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Pest Activity -- April 11, 2008Pest Activity > April 11 Welcome to the Woody Ornamental Pest Scouting Report for Western Pennsylvania brought to you by Penn State Cooperative Extension. This report is updated weekly with growing degree day counts and insect activity through the end of June. If you would like an email copy of this report, send your request to mcm2@psu.edu.As of April 9, the following growing degree days with a base temperature of 50 degrees have accumulated.
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There is a very short window for control of this pest in the spring. Any control measures should be applied before the adelgids cover their body with a white waxy secretion. |
Hemlock Rust Mite
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Eriophyid mites on hemlocks, Norway Spruce and Eastern White Pine are active at this time. A hand lens is usually required to identify these tiny pests. Labelled control measure for Pennsylvania can be found at the following two links: Hemlocks - - - - - - White Pine |
Spruce Spider Mites
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Overwintering reddish colored eggs were observed on hemlocks in the Pittsburgh and Wexford areas. No nymphs were present at this time. |
White Vine Weevil
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The sixty degree daytime temperatures we experienced this past week is warm enough to coax the adult pest of this native conifer out of its overwintering hiding places. When scouting, look for dots of resin along the terminal leader. This is an indication of the adult female feeding. |
The next scouting report will be on April 18.
