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| Publication Type:
| Newsletter |
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| Author(s): | Farrant, Gary |
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| Author Affiliation: | Lake Perry CC |
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| Title: | Know what's in your sand |
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| Source: | Turf Times. Vol. 20, No. 8, July Quarterly 1991, p. 4. |
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| Publishing Information: | Traverse City, MI: Northern Michigan Turf Managers Association |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: Atrazine; Topdressing; Herbicide injury; Herbicide concentrations; Herbicide resistance; Water quality; Golf courses in the environment
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| Abstract/Contents: | The greens were dying at Lake Perry Country Club. Symptoms were: (1) In the early stages, spots that resembled fungus damage. They were small circular areas that stopped growing, like dry spots, but with a moist root zone. (2) The greens took on a pale yellow cast, and they did not respond to iron, fertilizer or irrigation. (3) The leaves grew increasingly slim and started to curl at the top. (4) You could stand on the greens and see soil. (5) Weak areas and low greens were hard hit; the clean-up laps and low greens with little air movement were by far the hardest hit; the higher greens showed very little damage. (6) Injured grass never recovered. (7) The dragging process injured them the most, and the clean-up laps were the most hurt. (8) The two greens that died did so after they were verti-drained in the spring, and dragged. After they were top-dressed, about three days later they had a purple hue that was attributed to dragging injury. (9) The problem spots started as purplish spots that would come in and out, but once they turned straw colored, they were dead. It was different than dome pythium damage, which they'd had before. (10) A sort of black layer developed, but it was an effect rather than a cause. (11) The algae moved right into the weak areas as soon as they statrted having problems. (12) After they aerated August and sand topdressed heavier than ever before, almost all the greens died. The problem was a small amount of Atrazine in the sand. They found out after talking to the Corp of Engineers, the Topeka Water Treatment Plant and the Kansas Dept. of Health and Environment that there was some Atrazine in Lake Perry and Kansas River. After the greens were sand topdressed, heavy rains and cool weather probably minimized the damage. Jeff Nuss, who reports on his study of irrigation applied Atrazine in the February issue of GCM, says that about .06 ppm would kill seedlings, and .09 ppm would kill mature bent. All the sand that was used for topdressing came from the Kansas River. The sand tested from .02 to .09 ppm. Topeka drinking water went as high as 15 ppm. Their water treatment plant couldn't filter Atrazine. Water from Lake Perry that was used for irrigation, tested from .02 to .06 ppm. Farmers apply Atrazine in the early spring. The sand company is going to stockpile sand with low levels of Atrazine in early spring just for golf greens. |
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| Language: | English |
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| References: | 0 |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Farrant, G. 1991. Know what's in your sand. Turf Times. 20(8):p. 4. |
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MSU catalog number: SB 433 .A1 N572 |
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