Disclaimer Statement                                                          Information on:   Insects | Weeds | Cultural | Diseases

Images of Common Insect Pests (images were provided by The Pennsylvania Department of Agriculture)

back | continue

Ants

Ants

Bagworm

	Needle damage caused by first instar bagworm feeding on spruce needles		1st instar bagworm feeding on spruce needles
	Overwintering eggs of bagworm inside previous year female case.

Balsam Twig Aphid

	Recently deposited overwintering egg of balsam twig aphid.		Female (stem mother) preparing to deposit live young on bud
	Overwintering egg of balsam twig aphid		2nd generation feeding on new growth
	Winged adult of balsam twig aphid		Female (stem mother) preparing to deposit live young on bud

Cinara aphid

Winged Cinara aphid on Scotch pine

Cooley Spruce Gall Adelgid

	Cooley nymphs feeding in new growth of Colorado spruce		1st instar adelgids on Douglas-fir needles (spring)
	Stem mother and egg mass on spruce (spring)		Overwintering nymphs on Douglas-fir needles
	Nymph of cooley on spruce		Mature gall on spruce opened to show chambers where adelgids mature
	Overwintering nymph on Colorado spruce (winter)		Cooley adelgid damage to needles of Douglas-fir (summer)
	Overwintering nymph on Colorado spruce (spring)

Cryptomeria Scale

	Crawler		Immature scales
	Crawlers on female covering		Settled crawler
	Female scale insect (covering removed)

Eastern (Northern) Pine Weevil

Adult eastern pine weevil on white pine

European Pine Sawfly

Young larva and eggs in needles

Mature larvae feeding in ground

	Feeding damage of European pine sawfly on Scotch pine		Sawfly cocoon
	Sawfly larval feeding damage

Ladybeetle

Ladybeetle feeding on pine bark adelgid nymphs

Pales Weevil

	Adult Pales weevil		Pales Weevil adult
	Weevils on stump: Pales (left) and eastern (northern) pine weevil (right)		Pales weevil "chip cocoons" under bark of stump
	Fresh Pales weevil feeding on bark. Note bare patches on branch.		Damage (flagging) caused by adult Pales weevil feeding

back | continue

 

---

Penn State | College of Agricultural Sciences | Cooperative Extension | Research

Entomology Home | Research | Extension | Education
Graduate Program | Public Education | Insect Advice
Affiliations | Facilities | People | Links

---

Copyright Information
This publication is available in alternative media on request.
Penn State is committed to affirmative action, equal opportunity, and the diversity of its workforce.
This site was design and developed by AgWebDev.
Please e-mail us with your questions, comments or suggestions at roxiesmith@psu.edu.