Spittle-insect vectors of Pierce’s disease virus: I. Characters, distribution, and food plants

Henry H. P. Severin and Dwight M. DeLong

Hilgardia, 1950, vol. 19, issue 11

Abstract: The distribution of these four species is reported and their food and breeding plants in California are listed. Distinctive markings are described and illustrated for the following six color forms of Philaenus leucophthalmus, all occurring in California: var. leucophthalmus (Linnaeus); var. pallidus (Zetterstedt); var. fabricii Van Duzee; var. marginellus (Fabricius); var. spumarius (Fallen); and var. impressus n. var.

Keywords: Environmental; Economics; and; Policy (search for similar items in EconPapers)
Date: 1950
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