Pest Activity -- April 26, 2002

Pest Activity > Pest Activity Archives > April 26, 2002

Welcome to the Woody Ornamental Pest Scouting Report for Western Pennsylvania for April 26, 2002, 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 24, the following growing degree days with a base temperature of 50 degrees have accumulated:

Uniontown	262	Franklin	131
New Stanton	237	Meadville	187
Pittsburgh	256	Erie	164
Wexford	211	Fairview	131
Prospect	179	Harbor Creek	115
Mercer	167

This past week brought heavy frosts to many areas of western Pennsylvania and we paid the price for the extremely warm temperatures earlier in Spring. Frost damage was observed on ash, maples and honeylocust in a few areas.

Young aphids were observed on River Birch this past week in Westmoreland County.

Spruce Spider Mites have hatched with limited activity in Western Pennsylvania at this time.

Baldcypress Rust Mites continue to be active in western Pennsylvania.

The young nymphs of both Honeylocust Plant Bugs and Honeylocust Spider Mite were observed on the new growth of honeylocust .

Birch Leafminers adults continue to lay eggs in many areas in western Pennsylvania. Some of the warmer sites may also have young larvae beginning to mine the leaves at this time.

Boxwood Psyllid nymphs continue to feed on boxwoods. The feeding activity of this pest causes the cupping of the terminal leaves on boxwoods and treatment should be applied now before the nymphs become adults

Pine Spittlebug nymphs can be found on white and Scotch pines at this time.

Southern Red Mites are active on Japanese Hollies at this time.

Eastern Tent Caterpillar are active with tents up to 4 inches wide and larvae up to 3/8" long .

European Pine Sawfly are active and 3/8 inch long larvae were observed feeding on their preferred host plants, Scotch, Japanese Red and Mugho Pines.

Spruce Rust Mites and Hemlock Rust Mites remain active on Spruce and Hemlocks in Western Pennsylvania at this time.

Cooley Spruce Gall Adelgid in Westmoreland County were covered with white waxy strands, and have begun egg laying at this time.

 

The next scouting report will be on Friday, May 3rd.