Two general defoliators are producing damage in southwest Ohio: yellownecked caterpillars and walnut caterpillars. Both of these caterpillars feed in groups, or "colonies," of 10-30 individuals throughout their development which is why their defoliation is often focused on a single branch or a group of adjoining branches. However, it's also why multiple colonies can quickly defoliate small trees.

Dogbane is the representative species for the dogbane family, Apocynaceae, which includes milkweeds and other plants that ooze milky sap ladened with poisonous alkaloids. Indeed, Apocynum translates to "poisonous to dogs," or "dog killer." Sap from the plant is reported to have been used against ravenous feral dogs.

For 2017, a new program is available at the Ohio State University Cultivar Trial garden that offers a 360˙ panorama tour for anyone who uses a computer, cell phone, tablet or  a VR headset.

White pine weevil larval feeding damage is now evident throughout Ohio. Look for brown, wilted main shoots (terminal leaders) with the tips sometimes curved into a "shepherd’s crook." There is one generation per year and localized populations may be reduced by removing and destroying the infested terminals before new adult weevils emerge.

  Let us call this A Case of Gallignostics. Plant galls are defined as abnormal plant growths caused by a gall-maker; the gall-maker being certain insects, mites, fungi, and bacteria. From horned oak gall to bacterial crown gall, from maple bladder galls to cedar-apple rust galls, there are many galls of interest to horticulturists. Relative to all this, Joe Boggs recently got an e-mail from Michael Goldman of the Grange Insurance Audubon Center:

 

  I'm a big fan of the BYGL, and found something here that might be interesting for it.  The pictures I took look like some...

Paper Wasps, Yellowjackets, and Baldfaced Hornets are beneficial insects. Just keep repeating that to yourself when you're being chased or stung by these hymenopteran marauders! They’ve been with us since the beginning of the season. However, this is the time of the year when their ever-expanding nests become large enough and contain enough individuals to make their presence sometimes painfully known.

Aug 3, 2017, 8:00am CSAW Level 1 - A full 8 hour class with a lecture portion in the morning and a hands-on portion in the afternoon.

Workshop Name:  Tree Diagnostic Workshop - What’s Wrong With My Tree?

 

Workshop Date:  Friday, August 4, 2017

 

Event Location:  Ohio State University Mansfield, 100 Ovalwood Hall, 1760 University Drive, Mansfield, Ohio

 

This Ohio Woodland Stewards Program spends the day with Extension specialists to diagnose some common and not so common tree problems. Learn what trees need immediate attention from what is just cosmetic and won’t compromise the health of the tree. 

 

Ask questions and get answers and find...

Look closely at the leaves of ornamental sweet potatoes, morning glories, or bindweed for flecks of gold creeping across the lower leaf surfaces; those would be Golden Tortoise Beetles (Charidotella sexpunctata). They are also called “sweet potato beetles” because of their common occurrence on both cultivated and ornamental sweet potatoes and “goldbugs” because of their appearance.

The bright yellow floral display currently blanketing some lawns and roadway right-of-ways is being produced by Birdsfoot Trefoil. The yellow flowers are smaller than dandelion flowers, bigger than those of black medic, and resemble buttercups from a distance. This non-native plant was imported with good intentions, but is now gaining weed status in lawns, landscapes, and naturalized areas in Ohio. Yet another example of unintended consequences with introducing non-natives.