Risk Efficient Action Thresholds for Nematode Management
- Craig D. Osteen*,
- L. Joe Moffitt and
- A. W. Johnson
Economic thresholds are often important components of pest management strategies. An action threshold is the minimum pest population to which a fixed dosage of a pesticide is applied. While the fixed dosage will maximize profits for only one pest infestation level, the dosage will be applied to any infestation level greater than the action threshold. This paper describes the procedure for developing the economically efficient combination of action threshold and fixed pesticide dosage. The procedure addresses the variety of pest infestations to be treated by including a probability distribution for pest infestation. Since that introduces variability of profits, a measure of risk preference which accounts for the producer's willingness to accept lower average profits to reduce the changes of a large financial loss is incorporated. The procedures are described graphically and then applied to the control of lesion nematodes (Pratylenchus spp.) infesting field corn (Zea mays L.) in Coastal Plain soils. In this example, pesticide dosage, threshold, and expected nematicide use increase as the measure of risk-aversion increases.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 1988. . Copyright © 1988 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, 5585 Guilford Rd., Madison, WI 53711 USA