Cheminova, Inc.

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Dr. James Barrentine, formerly head of the Department of Crop, Soil, and Environmental Sciences at the University of Arkansas, is Director of Technical Services for Cheminova, Incorporated He has been a key player in the development of numerous crop protection products and is recognized throughout the industry as a consummate professional. Dr. Barrentine is a past president of both the Southern Weed Science Society and the Weed Science Society of America, and in 1998, was given that organization's Outstanding Industry Member award. He has both a B.S. and M.S. degree in agronomy from the University of Arkansas and holds a Ph.D. in weed science from Purdue University. Click on an question below to view the answer. TOPGUARD™ is an Asian Soybean Rust fungicide that has been exempted from registration for emergency purposes to address soybean rust in selected states. TOPGUARD™ is sold in the United States by Cheminova, Incorporated This product has provided very effective control of soybean rust in other parts of the world, such as Brazil. TOPGUARD™ has both curative and preventive activities, which means it provides control once the infection starts and protects the soybean plant throughout the growing season at the same time. It provides excellent protection of the soybean plant and preserves the crop's yield potential. TOPGUARD™ has very good systemic activity, absorbs readily, translocates through the plant and protects new leaves as they emerge. -Why do growers need a fungicide like TOPGUARD™ when there are several other materials already available for controlling soybean rust? For one thing, the effectiveness of TOPGUARD™ has already been proven in areas where soybean rust is a serious problem. But TOPGUARD™ has several additional features that growers will like. For example, it is formulated in a way that makes it both easy to manage and easy on application equipment. This fungicide provides a very high level of rust control and plant protection. It also has good residual control of at least 21 days which, depending on the timing of infection, may allow growers to make only one application. And TOPGUARD™ has the ability to get into the plant quickly and protect young leaves very effectively. It can be tank mixed with other fungicides for late season diseases and even with insecticides and herbicides. -TOPGUARD™ has both curative and preventive properties. Why is that important to me? TOPGUARD™ does have both curative and preventative (some people say protective) properties. This is important because there may not always be an opportunity to apply a fungicide before soybean rust is visible. And while you can never let rust levels get very high, this is a disease that's sometimes hard to detect. But TOPGUARD™ will provide control when applied in a timely manner. And because it has systemic activity, it also protects the new, uninfected leaves as they unfold. So it's easy to see that you want a product that has both of these properties when you select a soybean rust fungicide.

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