Chestnut leaf curl
- Thread starter mattpatt
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T-Max
Well-Known Member
Any ag fields nearby? Looks like what happens to beans affected by dicamba drift.Anyone know what is causing the leaves to curl up on some of my Chestnut trees?
I water them once a week with a slow drip type soaker hose so I don’t think it’s due to lack of water.
Matt
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mattpatt
Well-Known Member
Yes there is a ag field fairly close by but it has corn planted on it right now.
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mattpatt
Well-Known Member
T-Max
Well-Known Member
I saw a field of beans that looked like it had suffered dicamba damage last year. I finally caught up with the farmer this spring to ask him about it. He said an equipment rep Demo’d a new spray rig for him. He had previously sprayed dicamba through it. They followed the recommended rinse procedures, but rinsed 5 times instead of the 3 that they were supposed to. The farmer helped him do it, so he knows it got done. Still had damage. Cobra heads everywhere. He said his yield was half of what it should have been. It’s some nasty stuff......
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T-Max
Well-Known Member
In the link above, it didn't kill his trees. I have read quite a few articles on dicamba and the drift distance is amazing. Most of them describe a situation where the plants don't die unless they are directly sprayed with the chemical as opposed to drift. It almost always effects yields, and who knows what the long term effects on plants such as trees could be.
DrDirtNap
Active Member
If you were a big farmer fighting glyphosate resistant pigweeds you might have a different perspective on why it is still available.
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I’m not so sure about that. I’m not too excited about spraying chemicals that can volatize 48 hours after application and kill my neighbors stuff half a mile away.
Edit: But your point is valid. Weed resistance is an important issue. And maybe dicamba is not to blame for everything that it has been blamed for recently, but there clearly is an issue with this chemical.
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DrDirtNap
Active Member
While some studies do indicate some dicamba volatility within the treated area, there are no controlled studies that indicate there is enough volatility leaving the treated area to cause issues. A lot of talk and speculation but no data. There are, no doubt, issues with application and not following the application requirements as required by the label.
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Cap'n
Active Member
I wonder if it's an Ester or Amine formulation. Ester is way too volatile to spray in high temps. Usually each county will have spraying restrictions as in spraying when the wind is over 10 mph etc.. when spraying a phenoxy herbicide. He may have used an Ester formulation which is way more likely to volatilize and do damage down wind. If he did that is not in compliance with the label in summertime temps and he may be liable for damages.
DrDirtNap
Active Member
I believe you are thinking about 2,4-D which is another Auxin herbicide but still very different from dicamba. The three formulation salts of dicamba offered on the market today are the DMA (dimethylamine), DGA (diglycoamine) and the newest salt, BAPMA (Bisaminopropyldimethylamine).
Only two formulations are labeled and registered to be used over the top of dicamba tolerant soybeans and cotton (Xtend crops). Those formulations are either the DGA salt with the VaporGrip volatility reducing additive or the BAPMA salt.
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DrDirtNap
Active Member
Could very well be from a pasture application and all formulations of dicamba and 2,4-D are labeled for that use as far as I know. Dicamba can certainly be used in corn and the formulations I mention above can be used in Xtend cotton as well.
mattpatt
Well-Known Member
I guess whoever did it is a mute point. It’s done. Nothing I can do. It really set back my young trees. The older trees had some leaf curl also but they are already putting on new leaves. The smaller trees are just hanging on to what is already there and not putting on any new growth.
Matt
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Matt
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Cap'n
Active Member
Yeah your right I think they may have sprayed 2-4-D in an ester formulation and it's volatilizing and drifting. There are a lot of products for pasture weed control with 2-4-D & dicamba and or MCPA / MCPP or triclopyr in them but it's the 2-4-D that if it's an ester it gasses off In high temps. If it's an amine it wouldn't have drifted as far unless it was sprayed in a wind storm which most people know you can't do that.
Matt you ought to let him know that whatever he sprayed is damaging plants on your land.That would suck to have chestnuts producing and he's out spraying thistle in '90 degree weather with a volatile product.
USC country
Member
How are your trees doing?
mattpatt
Well-Known Member
Sorry just now saw this. Most of the trees bounced back. I had a couple of two year old trees that it bit back pretty hard. They all survived but the young trees didn’t grow very much this year.
Matt
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