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In this Issue: May 27, 2004 |
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New PDIS Database for Submission of Digital & Physical Samples |
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Folicur 3.6 F Granted Section 18 Emergency Exemption For Use on Sunflowers to Control Rust. The EPA has issued a Section 18 Emergency Exemption for the use of Folicur 3.6 F foliar fungicide to control common red rust on sunflowers in Kansas. This labeling became effective May 3, 2004 and expires on September 15, 2004. According to the label, Folicur 3.6 F should be applied at the rate of 4 fl. oz. per acre at the earliest sign of rust pustules or when weather conditions are conducive for rust development. A second application may be made 14 days later. The fungicide should be applied in sufficient water for thorough coverage. Twenty gallons of spray water is recommended for ground application and 5 gallons of water if applied by air. Use of the lowest label rate of an approved surfactant will enhance disease control. A maximum of 8 fl. oz. of Folicur 3.6 F may be applied per acre per year. Folicur may be applied up to 50 days before harvest. A rotational crop restriction of 120 days applies to crops not currently listed on the registered label. Our experience with sunflower rust in Kansas is that if rust pustules are found on the upper leaves at budding, the crop may often benefit from a fungicide application. For oilseed sunflowers, many hybrids have adequate resistance to rust and therefore, hybrid selection is the first line of defense. Confectionary hybrids are more likely to respond to fungicide application for rust control. (Jardine)
Soybean Stand Establishment Problems The recent spate of cold, rainy weather in the eastern part of the state was ideal for the development of seedling blights in soybeans, particularly Pythium blight. With the current hotter weather, infected plants will be placed under moisture stress and evidence of the earlier infection will become more noticeable. With Pythium blight, seed may rot prior to emergence. In other cases, the plant will emerge but then die back. Close inspection of the affected plant will often show a thin, collapsed stem right at or just below the soil line. This symptom is referred to as damping-off. Plants with this symptom generally do not recover. Fields affected by seedling blights should be thoroughly evaluated before making the decision to replant. Final stands of 75,000 to 100,000 are often adequate in eastern Kansas for good yields. In fact, if it turns hot and dry in July and August and charcoal rot begins to develop, these fields may be the top yielders because of less competition for moisture among plants. The general recommendation for Pythium blight management in Kansas is to use a seed treatment fungicide such as Apron XL, ApronMaxx, Allegiance or Apron FL on beans planted earlier than May 15. If the planting is being done no-till, seed treatment is recommended for beans planted prior to Memorial day. Later planted beans will also benefit from products containing thiram, PCNB, azoxystrobin or fludioxonil. Check with chemical dealers or seed company representatives for products that contain these materials. (Jardine)
New PDIS Database for Submission of Digital & Physical Samples The new system is in place and went live in April. If you haven’t had a chance to try out the new system yet, please give it a go. Those of you who have used it; thank you for your patience. We have gotten many kinks out of the system already and are still taking suggestions for a more user-friendly system. Don’t forget to use the "free" coupons you received upon completion of training. Sending them in with the check sheet when you submit the samples is the best thing to do. We do have to receive the sticker in order to give you the free sample, the auditors have to see proof of the "no charge" we record. I am still figuring out an efficient system for recording these stickers, so if you receive an Invoice in error; i.e., you sent in a "free" coupon, please be patient with me. Let me know by email and I’ll correct the error immediately. We all want this new system to work for you so please do not hesitate to give any of us a call if you run into roadblocks or have any questions about the process. We will be happy to assist. (Diana) |
| Sincerely,
Ned A. Tisserat E-mail: tissne@plantpath.ksu.edu |
Kansas State
University K-State Research and Extension Department Of Plant Pathology 4024 Throckmorton Manhattan, Kansas 66506-5505 Phone: (785) 532-5810 FAX: (785) 532-5692 |
Extension Plant Pathology, KSU, County Extension Councils and U. S. Department of Agriculture Cooperating. All educational programs and materials available without discrimination on the basis of race, color, religion, national origin, sex, age, or disability. |
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Web updated 9/01/06 |