield loss in pea production. Symptoms of powdery mildew appeared on upper surface of leaves, pods and on stem. The intensive survey was conducted at the reproductive stage to record the disease incidence of powdery mildew in major pea growing blocks of Ranchi district during rabi 2021-2022. On an average 30.00% disease incidence recorded in Ranchi district. Among the different blocks, highest disease incidence recorded 34.00% in Mandar block and lowest reported 26.00% in Bero block, Ranchi. Field level management of powdery mildew of pea using botanicals were evaluated during Rabi 2021-2022. Percent disease incidence (PDI) was low 17.50 percent, when sprayed of neem leaf extract (10%), followed by Lantana camara leaf extract 45.00 percent, Eucalyptus leaf extract 47.50 percent and Marigold leaf extract 57.50 percent. Microscopic observation after 24 hr, 48 hr, and 72 hr. of botanicals spray revealed that 10% neem leaf extract found to be highly effective against powdery mildew pathogen and affects conidia, conidiophore and hyphae of fungus.