Cockroach infestation (IMAGE)
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A common variety of consumer insecticide sprays is of "little to no value" in eliminating cockroach infestations, according to a new study published August 14 in the Journal of Economic Entomology. Residual insecticides are sprayed on surfaces where cockroaches are likely to appear, exposing them to the toxic ingredient when they contact the surface later. But laboratory testing at the University of Kentucky and Auburn University shows the residues have little effect on German cockroaches (Blattella germanica), a primary species infesting homes and buildings around the world. Here, an infestation is revealed on the back of a home appliance.
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Zach DeVries, Ph.D.
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