Herbicide Carryover in Hay, Manure, Compost & Grass Clipping
Verfasst: Mo 14. Dez 2015, 18:42
kam eben als Mail von Kumpel, der mich immer mit interessanem Lesestoff versorgt, sei es ein Bericht ueber das lokale Eisenbahnmuseum. den Appalachian Trail oder was zum Thema Gaertnern
ich geb's mal unkommentiert weiter, heue hab ich keine Zeit fuer Mails
Hey,
Stumbled on this while researching whether oak leaves are good to make mulch out of. They are. Apparently some of the commercial broadleaf herbicides are long lasting. Fortunately they aren't allowed in residential use. But that doesn't mean us consumers might not run into them. If you were to use some hay in your yard that they were sprayed on, you could run into problems. Or if the hay was used to make compost, there could be a potential problem. Or even if you use manure from a horse/cow that has been eating the hay. It's safe enough for horses/cows to eat it, but just because it goes in one side and comes out the other, doesn't mean it did anything to the herbicide.
And there's no way to easily test for it. Too expensive. And any of the local sources of manure around here, unless they are growing the hay themselves probably have no idea what may or may not have been sprayed on the hay they are feeding their horses/cows. You could always ask, but it may be hit or miss if they have the slightest clue. And because of the variable sources of hay, it may be safe sometimes and other times not. And here's the big problem, if you by accident use some tainted hay/compost/manure on your garden/flowers, those areas becomes useless for 1-2 yrs except for growing grass. Only thing that would speed up the break down of the herbicides is sun light and moisture. You would just have to keep turning the soil over to expose it to sun light. :-(
The only way to tell if it is safe to grow in again is to "test" it. Which is the only way to tell if any hay/compost/manure you are using is safe. The "test" is to try a sample and see if you can get anything to grow in it. Take some compost/manure and mix it 1:1 or even 2:1 compost/manure to soil, put it in a few pots and see if you can get some peas/beans to sprout/grow in it. If they grow than it's safe. Otherwise the only thing it's good for is growing grass.
I tried growing some pole and bush beans this year. I didn't get a single one to sprout and was puzzled by that. And yet I used the same manure which I got from you in other areas and my tomatoes, corn, mustard, cucumbers "seemed" to do fine. I still have some bean seed left. I'm going to do a test with known good soil, and some of the stuff I mixed the manure in with and see if it was the seed or possibly the manure. I'll let you know what I find out.
And the thing is, you're source of compost/manure may at times be safe and other times not. It all depends on what the horses/cows are eating. And there is no way to tell by looking at it. Just have to try growing something in it. And the penalty for getting it wrong is pretty severe, 1-2 yrs of a ruined garden. Yikes.
So you need to start asking questions about where the manure you are getting is coming from and what the horses/cows are eating. I had never heard of this problem before. And I'm now wondering about the safety of any local sources of manure you or I've found. And the only way to know for sure is a time consuming 2-3 week, try and grow something in it test. And to rule out bad seed, you're going to also have to try the seed in known good soil at the same time. Shish.
For some good news, I had some volunteer tomatoes sprout up over near my compost piles where I was throwing the bad tomatoes. Before the first frost a few weeks ago I potted up two about 1 ft tall ones. One of them now has flowers on it. Maybe with a little luck I might have some ripe tomatoes by the end of January.
Tom
HERBICIDE CARRYOVER IN HAY, MANURE, COMPOST, AND GRASS CLIPPINGS:
Caution to Hay Producers, Livestock Owners, Farmers, and Home Gardeners
Many farmers and home gardeners have reported damage to vegetable and flower crops after applying horse or livestock manure, compost, hay, or grass clippings to the soil. The symptoms reported include poor seed germination; death of young plants; twisted, cupped, and elongated leaves; misshapen fruit; and reduced yields. These symptoms can be caused by other factors, including diseases, insects, and herbicide drift. Another possibility for the source of these crop injuries should also be considered: the presence of certain herbicides in the manure, compost, hay, or grass clippings applied to the soil.
