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Contact Injury on Wheat (06/04/15)

Question: Does this look like a contact herbicide on wheat leaves? There is damage on one side of field and less as you go farther out into field. The injury is greatest along the whole field edge. The adjacent field is soybeans and I think it was sprayed prior to beans emerging. So maybe a burn down product was used, do you know what may have been used as a contact burn down product?

 Contact Injury on Wheat

Question:  Does this look like a contact herbicide on wheat leaves? There is damage on one side of field and less as you go farther out into field. The injury is greatest along the whole field edge. The adjacent field is soybeans and I think it was sprayed prior to beans emerging. So maybe a burn down product was used, do you know what may have been used as a contact burn down product?

Answer: This desiccated tissue showing localized spotting and speckling is classic paraquat (Gramoxone) symptomology. Sharpen can also cause similar symptoms but would require addition of an aggressive oil adjuvant like an MSO. When contact herbicide injury is observed, new growth will not have symptoms and there should be no yield loss.wdsci.zollinger.wheat.contact injury

Rich Zollinger

Extension Weed Specialist

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