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2005•Pesticide Research JournalRequires access

Acute toxicity of Different Insecticides against Helicoverpa armigera (Hubner) in Punjab

Nirmal Singh, Mahal

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Abstract

Five insecticides were tested for their relative toxicity against third instar larvae (30–50 mg) of Helicoverpa armigera (Hubner) on cotton using leaf disc dip bioassay technique. The LC50 values for spinosad, chlorpyriphos, endosulfan, acephate and cypermethrin were 0.4, 6.6, 80.4, 629.0, and 2087.0 µg ml−1, respectively, indicating that spinosad was highly effective followed by chlorpyriphos. Cypermethrin and acephate were ineffective in controlling H. armigera, whereas, endosulfan was intermediate in this respect.

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What this paper is about

Five insecticides were tested for their relative toxicity against third instar larvae (30–50 mg) of Helicoverpa armigera (Hubner) on cotton using leaf disc dip bioassay technique. The LC50 values for spinosad, chlorpyriphos, endosulfan, acephate and cypermethrin were 0.4, 6.6, 80.4, 629.0, and 2087.0 µg ml−1, respectively, indicating that spinosad was highly effective followed by chlorpyriphos. Cypermethrin and acephate were ineffective in controlling H. armigera, whereas, endosulfan was intermediate in this respect.

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Available abstract

Five insecticides were tested for their relative toxicity against third instar larvae (30–50 mg) of Helicoverpa armigera (Hubner) on cotton using leaf disc dip bioassay technique. The LC50 values for spinosad, chlorpyriphos, endosulfan, acephate and cypermethrin were 0.4, 6.6, 80.4, 629.0, and 2087.0 µg ml−1, respectively, indicating that spinosad was highly effective followed by chlorpyriphos. Cypermethrin and acephate were ineffective in controlling H. armigera, whereas, endosulfan was intermediate in this respect.

Key concepts: Helicoverpa armigera, Spinosad, Acephate, Endosulfan, Cypermethrin, Toxicology, Bioassay, Emamectin benzoate

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