Californian thistle management

13 February, 2017 by AgPest in Auckland, Bay of Plenty, Californian thistle, Canterbury, Gisborne, Hawke's Bay, Manawatu-Wanganui, Marlborough, Nelson/Tasman, Northland, Otago, Ruapehu, Southland, Taranaki, Taupo, Waikato, Weeds, Wellington, West Coast | Comments Off on Californian thistle management

Mowing Californian thistle during rainfall can improve control of this weed by 30% as compared to mowing during dry weather. Best time to do this “wet mowing” is in February/March when the fungi thought to be responsible for this effect are producing spores on the thistle. The effect is likely to be greatest if some members of the thistle population to be mowed are showing signs of disease (wilting, yellowing, dieback).

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