Vol. 11, Issue 11 (2022)

The present study “Effect of organic on powdery mildew of pea (Erysiphe pisi)” was carried out during March, 2021-22 to study organic management against powdery mildew of pea. The incidence of powdery mildew in different blocks of Ranchi ranged between 10 to 70 percentages, whereas the average DI% of the district was around 29.2%. In block wise, DI% was highest in Tamar (38%) followed by Ormanjhi (34%), Angara (32%), Nagri (24%) and Kanke (18%). Microscopic observation revealed that the mycelium were entophytic hyaline septate. The bio- efficiency of four treatments T1 (Butter milk 10%), T2 (Turmeric extract 10%), T3 (Garlic extract 10%), T4 (Chirata leaf extract 10%) and T5 as a control against powdery mildew of pea was evaluated during-2022. The result indicated that the percent disease incidence was low (6.25%) and significantly superior over all the treatments, when the T3 (Garlic extract 10%) used as spray at weekly interval after 43 days of sowing followed by T2 (Turmeric extract 10%) 22.5 percent, T1 (Butter milk 10%) 27.5 percent and T4 (Chirata leaf extract 10%) 50 percent. After 48 hours of spray, microscopic observation of powdery mildew revealed that botanical (Garlic extract) showing better result compare to other organic.