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Non-Tech : Farming -- Ignore unavailable to you. Want to Upgrade?

To: Rarebird who wrote (1083)	5/7/2008 1:23:09 PM
From: Snowshoe	Respond to of 4448

Leaf rust poses serious threat to Kansas wheat crop stjoenews.net Sunday, May 4, 2008 Kansas Wheat Association warned its members last week about increasing chances of wheat disease across the state. The risk of significant yield losses from leaf rust and other foliar diseases has increased dramatically in past week, according to K-State Extension Wheat Plant Pathologist Erick DeWolf. Leaf rust was discovered in commercial fields and variety demonstration plots in Sumner County on April 24. The current presence of even low levels of leaf rust and severe powdery mildew suggests that potential for yield loss is significant. Yield losses of greater than 35 percent can be expected if the leaf rust and powdery mildew move onto the flag leaves of susceptible varieties prior to flowering. Varieties that are resistant to leaf rust will not have this much yield loss from leaf rust, but may still be vulnerable to powdery mildew or other diseases. Wheat fields in southern Kansas should be checked for symptoms of disease and to verify growth stage as soon as possible. Wheat in the central and north central districts of Kansas will be at critical growth stages within two weeks. The most effective timing for fungicide applications is between flag leaf emergence and heading. It is important not to apply the fungicide too early. Producers should wait until wheat has reached the optimal window for application.