Lilacs have bloomed and spirea is in bloom, so Pine Needle Scale eggs should be hatching. The first instar nymphs ("crawlers") are vulnerable now to sprays of horticultural oil, insecticidal soap, Diazinon, Orthene, Sevin, and other labeled insecticides.
This article originally appeared in the May 22, 1991 issue, p. 95.
|Prepared by Donald Lewis, Department of Entomology|
Iowa State University, Ames, Iowa.
This information subject to a usage policy.
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