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The Pine Needle Mite, a New Enemy of the Pines, Eriophyes Pini Nalepa Family Eriophyidae

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Abstract:

The above mite, found in the United States as far as known only at San Francisco and at San Diego, feeds within the basal sheath of the needle-cluster, Pinus radiata Don and P. torreyana Carr. being the recorded hosts. As a result of its work the affected needles are shed prematurely, and the annual repetition of this leafcast can not fail but weaken the trees, to the extent of shortening their life appreciably, besides apparently predisposing them to attacks by bark-beetles. Fortunately the pest seems to be able to spread but slowly, with consequent hope of its ultimate control. Spraying experiments have given some promise,—a 10 per cent miscible-oil- spray being indicated as most productive of results. Further work is needed to determine the best season of treatment and the number of applications necessary. Where possible, the removal of infested pines furnishes a prompt and effective remedy not to be approached by spraying.

Document Type: Research Article

Publication date: December 1, 1925

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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