According to Cornell University, it can take anywhere from one to 174 days for half the product to break down in the soil. Soil composition affects herbicidal activity and persistence through soil-herbicide binding (adsorption), leaching, and vapor loss (volatilization). Transplanted tomatoes (@ 2 high-in ground and the only location with no added soil or compost) are starting to grow. Put saucers underneath each pot, or position the pots far enough apart so that water running out of the bottom of the pots will not reach another pot. Two years ago, I started composting manure out of the pasture. The method of application can influence herbicide residual activity. I believe GRAZON is the devil! I dont know what I should do now. Damn stuff stays around toooo long. This is desirable for me because the summer manure is what gets spread onto my pastures in the fall when the horses come off pasture. This will lead to a reduced absorption rate. Glyphosate binds tightly to dirt, being detected up to six months after application in some types of soil, so allowing some time to pass to weaken it even slightly is desirable. Ive had two contact me about their gardens and problems theyre having. This amount can change slightly depending on the species you are dealing with. My heart is absolutely broken for her and Im very perturbed this herbicide is actually legal to spray in Canada! Read Karen Lands story. The more volatile herbicides are generally incorporated to avoid gaseous losses. I really would like to use my horse manure, but have to supplement with hay. Don't purchase compost. Tomatoes suffering the worst. I usually get a few loads every few years to top dress my garden, now Im skeptical of even doing that. Warn others. Lets take a look. It should be illegal, as its doing untold destruction to gardens and farms across the country. Because of its residual activity, control may last all season long or, depending on the weed species, into the season after application. For the best experience on our site, be sure to turn on Javascript in your browser. And it can be especially dangerous in concentrated form. Having horses grazon was recommended. Im hoping that organic compost, the kind you pay too much for at the garden center, will be ok. How long before rain can you spray Grazon? Alternatively, stock can continue to graze treated pastures inside the 42-day period but must then be fed on clean feed (from outside the treated paddock) for at least three days before going to slaughter. Persistent herbicides present in this concentrated zone may affect shallow-planted susceptible crops. Time is the true key a lot of it is just waiting for the stuff to finally break down in a few years. We had beautiful tomatoes, raised from seed. We were soooooo ignorant! My question is do I eat them???! Grazon herbicide is a restricted-use herbicide produced by Dow AgroSciences. Thanks for all the great info. Volatile herbicides include members of the thiocarbamate family, EPTC (Eradicane, Eptam) and butylate (Sutan+); the dinitroanalines, trifluralin (Treflan) and ethalfluralin (Sonalan); and clomazone (Command). Environmental effects Triclopyr breaks down in soil with a half-life of between 30 and 90 . The rest of the nation should follow. Yes, they put a warning label on it but we didnt get on on the rolls of hay we bought. People are still disbelieving on this topic. Thereof, how fast does Grazon Pro work? Then I replaced it with a 50/50 mix of black dirt and composted food waste. All the new growth twists and thickens as the cell-stacking function is inhibited by the toxin, causing that weird, horrible growth, and tinier and tinier little leaves. Grazon is such horrible stuff. If my determinates do okay in the flushed soil (now recovered with plastic hoophouse), we will be sure to remove the plastic from the high tunnel and let it flush out next winter. You can also subscribe without commenting. A. I cleaned all of the soil out of the bed to a depth of 18 inches below ground level. Grazon P+D is safe on established cool-and warm-season grasses used for pasture and hay production. Between the chicken manure applications. When used in meadows, it increase yield and quality of hay. If you're testing hay or straw, chop it up and mix it in. This is the Herbicide from Hell. We have about 40 chickens and soon will have rabbits. Learn how your comment data is processed. I was never told not to compost the manure. David, I have no idea how to fight the poisoning of manure, which has traditionally been the mainstay fertilizer of organic gardeners, but I do want you to know that I wont stop writing about it and trying to save as many of your gardens as I can. Are the mushrooms safe to eat? I dont yet see any sign in these tomatoes, but they were planted two weeks later. Crop rotation is often dictated by economics, but important differences exist between crops and even among varieties. Others less prone to chemical breakdown are lost primarily through microbial alteration. Thx for the info! For several years, a commercial weed killer stays in the soil or gets incorporated into it. I was told it was safe for the horses to stay in the pasture while it was sprayed and even ok for the horses to eat while still wet. I spent a lot of time with a shovel collecting the manure, turning it, and delivering it to friends. This year i got a HUGE amount of grasses. If I am not mistaken Grazon contains 2,4-D. Is not this related to Agent Orange and Dioxins? Get it out of your garden beds. Some herbicides are rapidly decomposed by microorganisms if the right kind and number are present and if