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The Effect of Temperature Upon Egg Deposition, Egg Hatch and Nymphal Development of Paratrioza cockerelli (Sulc)

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The entomologist, and in general the layman, accepts the fact that low winter temperatures are often a determining factor in the abundance and distribution of many economic species of insects, but apparently few in the North, especially, give much thought to a possible retarding influence of summer temperatures. Several years of field observations of the psyllid, Paratrioza cockerelli (Sulc), the most serious pest of tomatoes and potatoes in Colorado, indicate that this species is especially affected by summer temperatures and may be considered a low-temperature species. This is indicated by the rather intermittent outbreaks that occur in certain localities, the seriousness of the pest in the cool, high mountain areas and its frequent, almost complete, disappearance during the hotter part of the summer from some of the warmer areas.

Document Type: Research Article

Publication date: February 1, 1939

More about this publication?
  • 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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