‘Dog-day’ Cicada (Neotibicen canicularis) GDD Window (base 50): 1500 (approx.) adult emergece Overview: Often overlooked because periodical cicadas are more publicized Emerge early July and die by mid-September Can be … Read More
Azalea Whitefly (Pealius azaleae) GDD Window (base 50): 448-700 (1st gen), 1250-1500 (2nd gen), 2032-2150 (3rd gen) Overview: Tiny, 1/16” long, powdery white insects that look like very small moths … Read More
Juniper Webworm (Dichomeris marginella) GDD Window (base 50): 1645-1917 Overview: Spins silk to fasten together the needles and twigs of juniper Overwinter as partially grown black-headed, brown striped worms inside … Read More
Mimosa Webworm (Homadaula anisocentra) GDD Window (base 50): 880-1200 (1st gen egg hatch), 1800-2100 (2nd gen egg hatch) Overview: Overwinters as pupae in cocoons, and within bark flaps and cracks … Read More
Plant Leaf Galls (Eriophyid mites) Overview: Abnormal growths triggered by various factors Appear as bumps, bladder, & spindle galls, or Erineums (dense cluster of plant hairs) as a plant’s reaction to the presence or activity of foreign substances Appear … Read More
Azalea Leafminer (Caloptilia azaleella) GDD Window (base 50): 450-800 (1st gen)/1260-1500 (2nd gen) Overview: Symptoms are often subtle and overlooked Early instar stages are leafminers, while the later instar stages are leafrollers … Read More
Dogwood Sawfly (Macremphytus tarsatus) GDD Window (base 50): 1151-1500 Overview: Adults are slender, shiny, black, wasp insects & emerge May to July Females insert up to 100 eggs into a leaf using an … Read More
Nantucket Pine Tip Moth (Rhyacionia frustrana) GDD Window (base 50): 121-448 (1st gen larvae)/1514-1917 (2nd gen larvae) Overview: Caterpillar pest that overwinters as brown-colored pupae within branch tips On small … Read More
Two-Banded Japanese Weevil (Pseudocneorhinus bifasciatus) GDD Window (base 50): 1644-2271 (adults) Overview: Adults are 3/16” long, round, and brown to gray with two dark bands across the wing covers … Read More
Tulip Tree Aphid (Illinoia liriodendri) GDD Window (base 50): 1151-1514, 1917-2033 Overview: Wingless aphids are 1/8” long, spindle-shaped, and pale greenish-yellow or pinkish-red, with black antennae that are longer than … Read More