International Journal of Plant Protection

Md. Ilyas ¹, G. S. Vidhate ¹, T. B. Ugale ², G. S. Kamte ²

Affiliations
1 Department of Agricultural Entomology, Marathwada Agricultural University, Parbhani M.S., IN
2 Department of Entomology, K.K. Wagh College of Agriculture, Nashik M.S., IN

Abstract

An experiment was conducted to evaluate the performance of bivoltine mulberry silkworm (Bombyx mori L.) hybrids under Marathwada conditions at Sericulture Research Unit, Marathwada Agricultural University, Parbhani during October-November, 2008. The bi x bi hybrid CSR16 x CSR17 was found significantly superior with hatching percentage of 95.22. Maximum larval weight (45.08 g), maximum single cocoon weight (1.98 g), single shell weight (0.393 g), filament length (950 m), cocoon yield/10000 larvae brushed (18.55 kg), effective rate of rearing (96.33 per cent), whereas significantly superiority in less larval duration and shelling percentage was found in bi x bi hybrid CSR 18 x CSR 19 (22.65 days) and CSR 48 x CSR 4 (20.98 per cent), respectively. The multi x bi hybrid PM x CSR2 recorded significantly less disease incidence. Based on overall performance it can be concluded that the bivoltine hybrid CSR16 x CSR17 reared on mulberry variety V-1 was the most suitable and economical for rearing under Marathwada conditions

Keywords

V-1, Bombyx Mori L, Bivoltine Hybrid, Larval Weight, Filament Length, Hatching Percentage

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U. A. Pawar ¹, P. S. Chintkuntalawar ¹, T. B. Ugale ²

Affiliations
1 Department of Agricultural Entomology, K.k. Wagh College of Agriculture, Nashik (m.s.), IN
2 Department of Agricultural Entomology, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur (m.p.), IN

Abstract

A field experiment was conducted at experimental field of Department of Entomology, Live Stock Farm, Adhartal, J.N. Krishi Vishwa Vidyalaya, Jabalpur (M.P.) during Kharif season 2009-2010. Thirteen different species of insects and one insectivorus bird species were recorded on the pigeonpea at Jabalpur during 2009-2010. Data collected reveled that fauna belonging to seven orders and fourteen families were associated with the pigeonpea crop. The first group of insects included jassid, leaf webber, tussock caterpillar and red pumpkin beetle which appeared when the crop age was about 39 days old i.e. during vegetative stage and remained available upto the reproductive stage. The next group of insects to appear on the crop were jassid, thrips, blister beetle, pod bug, gram pod borer, pod fly, green stink bug and red gram plume moth. These appeared when the crop age was about 102 days old i.e. at the reproductive stage and remained available upto the maturity of the crop. These pests were the major key pests which caused colossal yield losses. The natural enemies observed were lady bird beetle and a parasitic wasp Cotessia(= Apanteles)sp. which remained active from vegetative to reproductive stage of the crop. An insectivorous bird, black drongo was also observed to feed on different stages of insect pests infesting pigeonpea during the entire crop growth period.

Keywords

Pigeonpea, Key Pest, Predator, Insectivorous Bird

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