The Rockdale Gardener

Gardening Posts From Rockdale Cooperative Extension

What is causing this circle around my tree?

There are several reasons why a circle might appear in the turf surrounding a tree. No, not aliens or crop circles. Sometimes there are many possible scenarios for a landscape phenomena. For instance, here four differing suggestions as to what could be causing the grass turn brown in a circle…
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Problems on Cedars This Spring

I have gotten many calls about various cedars/cypress/pine trees (Deodara, Italian, Leyland, etc.)  turning yellow or bronze and dropping needles. There are several things going on right now that could be the problem: Spider mites – cool season spider mites like Southern Red Mite thrive in cooler temperatures. Our relatively cool…
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Fire Blight on Pears

Check out these pictures of Fire Blight infection on flowering pears (photos by Harris County, UGA). According to the UGA Publication on Fire Blight, “Fireblight is a destructive, highly infectious and widespread disease caused by the bacterium Erwinia amylovora. Fireblight can be a problem in Georgia and is particularly prevalent in…
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Warm Season Turfgrasses Suffering from Disease This Fall

The picture to the right shows zoysiagrass suffering from a patch disease Fall 2015. The image is classic Rhizoctonia Large Patch. The turf develops brown patches with purple borders as the fungus radiates out from the site of initial infection, consuming the turf roots and damaging the grass. It is always best to…
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Large Patch Fungus Killing Warm Season Grasses This Fall

The large patch fungus attacks warm season turf during cool wet periods. The fungus eats at the plants roots, killing the grass in distinct near-circular patches. Dr. Alfredo Martinez, UGA’s Turfgrass Disease specialist, has written a really good synopsis of the disease here: Large patch disease is favored by: •…
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Ambrosia Beetles Kill Japanese Maples

If you own a Japanese maple, flowering cherry tree, redbud or any smooth barked tree, be vigilant! An insect pest is out there stalking your prized landscape tree. It is very tiny but it can bring even large trees down. This insect is an exotic invasive known as the Granulate/Asian ambrosia…
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