Title

Estimating Weed and Insect Development, In-Season Yield Losses, and Economic Thresholds

Document Type

Book Chapter

Publication Date

2017

Abstract

This chapter discusses and demonstrates how to estimate the impact of weed and insect pests on yield losses and how to calculate economic thresholds. Techniques for converting pest population into anticipated yield loss are discussed. The models used calculate yield losses and economic thresholds are pest specific, with the economic threshold, the point where the cost of the control equals the estimated cost of yield loss. For weeds, a hyperbolic model is used to estimate how weed density impacts crop yields. For weeds and insect development, growing degrees have been used to assess phenological development. Examples are provided.

Publication Title

Practical Mathematics for Precision Farming

DOI of Published Version

10.2134/practicalmath2017.0106

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