Bio-efficacy of botanical and microbial pesticides against tetranychus urticae koch on okra in field condition https://doi.org/10.21276/AATCCReview.2025.13.04.305 Swetalin Gouda https://orcid.org/register Surendra Prasad https://orcid.org/0009-0004-1985-1312 Udit Kumar https://orcid.org/register A study was evaluated of various botanicals against two spotted spider mite on okra crop in Bihar during  summer 2022 and 2023. The combine effect of botanical and bio-pesticide against red spider mite shows best result  for Azadirachtin (50.30%), followed by NSKE (46.97%), Pongamia oil 2 EC (46.41%), Eucalyptus oil (41.80%),  neem oil (37.31%), Paecilomyces  fumosoroseus (29.93%) stood middle of the all treatment.Lecanicilium lecanii (13.77 %)shows less per cent reduction of mite population (29.35%). The maximum yield (87.53 q/ha) was obtained in the plots treated with Azadirachtin 0.12 EC followed by NSKE (85.34 q/ha). The minimum yield of (71 q/ha) was obtained in the plots treated with Lecanicilium lecanii. The maximum Benefit Cost Ratio was also calculated in Azadirachtin (3.33:1) followed by NSKE (3.28:1) and lowest Benefit Cost Ratio was observed in Lecanicilium lecanii (2.28:1).

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Original Research Article
Swetalin Gouda1 Surendra Prasad1 Udit Kumar2
1 Department of Entomology, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar, India
2 Department of Horticulture, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur, Bihar, India
https://doi.org/10.21276/AATCCReview.2025.13.04.305

Abstract

A study was evaluated of various botanicals against two spotted spider mite on okra crop in Bihar during  summer 2022 and 2023. The combine effect of botanical and bio-pesticide against red spider mite shows best result  for Azadirachtin (50.30%), followed by NSKE (46.97%), Pongamia oil 2 EC (46.41%), Eucalyptus oil (41.80%),  neem oil (37.31%), Paecilomyces  fumosoroseus (29.93%) stood middle of the all treatment.Lecanicilium lecanii (13.77 %)shows less per cent reduction of mite population (29.35%). The maximum yield (87.53 q/ha) was obtained in the plots treated with Azadirachtin 0.12 EC followed by NSKE (85.34 q/ha). The minimum yield of (71 q/ha) was obtained in the plots treated with Lecanicilium lecanii. The maximum Benefit Cost Ratio was also calculated in Azadirachtin (3.33:1) followed by NSKE (3.28:1) and lowest Benefit Cost Ratio was observed in Lecanicilium lecanii (2.28:1).

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