Written by cpm
Download PDF Foliar-applied maleic hydrazide is set to become an important foundation in potato sprout control programmes after the withdrawal of chlorpropham (CIPC). CPM seeks some expert advice on getting the most out of the active ingredient this season. For those switching to MH this year, it’s all about timing. By Lucy de la Pasture and Rob Jones Many growers will be using maleic hydrazide (MH) for sprout control for the first time this year and experienced users stress that planning ahead is critical to its success. Ensuring MH application hits the optimum timing, while climatic conditions at spraying are favourable, isn’t always easy to achieve in practice. The 2020-21 storage period will be the first without CIPC as an in-store treatment for decades, so many will be entering unknown territory – particularly those storing processing crops long-term where temperature can’t be brought down to help control sprouting. Norfolk-based independent potato storage expert Tim Kitson says that untreated crops going into store will be a worry without CIPC to get growers out of trouble. Alternatives like ethylene, spearmint oil and the soon-to-be-approved DMN are all, to varying degrees, more expensive than CIPC on a per tonne basis according to AHDB…
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