The Kinetics of Insecticide Action. Part V: Deterministic Models to Simulate the Movement of Pesticide from Discrete Deposits and to Predict Optimum Deposit Characteristics on Leaf Surfaces for Control of Sedentary Crop Pests
✍ Scribed by Salt, David W.; Ford, Martyn G.
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 934 KB
- Volume
- 48
- Category
- Article
- ISSN
- 1526-498X
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✦ Synopsis
Mathematical models have been used to identify combinations of deposit size, density and concentration which result in effective control of sedentary crop pests using minimal amounts of insecticide. A model based on point source diffusion gave an adequate description of the spread of biocidal areas around deposits with time; the more complex disc source model gave similar results. The point source model has been developed further to investigate how pesticide inputs might be reduced while maintaining adequate control. Models based on the cumulative effects of toxicant with time gave marginally better fits in the tails of the tolerance distribution. Prediction of LN,, values using a model which takes account of overlapping biocidal areas was in reasonable agreement with experimental results. Models which have been developed to investigate the factors which affect the control of sedentary crop pests by insecticides and acaricides may also be used to predict optimal spray patterns for contact herbicides and fungicides.