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2001•Pesticide Research JournalRequires access

Field Efficacy of Neem-based Insecticides against Whitefly and their Impact on Insect Pest Complex of Cotton

Gagandeep Singh Mann, G. S. Dhaliwal, A. K. Dhawan

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Abstract

Neem Azal and Rakshak Gold at 2 1 ha−1 required only 4 sprays during 48 d of economic damage period of Bemisia tabaci (Gennadius) and their effect persisted for 6–12 d to suppress B. tabaci below economic threshold level (ETL). The population of Aphis gossypii Glover, Amrasca biguttula (Ishida) and bollworm damage also remained at low level at higher dose of neem-based insecticide treatments. However, three ETL-based sprays of triazophos targeted mainly against B. tabaci lead to significant increase in aphid population as compared to control. Minimum boll damage and higher seed cotton yield was recorded in triazophos-treated plots, which was statistically at par with NeemAzal and RakshakGold (a) 2 1 ha−1

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What this paper is about

Neem Azal and Rakshak Gold at 2 1 ha−1 required only 4 sprays during 48 d of economic damage period of Bemisia tabaci (Gennadius) and their effect persisted for 6–12 d to suppress B. tabaci below economic threshold level (ETL). The population of Aphis gossypii Glover, Amrasca biguttula (Ishida) and bollworm damage also remained at low level at higher dose of neem-based insecticide treatments. However, three ETL-based sprays of triazophos targeted mainly against B. tabaci lead to significant increase in aphid population as compared to control. Minimum boll damage and higher seed cotton yield was recorded in triazophos-treated plots, which was statistically at par with NeemAzal and RakshakGold (a) 2 1 ha−1

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Available abstract

Neem Azal and Rakshak Gold at 2 1 ha−1 required only 4 sprays during 48 d of economic damage period of Bemisia tabaci (Gennadius) and their effect persisted for 6–12 d to suppress B. tabaci below economic threshold level (ETL). The population of Aphis gossypii Glover, Amrasca biguttula (Ishida) and bollworm damage also remained at low level at higher dose of neem-based insecticide treatments. However, three ETL-based sprays of triazophos targeted mainly against B. tabaci lead to significant increase in aphid population as compared to control. Minimum boll damage and higher seed cotton yield was recorded in triazophos-treated plots, which was statistically at par with NeemAzal and RakshakGold (a) 2 1 ha−1

Key concepts: Aphis gossypii, Whitefly, Aphid, Pink bollworm, Toxicology, Population, Bollworm, Biology

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Field Efficacy of Neem-based Insecticides against Whitefly and their Impact on Insect Pest Complex of Cotton — Research Paper | ScholarLens