Pest Activity -- April 11, 2003

Pest Activity > Pest Activity Archives > April 11, 2003

Welcome to the Woody Ornamental Pest Scouting Report for Western Pennsylvania for April 11 brought to you by Penn State Cooperative Extension.This message will be 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:

Uniontown	216	Franklin
New Stanton	125	Meadville	69
Pittsburgh	135	Erie	45
Wexford	93	Mercer	95
Prospect	40	Harbor Creek	38

New or Recent Activity

Eastern Tent Caterpillars are slowly maturing with tents in Westmoreland and Allegheny counties approaching 2-4 inches in length and the early instar larvae are 1/4" long.

Hemlock Rust Mites remain active in Southwestern Pennsylvania at this time.

Over 90% of the Cooley Spruce Gall Adelgids observed this week on Douglas-fir in Westmoreland County are covered white waxy strands that make pesticide controls less effective. If you used imidacloprid (Marathon or Merit) to control the adelgids, be sure to monitor during late spring and early summer and then again in the fall for outbreaks of spruce spider mites.

White Pine Weevils continue to feed on the terminals of Eastern White Pines in Westmoreland County.

European Pine Sawfly eggs in Westmoreland County have swelled and should be hatching this week withpredicted daytime highs in the mid to upper 70's.

Overwintering Southern Red Mite eggs should also be hatching in the near furure.

Inkberry Leafminer adults should also be arriving on the scene in the next couple of weeks if the seasonably warm temperatures continue.

The next scouting report will be on Friday, April 18.