Computer-based cotton pest management in Australia

Abstract A prototype pest management system for cotton incorporating data handling and decision making by computer was progressively modified during 1978 and 1979 to increase its efficacy and practical feasibility. A more realistic assessment of crop status was developed. Threshold population densities of pests were revised. Labour requirements were reduced by sequentially sampling insects on terminals three times a week and by simulation of fruit development during week-long intervals between plant sampling. Decision making was refined using recent experience. The developing system, tested in 1978–1979 on a 14 ha field and in 1979–1980 on 360 ha of cotton grown on four farms, maintained yields at commercial levels although insecticide usage was decreased by 40%.