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U. K. Kadam ¹, P. R. Palande ¹, V. R. Shelar ¹, G. M. Bansode ¹

Affiliations
1 Seed Technology Research Unit, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar, M.S., IN

Abstract

The experiment was conducted at Seed Technology Research Unit, Mahatma Phule Krishi Vidyapeeth, Rahuri, Maharashtra during 2009 to 2012 on chickpea with an objective to ascertain new insecticidal chemical against Callosobruchus chinensis, a major pests of stored chickpea seed. The observation on germination and insect infestation were recorded at interval of three months of storage period. Among different insecticides, deltamethrin 2.8 EC @ 0.04 ml/kg or lufenuron 5 EC @ 0.1 ml/kg or emamectin benzoate 5SG @ 40 mg/kg of seed were found equally effective for control of stored grain pest of chickpea and maintained the chickpea seed germination above minimum seed certification standard (85%) upto 9 months of storage.

Keywords

Storage, Chickpea, Callosobruchus Chinensis

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P. R. Palande ¹, D. S. Pokharkar ¹

Affiliations
1 Department of Entomology, College of Agriculture, Pune, 411 005, Maharashtra, IN

Abstract

Laboratory studies on parasitizing efficiency of Trichogmmmatoidea bactrae Nagaraja and bioassay of Bacillus thuringiensis Berliner, and field evaluation of these bioagaents alone and in combination were carried out against diamondback moth, Plutella xylostella (Linnaeus) on cabbage. The results indicated that the parasitism of T. bactrae was higher in the eggs of Corcyra cephalonica Stainton (91.36%) than P. xylostella (82.46%) while the adult emergence was more from parasitized eggs of P. xylostella (92.16%) than C. cephalonica (91.40%). The estimated LC₅₀ value of B. thuringiensis formulation Dipel 8L was 0.043 per cent. Field studies revealed that inundative releases of T. bactrae @50,000 adults/ha/release five times at weekly interval with two intermittent sprays of B. thuringiensis @ 1 litre/ha at 10 days interval commencing from 30 days after transplanting of cabbage resulted in minimum of 0.45 mean surviving larvae of DBM with 84.16 per cent reduction in larval number and maximum yield of 380.2 q/ha marketable cabbage heads, and proved to be the most effective.

Keywords

Bacillus thuringiensis, Cabbage, Corcyra cephalonica, Plutella xylostella, Trichogrammatoidea bactrae.

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