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The movement of non-flying insects that walk into agricultural fields from overwintering sites or neighboring fields may be restrained by trenches at the field borders. For example, migrating insects such as white fringed beetles (Graphognathus sp.) fall into the trenches and cannot climb out. They then can be destroyed by crushing or by applying kerosene (Chalfant et al. 1990). Trenches can be lined with plastic mulch to restrain the invasion of potato fields by overwintering, migrating Colorado potato beetles. The smooth lining of the plastic mulch decreases the likelihood of escape (Misener et al. 1993).
Chalfant, R.B., R.K. Jansson, D.R. Seal, and J.M. Schalk. 1990. Ecology and management of sweet potato insects. Ann. Rev. Entomol. 35: 157-180.
Misener, G.C., G. Boiteau, & L.P. McMillan. 1993. A plastic-lining trenching device for the control of Colorado potato beetle: Beetle Excluder. Am. Potato J. 70(12): 903-908.