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Efficacy of Plant Dusts, Oils and Indigenous Materials against Stored Pulse Beetle Callosobruchus chinensis L.

Sarswati Neupane1*, Resham Bahadur Thapa2, Yubak Dhoj GC3, Suroj Pokhrel4, Punya Prasad Regmi5, Subash Subedi1 and Arjun Upadhya2

1National Maize Research Program, Rampur, Nepal
2Institute of Agriculture and Animal Sciences, Tribhuvan University (TU), Kathmandu, Nepal
3Department of Agriculture, Kathmandu, Nepal
4Ministry of Agriculture Development, Kathmandu, Nepal
5Youth and Small Entrepreneur Self Employment Fund, Ministry of Finance, Kathmandu, Nepal
*Corresponding authorís email: sarusanu@yahoo.com <mailto:sarusanu@yahoo.com>
The experiments were conducted to study the efficacy of plant dusts, oils and indigenous materials against pulse beetle (Callosobruchus chinensis L.) on mungbean (Vigna radiata L. Wilczek) seeds at the laboratory of Grain Legumes Research program, Rampur, Chitwan. The botanicals Timur (Zanthoxylum armatum DC), Camphor balls (Cinnamomum camphora L.), Tobacco (Nicotiana tabacum L.), Black peeper (Piper longum L.) were dried under shade, to avoid loss of active ingredients, until the moisture content was completely removed from those materials. Well-dried botanical materials were made in powder form using grinder machine. Similarly, plant derived oils Neem oil (Azadirachta indica A. Juss), Soybean oil (Glycine max L. Merr), Mustard oil (Brassica juncea L.), Coconut oil (Cocos nucifera L.) and Sesame oil (Sesamum indicum L.) were purchased from market. Ten pairs of adults were transferred to each plastic bottle with perforated lead of capacity 1 kg containing 300 g botanicals (dust and oils) treated seeds using brush. The total numbers of treatments were 11 including one control following completely randomized design with four replications. The concentration of plant dust and plant oil was maintained 2g/kg and 5ml/kg of seed respectively during the treatment of seed. The efficacy was evaluated by considering total number of adult emergence, final weight, percent weight loss, germination percentage and moisture percentage of mungbean seeds up to 9 month of storage. Among botanicals tested, camphor and tobacco dust @ 2 g/kg of seed from powder form and plant oils- neem, sesamum and soybean, respectively @ 5 ml/kg of seed can be explored as excellent alternative over the poisonous pesticide for the management of C. chinensis L. in storage of mungbean and other pulses. The extracts of camphor and neem seed had no adverse effects on seed germination up to nine months of storage.
Int. J. Grad. Res. Rev. 2(1): 13-20
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