SOME PLANT-LICE AFFECTING PEAS, CLOVER, AND LETTUCE
- 1 February 1901
- journal article
- Published by Cambridge University Press (CUP) in The Canadian Entomologist
- Vol. 33 (2) , 31-39
- https://doi.org/10.4039/ent3331-2
Abstract
The “Green Dolphin” is one of the best-Known pests of peas and vetches in Europe, though but little concerning its economy has been recorded by European writers. In this country, N. pisi, Kalt., has been noted by Thomas, Oestlund, and Williams, but as their specimens were never compared with any from Europe, and as plant-lice are exceedingly variable and descriptions of them are, therefore, often of but little value even when accurate, the identity of their specimens with the European forms has been somewhat in doubt.Keywords
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