The field experiment was conducted to evaluate “Bio-efficacy of different bio-pesticides in maize stem borer at Rajasthan college of Agriculture, Udaipur during Kharif 2018. The efficacy study revealed that all the treatments significantly reduced leaf injury and percent dead heart and increased grain yield over untreated check. The treatment, spinosad 35 % EC @ 0.3 ml/l was found effective with that minimum leaf injury rating (2.20) and percent dead heart (10.0) followed by Bt, NSKE 5%, Beauveria bassiana, Metarhizium and Azadiractin 1500 ppm 2%as compared to untreated control [7.90 (LIR) & 43.90 (percent dead heart)]. Similarly, spinosad 35 % EC gave significant result with the highest grain yield (42.00 Q/ha) followed by Bt, NSKE 5%, Beauveria bassiana, Metarhizium and Azadiractin 1500 ppm 2% as compared to untreated control (28.00 Q/ha).

Stem borer, Maize, Spinosad, Dead heart, Leaf Injury Rating, Beauveria, Cereal

The findings of this investigation revealed that the lowest leaf injury rating and percent dead heart (2.20 and 10 per cent, respectively) was observed with spinosad 35 % EC @ 0.3 ml/l treated plots followed by bt@ 5 g/l where leaf injury rating was 2.80 and percent dead heart was 13.33 observed. The highest leaf injury rating and percent dead heart (7.90 and 43.33, respectively) were found in untreated plots. Similarly, the highest grain yield (42.00 Q/ha) was observed with spinosad 35 % EC @ 0.3 ml/l treated plots followed by bt @ 5 g/l (39.00 Q/ha). The lowest grain yield (28.00 Q/ha) was found in untreated plots.

Gagandeep Singh, Amit Kumar, Vijay Kumar, Ashok Kumar Meena and Bhuvnesh Nagar (2023). Evaluation of Bio-efficacy of different bio-pesticides against Maize Stem Borer, Chilo partellus (Swinhoe) in Udaipur Region. Biological Forum – An International Journal, 15(8): 435-438.