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The Importance of Understanding Product Labels: Reviewing Labels Improves Product Performance

March 23, 2010

The golf season will soon be getting underway as most golf courses in the state are preparing to open. The start of another season signifies the beginning of pest and disease pressure. Areas affected by gray snow mold should begin to recover as the grass begins to grow. Pressure from other mild weather diseases such as pink snow mold and cool-season brown patch will persist longer into the spring. As you prepare your plant protectants, be sure to revisit the product label as this information can change over time.

Editor’s note: The remainder of this article was submitted by Todd Burkdoll, BASF Professional Turf & Ornamentals Technical Specialist.

Product labels aren’t the type of reading material that you can snuggle up with—but they’re also not the kind you can ignore or just skim through before filing away.

Labels deserve routine attention beyond the one-time, quick read after purchase. However, it can be common practice to follow use recommendations from colleagues and distributors without analyzing the important details explained on the product’s label. But doing so can save money, prevent injury and help grow better turfgrass by ensuring product performance.

Most people using fungicides, herbicides and insecticides only ask themselves, “What product do I need to control the weed, insect or disease and what rate do I apply?” Rate information is essential, but labels provide a technical breakdown and need-to-know information prior to application. Here are five key areas to read on a label:

1. Mix Mindfully
The tank mixing section of a label lays out exactly how to combine a product with other additives. Glazing over these guidelines can create an un-usable compound, clog application equipment and reduce efficacy.

The basic rule of thumb—mix dry materials first, then add liquids—may not ring true for all products. One must be mindful of variances between generic and patented formulas and know that even though an active ingredient may be the same, its formula could require different a mixing order. So don’t rely on old standards—get up to speed on the label’s specifics before adding each product to the tank.

2. Follow Special Statements
Special statements on a label clearly communicate how to use a product for particular conditions. In uncontrolled climates, weather is an important variable to consider.

Be sure to make note of the rainfast or drying times mentioned in a special statement or you may lose your valuable pest control efforts to precipitation. Retain product effectiveness by making sure spray technicians are also in-the-know about circumstances included in the special statements section.

3. Get to Know Group Numbers
Group numbers help avoid the risk of disease resistance by identifying which fungicides, herbicides and insecticide products operate under the same mode of action. Usually included on the first page of a label, group numbers make it easy to organize products with different modes of action into a rotation program. For example, if you notice signs of resistance after using a fungicide in Group 1, try using a product with a different group number in the next application.

4. Acknowledge Agricultural Use Requirements
Agricultural and non-agricultural use requirements on product labels are important and vary depending on product use. A greenhouse or nursery employee, for instance, may use the same product as a turf professional, but has to abide by a completely different set of rules with regard to protective equipment and re-entry interval. Failing to read this section of a label could harm employees, turf or plants and the environment.

5. Follow restrictions and limitations
Carefully read the “general restrictions and limitations” section on your product labels. Knowing the “do not” statements list can mean the difference between having healthy turf and plants—or damaging an entire fairway or landscape bed with poor application practices. Brushing up on labels you haven’t read since last year can make all the difference.

General suggestions
Making a 10-15 minute investment in reading a label can save a lot of time and hassle compared with the fallout of misusing a product. Schedule a label date once a year where you can carefully re-familiarize yourself with old labels and dissect the details of new updated labels. The best place to obtain current labels is www.cdms.net.

Todd Burkdoll is a Technical Specialist in the Western U.S. for BASF Professional Turf & Ornamentals. Todd can be reached at james.burkdoll@basf.com.

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Name That Patch – Early Spring Brown Spots

March 28, 2011

Parts of the Midwest are getting hit with another round of snow but there is no denying that spring continues to inch closer by the day. In fact, before this last blast of winter weather, spring activities were slowly getting underway. Trees were beginning to break dormancy, bulbs were peaking through the soil, and lawns were starting to green up.

This process has already started across parts of the Midwest and some of you may have noticed patches, or areas of brown in your lawn. It’s typical to receive a number of questions from your clients about the cause of these brown spots during spring green-up. There are a number of reasons why these patches can appear and this article will address some of the most common reasons and discuss what action, if any, is needed to remedy the situation.

Dormant warm-season grasses
Most lawns in the upper Midwest contain cool-season grasses like Kentucky bluegrass, perennial ryegrass, and tall and fine fescues. Occasionally lawns, or parts of the lawn, will contain warm-season grass species. Examples of these could include zoysiagrass, buffalograss, or nimblewill. Whereas cool-season grasses grow best in the spring and fall, warm-season grasses prefer the mid-summer months and will remain dormant (brown) longer into the spring until warmer temperatures arrive.

If zoysiagrass or buffalograss are the cause of your brown spot there isn’t much you can do other than exercise patience until warmer weather arrives. Nimblewill can be selectively controlled with Tenacity herbicide. Tenacity herbicide will be made available to homeowners later this spring. Consult a lawn care professional for more information about Tenacity herbicide.
 

Dormant patches of nimblewill are very noticeable early in the spring.  Nimblewill can be selectively controlled with Tenacity herbicide.  Consult with a lawn care professional about the availability and use of Tenacity herbicide.

 

Warm-season grasses such as buffalograss are still brown while cool-season grasses such a fine fescues begin to green-up.

Leftover annual grassy weeds
Annual weeds such as crabgrass are always a concern and last year they seemed to be particularly troublesome. In lawns that had severe outbreaks, some of these annual grassy weeds may still be present. The good news is that you don’t have to worry about controlling leftover annual weeds. They have completed their lifecycle and are no longer alive. They did however drop seed and you may consider using a pre-emergence herbicide for the upcoming season.

 

Goosegrass, an annual grassy weed, is still present from the previous growing season. 

Snow molds
Damage from pink and gray snow mold is most evident shortly after the snow melts. The grass will usually appear off-color and be matted down. Chemical applications to control snow molds in the spring are seldom recommended as most of the damage has already taken place. You can help your lawn by raking up the matted areas of grass with a leaf rake. Chances are there is some live turf hiding underneath. The picture below shows an area of gray snow mold on the Iowa State University central campus.

 

Gray snow mold on the Iowa State University campus. 

Dog spots
Damage from animal urine will definitely create brown spots in the lawn. Where you can usually count on some recovery from snow mold damage, dog spots are very effective at killing grass. The best course of action is to remove the dead grass, break up the soil with a hand trowel or rake and re-seed the area. Note: Seed will not germinate and grow if a pre-emergence herbicide is to be used. The exception to this rule is when Tenacity or Siduron herbicides are used. Consult with a lawn care professional for more information about these products.

 

Man's best friend.  Undoubtedly charming, but damaging to grasses.

Salt damage
De-icing materials that contain sodium can be quite harmful to turf. Brown patches or areas of turf along driveways, sidewalks, or streets could be caused from salt damage. Depending on the severity of damage, reseeding may be necessary. Aerification and watering (or rainfall) can help flush salts through the soil profile and improve the conditions of the site.

Marcus Jones
Graduate Research Assistant

Nick Dunlap
Undergraduate Research Assistant

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