ISHS Acta Horticulturae 369: Symposium on Small Scale vegetable production and Horticultural Economics in Developing Countries
FARMERS PRACTICES FOR CHEMICAL PEST/DISEASE-CONTROL IN SHALLOT |
| Authors: | . , J.S. Buurma |
| Abstract:
Knowledge of farmers' practices is very important for the planning of research and extension. Such knowledge enables researchers and extensionists to directly focus on tackling wrong or dubious practices. This especially applies for pesticide application in vegetable production, because of the danger of residues for consumers. Pesticide use in shallot parcels was monitored in the dry season (May/June 1990) and the wet season (Jan/Feb 1991). Infection pressure differs between the dry and wet season. During the dry season farmers face big problems with insect pests and during the wet season they have to fight fungal diseases. Analysis of pesticide monitoring data shows, that farmers adjust pesticide use to the season. This especially applies for insecticides of which the expenses (Rp/ha) in the dry season are about five times as high as in the wet season. Apparently the farmers already apply a kind of threshold spraying. The task for research and extension is now to improve/refine this system. | |
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