Experimental studies on predation: Predation and cyclamen-mite populations on strawberries in California

C. B. Huffaker and C. E. Kennett

Hilgardia, 1956, vol. 26, issue 4

Abstract: Typhlodromus Sp. is a specific predator of cyclamen mite, and its biology is closely correlated with that of its prey, on which its reproduction depends. It can, however, utilize honeydew and other liquid foods for survival during very low densities of the prey. At such low densities the strawberry plant provides maximum protection for the cyclamen mite; and this, together with spatial factors, insure that the pest will not be entirely eliminated by its predator. Under such circumstances, effective predation is not, as some ecologists have postulated, self-annihilative. Rather, the data indicate fairly regular, reciprocally dependent oscillations of predator and pest (prey) populations, with the pest held to economically unimportant levels. Predation may be superimposed over all other mortality causes.

Keywords: Environmental; Economics; and; Policy (search for similar items in EconPapers)
Date: 1956
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