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Does ISTA require a fluorescence test in ryegrass samples?

April 26, 2017fluorescence ista require ryegrass samples Test

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Does ISTA require a fluorescence test in ryegrass samples?

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Fluorescence testing is voluntary under ISTA Rules. When this test is requested, the lab will perform the test and will report the test fluorescence, but does not apply the formula to estimate percent perennial or annual ryegrass. All ryegrass samples are reported as Lolium spp.