Al fournier (Coordinator, IPM in Schools Program, Purdue University, Department of Entomology), Fred Whitford (Coordinator, Purdue Pesticide Programs, Purdue University Cooperative Extension Service), Timothy J. Gibb (IPM Specialist, Purdue University, Department of Entomology) and Christian Y. Oseto (Professor of Entomology, Purdue University, Entomology Department).
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Fournier et al. (2003) studied this question.
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