Pest Activity -- April 23
Pest Activity
> April 23
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 April 21, the following growing degree days with a base temperature
of 50 degrees have accumulated.
| Uniontown |
151
|
Mercer |
98
|
| New Stanton |
139
|
Franklin |
xx
|
| Pittsburgh |
131
|
Meadville |
109
|
| Wexford |
109
|
Erie |
78
|
| Butler |
91
|
Harbor Creek |
106
|
Pest Activity
Boxwood Psyllid
 |
Boxwood psyllids were active in Pittsburgh this past week and
their feeding has started to cause the characteristic cupping
of the terminals on the new growth on both common boxwood, Buxus
sempervirens, littleleaf boxwood, Buxus microphylla, and the
hybrids, Buxus microphylla var. koreana x Buxus sempervirens.
|
Fact
Sheet
|
Cooley Spruce Gall
 |
Cooley spruce gall adelgids
are completely covered with white waxy strands, closing the window
where insecticides are effective for their control. The next window
of opportunity will be in late September- early October. |
Fact
Sheet
|
Eastern Tent Caterpillar
 |
Tents in Allegheny County are 3-4 inched across and can still
be managed by physical removal or with the use of an insecticide
labeled for their control in Pennsylvania.
|
Fact
Sheet
|
Hemlock Rust Mite
 |
This eriophyid mite also remains active.
|
Fact
Sheet
|
Southern Red Mites
 |
Southern red mites were active on Ilex crenata in Pittsburgh
this past week. They were observed on Ilex crenata, one of their
favorite host plants.
|
Fact
Sheet
|
Spruce Spider Mites
 |
Spruce spider mites have hatched and are active on hemlock
in Pittsburgh.
|
Fact
Sheet
|
White Vine Weevil
 |
White pine weevil egg laying has started. If this pest was
a problem last year and you have not applied a spray application
this spring, you can apply a spray now to catch any late egg
laying activity but should also check for dying and dead terminals
in June and prune out and burn any infested leaders at that
time.
|
Fact
Sheet
|
Elongate Hemlock Scale
 |
The crawlers of elongate hemlock scale should be hatching soon.
The scale will cover itself with white waxy excrements that
some people mistakenly identify as hemlock wooly adeldid. This
pest is very difficult to control because the crawler hatch
occurs over a long period of time and one insecticide application
will not provide adequate control.
|
|
|
The next scouting report will be on April 30 .
