Wheat - Seed Treatments
Jan 29, 2007 3:06 PM
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| Disease | Fungicide | Active Ingredient | Rate/cwt Seed | Comments | ||||||
| Loose Smut | Raxil MD | tebuconazole + | 5-6.5 fl oz | On-farm or commercial use. Dilute 1:1 | ||||||
| Stagonospora glume blotch | (flowable) | metalaxyl | with water before application to seed. | |||||||
| (glume blotch) | Already contains dye. Do not graze for | |||||||||
| 38 days after seeding. Also controls | ||||||||||
| loose smut of oats - see label | ||||||||||
| Raxil XT | tebuconazole + | 0.16-0.20 oz | Commercial seed treaters only. Dye | |||||||
| (water-soluble | metalaxyl | must be added. Do not graze for 38 | ||||||||
| powder pouches) | days after seeding. Also controls | |||||||||
| loose smut of oats - see label | ||||||||||
| Raxil-Thiram | tebuconazole + | 3.5 - 4.6 fl oz | Commercial seed treaters only. Dye | |||||||
| (flowable) | thiram | must be added. Do not graze for 31 | ||||||||
| days after seeding. Also controls | ||||||||||
| loose smut of oats - see label | ||||||||||
| Dividend | difenoconazole + | 2 fl oz | On-farm or commercial use. Wheat Cannot | |||||||
| Extreme | mefenoxam | be grazed until 55 days after planting. See | ||||||||
| label for other restrictions. | ||||||||||
| Note: Wheat seed producers in Arkansas should always plant seed treated for prevention of loose smut and Stagonospora glume blotch to maximize | ||||||||||
| seed quality and prevent a buildup of these diseases in the seed supply. Growers that plant saved seed should have it treated with one of the | ||||||||||
| listed fungicides if the seed came from a field with these diseases or if either of the diseases was at epidemic levels in nearby fields during the spring. | ||||||||||
| Metalaxyl and mefenoxam are expensive fungicides active against Pythium root rot and come prepackaged with tebuconazole and difenoconazole | ||||||||||
| the active compounds against Loose Smut and glume blotch. We do not recommend metalaxyl or mefenoxam to control Pythium root rot for | ||||||||||
| wheat or for other stand establishment diseases since numerous field trials in Arkansas have not shown any benefit from the use of metalaxyl or mefenoxam on wheat seed. | ||||||||||
| However, prepackaging prevents us from listing only needed components | ||||||||||
| --Rick Cartwright and Gene Milus, Arkansas Cooperative Extension Service | ||||||||||
