It is significant for growers given the expiry of approval for Bayer's Aliette (fosetyl-aluminium), leaving growers only one chemical control, BASF's Paraat (dimethomorph) with only one permitted application per year.
Recent projects led by Dr Angela Berrie of East Malling Research found that Fenomenal applied as a drench is as effective as the two previous standard controls. "Aliette was so effective that growers had stopped treating for red core, which allowed a resurgence from the very wet late summer and autumn of 2010," she said.
"That was a reminder that this pathogen (Phytophthora fragariae) can survive in the soil for 30 years or more. Last year was also exceptionally wet for most of the summer and autumn so there may be more problems this spring."
Hutchinsons agronomist Andrew Taylor added: "I will be recommending Fenomenal for use where plant material has been frosted or waterlogged."
Fenomenal is recommended as a pre-transplantation dip, post-transplantation drench or foliar spray. A maximum of two applications are allowed per year, including one foliar spray. The latest date of application is 35 days before harvest.