Turfgrass Chemical Update: Fungicides

Staying ahead of turf disease is always a challenge. Fortunately, manufacturers continue to develop a wide array of fungicidal products that help you combat turf pathogens. To help you keep track of the chemical tools at your disposal, we annually revise our "Turfgrass Chemical Updates," bringing you the best information available for your pest-control planning.

This is the third and final segment of our 1997 "Updates," covering all fungicides registered for turf-disease control. (The January and February "Updates" covered herbicides and insecticides, respectively.) It can help you design an effective disease-management program by providing you with detailed label information. And so you are aware of the latest introductions, we list new chemicals in blue type.

Correct identification is the first step in disease control. After correctly identifying a pathogen, you then can decide on appropriate control measures. As you'll see in the "Update" tables, diseases are cross-referenced with products you can use for their control. In addition, you'll notice that the tables list fungicides as preventive or curative (or both). Thus, the "Update" tables provide you with key information you need to decide which products may be suitable.

Chemical rotation is an important aspect of resistance prevention. We list the chemical group to which each fungicide belongs so you easily can design a program that utilizes products from different chemical classes. We also tell you whether each fungicide is a systemic or a contact product. Knowing these factors allows you to create a program that minimizes the development of resistance and maximizes effectiveness.

Unique aspects of your operation may dictate your disease-control decisions. Would it be useful if you could use a product on ornamentals as well as turf? Is a particular chemical available in a formulation compatible with your equipment? The "Update" tables are designed to provide you with answers to these questions in an easy-to-understand format.

Notice that we list chemicals by common name. We do this because some chemicals are available from several manufacturers under various brand names. Although this can be confusing, you'll find a table listing the manufacturer(s) and brand name(s) of each fungicide (page 58) to make it easier to find a source for a product.

When using the "Update," remember that these tables depict what's available for a chemical, not specific brands. For example, a particular formulation, or labeling for a specific disease or turfgrass, may not be available from all formulators using the same active ingredient. Therefore, be sure you read the manufacturer's product label for specific information about the use of that particular brand.

As with all pesticides, you must follow all label instructions. Manufacturers can answer questions you may have if the label seems vague to you. Because labels change frequently, read the entire label each time you purchase a new package. Use these tables for preliminary planning only.

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