Old 09-01-2015, 10:06 PM
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RigglePLC RigglePLC is offline
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Join Date: Jul 2006
Location: Grand Rapids MI
Posts: 10,598
spotted spurge vs herbicide

Spotted spurge is one of the most prolific and tough to kill weeds. At this late summer time of year spurge is blooming and going to seed so the growing point is not affected by herbidides. We wanted to determine if mixtures containing carfentrazone or sulfentrazone would be helpful. These products work fast in sunny hot weather. The spurge was spot treated with small hand sprayers at 4 pm and results were recorded at 8 pm. The soil was moist due to rain 3 days ago, and the temperature started out at 90 degrees. We used an estimated 1 gallon per thousand at the high label rate. The first two treatments, sprayed twice over, were therefore probably above label rate, which is not allowed, of course.

2X Surge+2XSpeedzone Excellent, best
2X Surge Excellent
Surge+Speedzone+T-Zone Fair plus
Surge+Speedzone Fair
Surge +T-Zone Poor
Quicksilver Poor

In the effective treatments, the leaves of the spurge plants turned a flat green, and looked collapsed, after 2 hours.
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Old 09-01-2015, 10:57 PM
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foreplease foreplease is offline
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Join Date: May 2008
Location: St. Joseph, MI
Posts: 1,647
I moved it to other thread with pics.
Michigan PABL
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