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Control of Californian thistle and yarrow in asparagus with clopyralid



Control of Californian thistle and yarrow in asparagus with clopyralid



Proceedings of the thirty ninth New Zealand Weed and Pest Control Conference: 207-210



In field trials, 34 growers applied 0.15-0.3 kg clopyralid/ha over emerging spears of asparagus to control dense infestations of Californian thistle (Cirsium arvense) and yarrow (Achillea millefolium). At all but 2 sites clopyralid had virtually no effects on spears. 1-3 applications of clopyralid reduced the av. cover of Californian thistle from 66% in the 1st year to 17% the next.

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Accession: 001554306

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