Pest Activity -- May 14
Pest Activity
> May 14
Welcome to the Woody Ornamental Pest Scouting Report for Western Pennsylvania
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 May 12,
the following growing degree days with a base temperature of 50 degrees
have accumulated.
| Uniontown |
xx |
Mercer |
262
|
| New Stanton |
364 |
Franklin |
273
|
| Pittsburgh |
411 |
Meadville |
292
|
| Wexford |
293 |
Erie |
238 |
| Butler |
235 |
Harbor Creek |
307
|
Pest Activity
Azalea Lace Bug
 |
Feeding activity was observed in Westmoreland County this past week.
|
Fact
Sheet
|
Boxwood Psyllid
Eastern Tent Caterpillar
 |
Tents are 6-10 inches wide and the caterpillars are 1" or larger in many parts of Allegheny County, BT is not a viable control on larvae 1" in length or greater.
|
Fact
Sheet
|
Fourlined Plant Bug
 |
Nymphs of the four lined plantbug were observed on forsythia and several species of perennials this past week in Allegheny County.
|
Fact
Sheet
|
Hemlock Rust Mite
Honeylocust Plant Bug
 |
Damage from early spring feeding is clearly evident at this time.
|
Fact
Sheet
|
Pieris Lacebug
 |
Activity was observed in Allegheny, Beaver, abd Butler counties.
|
Fact
Sheet
|
Pine Needle Scale
 |
The first crawlers of the pine needle scale were observed this past week in Pittsburgh.
|
Fact
Sheet
|
Southern Red Mites
Spruce Spider Mites
 |
Polulations are increasing and some webbing was observed on hemlocks in Allegheny county.
|
Fact
Sheet
|
Other Insects
 |
Early symptoms of oak leaf blister are showing up on pin and red oaks at this time. This disease does not cause early defoliation and control measures are not recommended. |
Fact Sheet
|
 |
Ash plant bug damage was observed in Westmoreland County and later instar nymphs were observed. The nymphs have changed from a bright red color to brown and green. |
|
 |
Hawthorn leafminer larvae in Pittsburgh have left their mines to pupate in the soil, while larvae in northern Allegheny and Butler counties are still active. Fall applications of imidacloprid have been effective for control of this pest the following year. |
|
The next scouting report will be on May 21 .
