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Plant Disease

diseased lilac leaves

What's wrong with my lilac? Summer foliar diseases on lilac

This year has been good for many plants, but not all. In late spring Central Illinois went through almost three weeks where it rained at least once per day. Many of our plants responded to this favorably. Standing in a pollinator garden a few days ago, the goldenrod towered over me. Our vegetable...
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Tobacco mosaic virus on petunia

Dealing with plant pandemics

I bet you’re sick of reading about elections and politics. Fortunately, the Good Growing column is a welcome escape. Today I would like to dive into diseases. Oh, that’s right. We’re kind of in the middle of a global pandemic and I bet “disease” is not on the top of your list either. Within our...
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wound sealer painted on a tree wound

Should we paint tree wounds?

I spend a lot of time asking homeowners to show me their tree butts. Buttress to be specific, but industry lingo shortens it to butt and is described as the dramatic widening of the lower trunk. The buttress of a tree is located beginning at the root flare where the base of the trunk flares out...
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squash bug nymphs feeding on pumpkin vines

Trouble(s) with Cucurbits

Cucumbers, melons, squash, and pumpkins are collectively known as cucurbits. Because these crops are related, they are afflicted with many of the same pests and diseases. Here are some of the most commonly encountered pests and diseases in cucurbits. Insects Cucumber...
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a green tobacco hornworm on a tomato stem

Trouble(s) with Tomatoes

Tomatoes are the most commonly grown plant in the home vegetable garden. Tomatoes are relatively easy to grow, and there is a wide variety of different types. If you’re growing tomatoes, you’ll more than likely encounter a few pests and diseases along the way. So, let’s take a moment and talk about...
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Peach leaf infected with peach leaf curl

Peach Leaf Curl

Have you ever noticed the leaves of your peach tree becoming curled and puckered and turning reddish or purplish? If you’ve seen this, you’ve likely had peach leaf curl. Peach leaf curl is a fungal disease caused by Taphrina deformans. It is one of the most commonly encountered diseases...
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