Read the rest (6 page pdf) here, http://content.ces.ncsu.edu/herbicide-carryover
ich geb's mal unkommentiert weiter, heue hab ich keine Zeit fuer Mails
Hey,
Stumbled on this while researching whether oak leaves are good to make mulch out of. They are. Apparently some of the commercial broadleaf herbicides are long lasting. Fortunately they aren't allowed in residential use. But that doesn't mean us consumers might not run into them. If you were to use some hay in your yard that they were sprayed on, you could run into problems. Or if the hay was used to make compost, there could be a potential problem. Or even if you use manure from a horse/cow that has been eating the hay. It's safe enough for horses/cows to eat it, but just because it goes in one side and comes out the other, doesn't mean it did anything to the herbicide.
And there's no way to easily test for it. Too expensive. And any of the local sources of manure around here, unless they are growing the hay themselves probably have no idea what may or may not have been sprayed on the hay they are feeding their horses/cows. You could always ask, but it may be hit or miss if they have the slightest clue. And because of the variable sources of hay, it may be safe sometimes and other times not. And here's the big problem, if you by accident use some tainted hay/compost/manure on your garden/flowers, those areas becomes useless for 1-2 yrs except for growing grass. Only thing that would speed up the break down of the herbicides is sun light and moisture. You would just have to keep turning the soil over to expose it to sun light. :-(
The only way to tell if it is safe to grow in again is to "test" it. Which is the only way to tell if any hay/compost/manure you are using is safe. The "test" is to try a sample and see if you can get anything to grow in it. Take some compost/manure and mix it 1:1 or even 2:1 compost/manure to soil, put it in a few pots and see if you can get some peas/beans to sprout/grow in it. If they grow than it's safe. Otherwise the only thing it's good for is growing grass.
I tried growing some pole and bush beans this year. I didn't get a single one to sprout and was puzzled by that. And yet I used the same manure which I got from you in other areas and my tomatoes, corn, mustard, cucumbers "seemed" to do fine. I still have some bean seed left. I'm going to do a test with known good soil, and some of the stuff I mixed the manure in with and see if it was the seed or possibly the manure. I'll let you know what I find out.
And the thing is, you're source of compost/manure may at times be safe and other times not. It all depends on what the horses/cows are eating. And there is no way to tell by looking at it. Just have to try growing something in it. And the penalty for getting it wrong is pretty severe, 1-2 yrs of a ruined garden. Yikes.
So you need to start asking questions about where the manure you are getting is coming from and what the horses/cows are eating. I had never heard of this problem before. And I'm now wondering about the safety of any local sources of manure you or I've found. And the only way to know for sure is a time consuming 2-3 week, try and grow something in it test. And to rule out bad seed, you're going to also have to try the seed in known good soil at the same time. Shish.
For some good news, I had some volunteer tomatoes sprout up over near my compost piles where I was throwing the bad tomatoes. Before the first frost a few weeks ago I potted up two about 1 ft tall ones. One of them now has flowers on it. Maybe with a little luck I might have some ripe tomatoes by the end of January.
Tom
HERBICIDE CARRYOVER IN HAY, MANURE, COMPOST, AND GRASS CLIPPINGS:
Caution to Hay Producers, Livestock Owners, Farmers, and Home Gardeners
Many farmers and home gardeners have reported damage to vegetable and flower crops after applying horse or livestock manure, compost, hay, or grass clippings to the soil. The symptoms reported include poor seed germination; death of young plants; twisted, cupped, and elongated leaves; misshapen fruit; and reduced yields. These symptoms can be caused by other factors, including diseases, insects, and herbicide drift. Another possibility for the source of these crop injuries should also be considered: the presence of certain herbicides in the manure, compost, hay, or grass clippings applied to the soil.
Read the rest (6 page pdf) here, http://content.ces.ncsu.edu/herbicide-carryover
