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Monthly Tips for April

Outdoor Garden and Yard Tips Cedar-apple rust disease forms its galls on Virginia cedar (Juniperus virginiana) in April. The odd-looking galls are at first bright orange gelatinous balls with long “horns” or projections; they later turn brown and become hard. They are…

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Spotted Lanternfly Update: Be on the Lookout for Egg Masses

Spotted Lanternfly (Lycorma delicatula) is a new invasive pest in the mid-Atlantic region. The first Spotted Lanternfly in Maryland was confirmed in Cecil County in October 2018. (See the Maryland Department of Agriculture press release.) This insect is known to…

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The Nativar Dilemma: The Case of My Purple Ninebark & The Leaf Beetle

I thought I was doing the right thing. When I moved into my house 11 years ago, I found a purple barberry shrub (Berberis thunbergii) planted in the back yard by the previous owner. I thought right away, it had to…

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Monthly Tips for November

Ornamental Plants Pansies are a good choice for fall and winter color in the garden. If you want to plant pansies you need to do it very soon to assure that their roots get established for winter. As a bonus,…

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Ambrosia Beetles Are Behind Those Tubes

Q: These things like spaghetti pasta were sticking out of our tree that suddenly died. They crumbled when I touched them. Did they attack the tree and kill it? A: These are sawdust tubes pushed out by ambrosia beetles as they bore…

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Multi-colored Asian Lady Beetles Are Also Known as Halloween Beetles

To keep in the spirit of Halloween, I wanted to talk about a beneficial insect with orange and black coloration. The first to come to mind is the multi-colored Asian lady beetle, Harmonia axyridis. Both the coloration and the timing…

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Q&A: They’re Orange and Black But Not Monarchs. What’s Eating My Milkweed Plant?

Q: I found these orange bugs all over the milkweed I planted for Monarch caterpillars. What are they and what, if anything, should I do about them? I don’t want to harm other organisms. A: What you have here are…

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