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Indian Journal of Nematology
Year : 2011, Volume : 41, Issue : 1
First page : ( 29) Last page : ( 33)
Print ISSN : 0303-6960. Online ISSN : 0974-4444.

Bioefficacy of Pesticides Against Aphelenchoides besseyi and Sensitivity of Tuberose Bulbs to Hot-Water

Khan M.R.*, Ghosh Sekhar

Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Kalyani, Nadia-741235 (West Bengal), India.

*E-mail: mrkhanbckv@rediffmail.com

Online published on 12 April, 2012.

Received:  25  July,  2010; Accepted:  25  January,  2011.

Abstract

Bioefficacy tests with neem-based formulations on Aphelenchoides besseyi population infecting tuberose showed that azadirachtin at 1% and 5% was found nematicidal, caused 27% to 42% mortality after 2 h of exposure. Among synthetic pesticides tested, monocrotophos 36 SL showed killing to the extent of 41% while cartap hydrochloride 50WP and carbosulfan 25EC showed up to 14% killing effect at relatively higher concentration (0.2%) after 2 h of exposure. Among the formulations of pesticides tested against A. besseyi, none of synthetic chemicals was found promising except monocrotophos. The results on temperature sensitivity of tuberose bulbs to hot-water showed that bulbs were highly sensitive to the exposure of hot-water temperature and germination of tuberose bulb was not affected at temperature of 50± 20C for 30 min. but at 540C about 80% and at 580C to 600C, cent per cent germination of bubs was lost.

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Keywords

Bioefficacy, botanical pesticides, Azadirachtin, Aphelenchoides besseyi, tuberose, temperature sensitivity, bulbs.

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