Verticillium Wilt (Verticillium spp.) GDD Window (base 50): 306-1370 Overview: Verticillium albo-atrium or Verticillium dahlia Soil-borne fungal pathogen that can remain in the soil for up to seven years … Read More
Banded Ash Clearwing Moth Borer (Podosesia aureocincta) GDD Window (base 50): 306-1370 Overview: Adults emerge in late summer (late-August to early September) Adults are ½” to 1″ clearwing … Read More
Snails and Slugs (Gastropoda spp.) Overview: Mollusks that thrive in cool, wet weather Soft, slimy bodies which move using a muscular foot while secreting a silvery mucus trail … Read More
Douglas-fir Needle Midge (Contarinia pseudotsugae) GDD Window (base 50): 200-400 (adult emergence) Overview: Larvae reside in the swollen areas of needles Often not observed during mid-summer Maggot is … Read More
Magnolia Scale (Neolecanium cornuparvum) GDD Window (base 50): 2155-2800 Overview: These scales emerge in August and September rather than June & July, as most other soft scale species By mid-September, … Read More
Tulip Tree Scale (Toumeyella liriodendri) GDD Window (base 50): 2032-2629 Overview: These scales emerge in August and September rather than June & July, as most other soft scale species By … Read More
Nickel Deficiency in River Birch GDD Window (base 50): First observations May – persisting throughout season Overview: Witch’s broom symptoms can occur Young leaves emerge as brown around the edges, … Read More
Nostoc (Nostoc spp.) Overview: A cyanobacterium, and one of the oldest organisms on earth Primitive growth, like algae, moss, and liverwort No roots, no vascular tissues, and is … Read More
Fleahopper (Microtechnites bractatus) GDD Window (base 50): First observations May – persisting throughout season Overview: Small plant bugs that are about the size of fleas and jump around quickly to … Read More
Leafcutter Bees (Megachile mendica) GDD Window (base 50): First observations late spring – persisting throughout season Overview: About the size of a honey bee but are mostly black with white … Read More