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How to treart red thread disease in lawn grass


By Waite

United Kingdom Gb

the lawn is showing patches of pink grass



First, you need to improve your drainage. Do this by spiking the lawn with a fork at approx 1 ft spacing. The soil fertility will then need to be improved, but do not use nitrogenous fertilisers after September, as this may encourage Fusarium wilt. A few fungicides are effective but avoid the ones containing mercury.
Immediately after mowing, Benomyl or thiophanate-methyl should be applied as an eradicant and/or preventative treatment, in accordance with mfrs. instructions.
Hope this helps. I seem to remember getting this question in an exam a few years ago.

2 Jul, 2009

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