Pest Activity -- April 21, 2006

Pest Activity > April 21, 2006

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 21, the following growing degree days with a base temperature of 50 degrees have accumulated.

Uniontown	148
New Stanton	151
Pittsburgh	159
Wexford
Butler	77

Pest Activity

Boxwood Psyllid

Boxwood psyllid nymphs remain active in Pittsburgh this week A soil drench of imidacloprid at this time can likely eliminate the prospect of having leafminer damage for the next season by killing the next generation of leafmining larvae as they hatch in another 3-4 weeks. Be sure to pull back any mulch around the bases of the boxwoods to be treated since pouring the imidacloprid mix onto the mulch will result in the pesticide being bound to the mulch and not taken up by the roots.

Fact Sheet

Eastern Tent Caterpillar

	The tents are 4-6" across and the larvae are 3/8" to 1/2" long at this time in the city of Pittsburgh.
Fact Sheet

European Sawfly

	Overwintering eggs observed last week in the New Stanton area were swelled up and should be hatching very soon with the above average temperatures we are experiencing.
Fact Sheet

Hemlock Rust Mite

	Hemlock Rust mite, not considered a true spider mite, but rather an eriophyid mite, are active on hemlocks at this time in southwest Pennsylvania
Fact Sheet

Honeylocust Plant Bug

	Young honeylocust plant bug nymphs have hatched and and have started to feed on honeylocust in the city of Pittsburgh.
Fact Sheet

Spruce Spider Mites

	Spruce spider mites are active in Pittsburgh at this time. Hemlocks, arborvitae, Dwarf Alberta Spruce, true firs, and junipers are
Fact Sheet

White Vine Weevil

	Evidence of adult feeding was observed in New Stanton last week. Formulations of Bifenthrin are labelled for control of this pest. The treatment should only be applied to the top terminal growth of Eastern White Pines, Norway Spruce, Colorado Blue Spruce, and Oriental Spruce that exhibited top dieback from white pine weevil last year.
Fact Sheet

The next scouting report will be on April 29, 2006 .