Pest Plants

Poison Ivy – Jewelweed Remedy (and Identification)

Q: I heard you on the radio tell about a native plant in the impatiens family that is a good treatment for poison ivy. Can you tell me the name of it so that I can get some and plant...

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Mulberry Weed – Control

Q: Last year a weed appeared in my yard. I tried to keep it weeded and this year I put out Preen. None of the above did any good. It has come back with a vengeance. It is in my...

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Crabgrass – Control in Bahia

Q: I have a new lawn of bahia grass and it is now full of crabgrass. Is there any products I can use to kill this off. I have been pulling by hand and reseeding but I am loosing the...

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Stream Irrigation – Causes Weeds

Q: I suspect that irrigating from a stream has another negative aspect beyond the questionable cost effectiveness. I “inherited” a lawn which had been watered with stream water for several years. You would not believe the number of various strange...

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Euphorbia lathyris – Identification

Q: The attached photos are of an odd plant that pops up in different places each year in my backyard. The leaves on the bottom part of the stem are different from the leaves at the top. What is it?...

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Chickweed – Identification

Q: Recently, a pretty little groundcover has sprung up among my bulbs and I can’t identify it. It’s low-growing (about 3-4″ at its highest), with spade-shaped leaves about 1/2″ long and tiny white flowers about 1/8″ in diameter. It seems...

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Trampweed (Facelis retusa)

Q: I have seen a very short white fuzzy weed in some yards around my neighborhood. It’s very short but it’s not a dandelion. It make the lawn look snowy or cottony. Do you have any idea on what it is?...

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Water Hyacinth – Control

Q: Can you tell me what this plant is and any way to control it. It has begun taking over the river backwater on our farm in south Georgia. A: It’s water hyacinth, Eichhornia crassipes. Depending on the size of...

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Beggarweed, Beggartick – Identification

Q: This is a weed seed to beat all weed seeds. I thought I had been attacked by plants before, but this was ridiculous. I saw a weed along the fence in our road, and trying to be a good...

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Ragweed – Identification and Control

Q: I have a plant I need you to identify. In early May I noticed it was about 6-8 inches tall. It had an interesting leaf pattern. It is now (in June) more than five feet tall. Any idea on...

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Burnweed – Control

Q: I have tried through every source that I know to identify this weed. I have been told that is germinates in the thatch of lawns and mulch and is not controlled by pre-emergent. Please give me the name and...

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Water clover – Control

Q: We have a pond plant looks very similar to a four leaf clover, with emersed roots. We are already seeing it begin to proliferate in our pond. What can be done to control it? A: It’s Marsilea quadrifolia, commonly...

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Kudzu- Slow Control With Glyphosate

Q: We are building a new home. Right now the area that is to become the front yard is a thriving “Hill-o-Kudzu”! Currently we are using Roundup on it. It seems to kill the kudzu back short term but new...

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Kudzu- Cars

Q: As a chemist and a plant lover, you seem to be the best person to answer this question. What’s the hold up on using kudzu to power cars? Think how many problems this would solve: no pollution, land under...

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Weeds- Prevention

Q: We have a large, low deck and weeds are growing up between the deck planks. They are pretty large weeds and I really don’t want to crawl under the deck. How can we get rid of them and prevent...

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Gasoline- Weed Control

Q: My neighbor told me he uses gasoline to control weeds. He says it works better and is cheaper than Roundup. What are your thoughts? A: Gasoline also removes dirt better than soap, but I’ll bet your neighbor doesn’t bathe...

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Weed killers – Vinegar

Q: You always recommend the popular brand name weed killers but these are expensive to use. Vinegar will kill weeds and is only $2.00 a gallon. Is there some reason it should not be used? A: I sometimes recommend brand...

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2-4-D – Flowers

Q: I know that 2-4-D is a selective chemical that will kill broadleaf weeds and not harm your grass. Is it safe to spray on annuals and perennial flowers? My vinca major is overrun with vetch. A: The chemical we...

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