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Slide 5 of 17


The model, and the economic analysis based on it does not take into account the potential increased loss to lygus bugs and other pests the longer it takes to pollinate the alfalfa crop. Nor does it consider the costs of controlling increased pests during this time, including the risk of killing more bees. In the future the impact of lygus bugs on seed yield should be incorporated into the model to better understand the alleged advantage of rapid pollination for minimizing lygus damage. This was an idea first suggested by Mayer and Johansen (1991. Integrated insect control practices. In Alfalfa Seed Production and Pest Management. Western Regional Extension Publ. 12)

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