PESTICIDES ASSESSMENT AND PEST RESISTANCE DOSE DETERMINATION

By
Ujjawal Kumar Singh Kushwaha
Department of Plant Pathology
Institute of Agriculture and Animal Science, Rampur, Chitwan, (Tribhuvan University) Nepal
Email: - kush_ujjwal@yahoo.com; kushujjwal@gmail.com
Abstract
Ramban is well known for vegetables production in Sarlahi district. Farmers grow vegetables for market purposes and for self consumption. A survey was done to assess pest impacts and pest resistance dose determination. Three replications were taken. Among them; two replications i.e. Farmers Field School (FFS) and Non Farmers Field School (NFFS) in Ramban VDC and the other (Control) in Belba Jabdi VDC. Each replication contained 25 treatment. Only 24% farmers used protection measures in FFS, 8% in NFFS and 0% in Control during spraying. FFS farmer’s average doses were 2ml/L and 1.5ml/L in NFFS and Control. It may be due to lack of knowledge and lack of farmer’s trainings. Pesticides dose may vary depending on crop diseases and pests severity. It was evident that 0.5 ml/L pesticides had no effect on pests and diseases. Above 3ml/L; pests, insects and pathogens become resistance to pesticides when this dose continued more than thrice in the field in the same crop. Most severe problems reported were fruit borer and fusarium rot in Ramban and Belba Jabdi VDC respectively. Thus optimum dose of pesticides should be applied so as to balance agroecosystem and to reduce pest resistance.

Keywords:-
Pesticide, dose, pest, farmer and resistance
(This abstract (page 149) is published in International Conference on Biodiversity, Livelihood and Climate change,12-14 December 2010, Kathmandu, Nepal)

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