Effect of various plant extracts against major insect pests and natural enemies in rice Oryza sativa L.

Seni, Atanu and Ahmed, Absar (2024) Effect of various plant extracts against major insect pests and natural enemies in rice Oryza sativa L. ACTA PHYTOPATHOLOGICA ET ENTOMOLOGICA HUNGARICA, 59 (2). pp. 197-214. ISSN 0238-1249

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Abstract

Extracts from Azadirachta indica, Lantana camara, Nerium oleander, Aegle marmelos, Allium sativum, Citrus limon were compared with two checks viz. Azadirachtin 1 EC and Acephate 95 SG for their efficacy against Nilaparvata lugens, Orseolia oryzae and natural enemies in cultivated rice during two consecutive wet seasons from 2022 to 2023. It was revealed that, mean rice yield was significantly higher in the A. indica and Acephate 95 SG treatments compared to the control. The A. indica treatment emerged as the best treatment against O. oryzae whereas, the A. marmelos treatment was found most promising against N. lugens. All the studied botanicals had less impact on natural enemies than synthetic chemical. The cost economics of major insect pests' management in rice revealed that Acephate 95 SG treatment recorded the highest Incremental Cost Benefit Ratio (1: 4.65) followed by A. indica (1: 3.74) and A. marmelos (1: 3.41).

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