Rusty Hawthorns

This is the time of the year when rust diseases make it easy to spot wild hawthorns growing along Ohio trails as well as in landscapes. They have orange spotted leaves and "orange-hairy haws." I may be exaggerating a bit, but these rust symptoms can certainly make woodland hikes interesting.
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Joe Boggs
ODA Announces Gypsy Moth Mating Disruption Treatment stone.91 Wed, 06/13/2018 - 22:52

 

The Ohio Department of Agriculture (ODA) recently announced plans to begin aerial treatments designed to disrupt gypsy moth mating later this summer. Treatments will be applied to 32,526 acres in fifteen counties across the state. 
 

The gypsy moth is a non-native, invasive species that feeds on the leaves of more than 300 different trees and shrubs and is especially fond of oak as a caterpillar as shown below.

 

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Amy Stone

Perceived Willow Woes

I'm an unabashed fan of willows. Of course, no tree is perfect and willows have a few pests. Thankfully, the depth of their vital spark means willows are capable of handling the depredations of most pests. However, the pests I'm highlighting can make trees look bad.
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Joe Boggs

Ghosts in the Mist Thistle

Canada Thistle in southwest Ohio is starting to show the "ghostly" white symptoms of bacterial infections. The tops of infected plants look like they were dipped in bleach. The bacterium produces a chemical called tagetitoxin which is a RNA polymerase III inhibitor that blocks the production of chloroplasts.
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Joe Boggs

Really MOOOving Along in NE Ohio

Driving along in Northeast Ohio, I came around a bend in the road and saw some tall weeds with clusters of white flowers in the roadside ditch.  The flower heads had the classic shape of the Apiaceae or carrot family with the typical “compound umbels” on display.  Think of an upside down umbrella with all the flower clusters radiating upward from a single point end of the stalk to form a flattened flower head about 6-10” across.  So, I just had to stop and look at these plants knowing the concern that they will incite when people panic because they think they are seeing...

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Authors
Erik Draper