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Control of two johnsongrass biotypes in Michigan with selective and non-selective herbicides



Control of two johnsongrass biotypes in Michigan with selective and non-selective herbicides



Proceedings, North Central Weed Control Conference (Vol.40): 1



Physical characteristics of distinct Sorghum halepense biotypes from the north and south of the state are described briefly. In field experiments, 0.84 and 1.68 kg glyphosate, SC-0224 (trimethylsulphonium carboxymethylaminomethyl phosphonate) and Hoe 661 ha controlled the northern biotype best when applied in 280 litres spray/ha and the southern biotype in 140 litres/ha. Treatment at the boot to head stage was more effective than when the plants were 45-60 cm high in the case of both biotypes.

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Accession: 001554864

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