soil conditions are favorable for their growth. What Are The Health Hazards of Using Grazon? I dont think you could even *begin* to trace the source. The same type of interaction can occur when EPTC (Eptam) is used for alfalfa establishment if small amounts of atrazine residue remain from previous use in corn. I have replanted in a new area successfully. You can plant corn and grains and theyll produce. Beware!!! However, avoid applying two or more herbicides with a longer residual life during the same season. I had NEVER heard of this nasty chemical before!!! Having horses, manure is important part of justifying their expense. I have planted heirloom tomatoes for the past 8 years. While spraying the herbicide, cover the entire foliage of the weeds till the point of run-off. For large-scale use, you will need a more robust pump to get the job done. Tordon stays active and toxic in soil for up to a year after normal application. If they look weirdly twisted and curled and youve applied manure, straw or hay at some point, its probably Grazon. The companys website also provides information regarding the concentration needed for handling different species. They do stay in the grass for about two days after treatment. Get it out of your garden beds. Id used grazon-sprayed cow pasture manure for years w/ Great success until 2016 (I think it was). One of them asked if we were using grazon. Just click not applicable. Ive been trying to get them to drop those ads. its my understanding Dow Chemical slightly changed the composition of Grazon in the mid-2000s, and they too were surprised at the effect tainted manure had on plants. So, even after the hay is long gone, the manure will probably still be full of poison. I called Dow and the EPA. Support this site: shop on Amazon using this link. Several factors determine the length of time herbicides persist. Grazon Pro - Unrivalled selective pasture weed killer for tough grassland weeds including: docks, thistles, nettles, bramble, broom and gorse. I think both of those would be fine. Depending on the situation, the herbicide can be deactivated in as few as 30 days, but some field reports indicate that complete deactivation and breakdown may take several . Grazon Extra - overview. Always read the label before applying any herbicide. We added cow manure from a neighbor a year ago and it was rototilled in several times. One of them asked if we were using grazon. The characteristic twisting of the new growth makes it obvious once youve seen it once. This year, I started giving it to friends. I try to garden organic and use some bagged manure from Lowes and Home Depot. If you need to add some other wetting or penetration agent for some particular weed population, add them once the tank is filled with the water solution. It seems to bother plants in the nightshade family the most. It was like garden magic. Usually 95% of this bile is reabosrbed but using the soluble fiber some of it is excreted in the poop. The residual effect is desirable so as to not reintroduce weeds from manure into the pasture. -. Chemical analysis can be expensive and not all herbicides can be analyzed, so a bioassay may be more feasible. I would probably just throw it away. Friends, You all need to get a lawyer and begin a Class Action Lawsuit against the manufacturers of these products. As it is systemic in nature, it will be absorbed by the leaves and the stems and carried all the way to the roots to kill the plants. Transplanted most to raided beds in April. I am also planting all of my leftover pepper plants out in the open, uncontaminated garden. Take glyphosate, for example. MUCH appreciated. Stock grazing can resume only 7 days after application (but longer if poisonous weeds such as ragwort are present) It is very good value for money - 16 knapsacks from each litre of product when mixed in 10 litre batches It is rainfast in only 2 hours and is very safe to grass Some herbicides are prone to chemical reactions. I dont know if you will see this many years later I hope you are doing better, I wanted to share this in the hopes it would help you or anyone reading this. I have lettuce, radishs, beans, peppers, onions, mustard growing in it as well but not much visible damage. How can you control that? I do have goats but they dont eat bitter weed and Horse netted is toxic to them too. How many years before I can plant in this same area? It would take planning and room but you could grow a small patch with a certain compost pile, if no damage then that pile is "cleared" for further use. Thank you for sharing your story. Answer: GrazonNext HL Herbicide will not control Johnsongrass. Will that destroy the Grazon? The immense distress, grief, and inconvenience caused is staggering, not to mention the financial expenses. We do not experience any issues with it. I am the guy behind Theyardable.com. As they said, super hot composted and a year later used in repotting the tomatoes in the greenhouse. Finally hardened off what I had and planted outside late! Several families of herbicides are degraded both through chemical and through microbial pathways. Sudex can grow very tall in agricultural settings. Tell everyone about this garbage. Yeah, that is almost certainly the issue. Little extreme I know, but just curious .. This practice will help protect plants from damage. I feel bad about encouraging a farm owner to use a spray to eliminate dogbane from horse hayfields 15 y ago. It doesnt cost you a penny and it helps pay for my hosting! Its horrible, horrible stuff it shouldnt even be legal. 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