Vol. 12, Special Issue 12 (2023)

Author(s):
Vishnu Lal, PK Bhagat, GP Painkra, KL Painkra, Neha Bhuarya and Priti Singh

Abstract:
The present investigation entitled “To evaluate the efficacy of botanical insecticides viz.: Neem oil 0.5%, Castor oil 0.3%, Nilgiri oil 0.3%, Karanj oil 0.5%, Mahua oil and 0.5%, Azadirachtin 0.3% against Bihar hairy caterpillar, Spilosoma obliqua Walker in sunflower was carried out at Research-cum-Instructional Farm of Raj Mohini Devi College of Agriculture and Research Station, Ambikapur (C.G.) during kharif 2022. The result revealed that the minimum larval population of Bihar hairy caterpillar recorded from Neem oil 0.5% (2.51 larva/plant) followed by Azadirachtin 0.3% (2.62 larva/plant) which were significantly superior to rest of the treatments. Castor oil 0.3% (3.02 larva/plant), Nilgiri oil 0.3% (3.21 larva/plant) and Mahua oil 0.5% (3.23 larva/plant) were the next best treatment. However, Karanj oil 0.5% (4.05 larva/plant) was it least efficient in reducing the pest population. In order to efficacy of botanical insecticides, were Neem oil 0.5% followed by Azadirachtin 0.3%, Castor oil 0.3%, Nilgiri oil 0.3%, Mahua oil 0.5% and Karanj oil 0.5%.