Evaluation of plant extracts and plant essential oils against Sclerotium oryzae under in vivo conditions

Abstract

Stem rot caused by Sclerotium oryzae is one of the major diseases of rice and a serious threat to rice production in India. In order to determine the bio efficacy of the botanicals and plant essential oils an experiment was conducted with eight treatments during rabi 2017-18. Among them, lowest per cent disease index (PDI) was observed in T1 (39.62 PDI) followed by treatments T2 (43.38 PDI) and T4 (45.45 PDI) which were statistically at par with each other. While in T8 significantly higher stem rot disease was recorded with 60.20 PDI followed by T7 (54.68 PDI) which were statistically at par with each other but differed significantly with all other treatments. Highest grain yield was recorded in T1 (7.145t/ha) followed by T2 (5.882 t/ha). Lowest yield was observed in T8 (5.354t/ha). Whereas, highest straw yield was recorded in T1 (8.016t/ha) followed by T3 (6.48t/ha) and T4 (6.43t/ha) which were statistically at par with each other. Lowest yield was observed in T8 (5.7.07t/ha).