Hemlock Wooly Adelgid

Hemlock Woolly Adelgid
A little insect that means big trouble for hemlock trees.
What is woolly adelgid?
Hemlock woolly adelgids (Adelges tsugae Annad) are tiny insects, less than 1/16inch (1.5 mm) long, and typically a dark reddish brown or purplish black. They feed at the bases of hemlock needles, where the needles attach to the woody shoots. As the adelgids feed, they secrete white, fluffy strands of wax from pores on their body. This wax — called “ovisacs” — covers the adelgids, protecting the insects and their eggs from desiccation and natural enemies. The white ovisacs are most obvious from late fall to early summer, especially on the undersides of shoots.
Hemlock woolly adelgid has been on Michigan’s “most unwanted” list for years. This invasive forest insect has killed hundreds of thousands of hemlocks (Tsuga canadensis) in eastern states. It threatens more than 170 million hemlock trees in Michigan forests, and if not controlled, it will also kill hemlock trees in landscapes.
Are seedlings from Vans Pines free of woolly adelgid?
Yes, here at Vans Pines we have taken all the necessary steps to ensure that we continue to produce consistent quality material. Everything we grow is from seed. This provides an advantage over the current quarantine on Hemlock (Tsuga. spp.). Since we don’t import any material from an outside source, we have full control over the material we do have growing on our property.
After our hemlock germinates and is thinned, we take it out of the greenhouse and into our poly range. This set of hoop houses is located on the northeast corner of our property, away from any native hemlock in the landscape. Our potted material is located in a more central location and our field grown product on the opposite, far-southwest corner of our property. Keeping these groupings separate ensures that we don’t introduce older product with new.
In keeping with MDARD standards, our Quality and Inventory Manager does a full property inspection every two weeks, including all hemlock in the natural landscape. This inspection takes place from March 1 to November 1. In addition to the bi-weekly inspection, our hemlock is treated annually with Dinotefuran, a systemic insecticide that moves quickly through the plant. To date, no hemlock woolly adelgid has been found on or around Vans Pines property and we are permitted to ship to all states.
Call now to place your order for Fall or Spring shipping