BOTRY-Zen® WP (Wettable Powder) formulation is a biological control agent for foliar spray application to grapes, black currants, ornamental flowers to control Botrytis cinerea or to kiwifruit for the control of Sclerotinia sclerotiorum. The development of BOTRY-Zen® WP has been made by a team of scientists from Plant and Food Research, New Zealand.

The active ingredient consists of a live spore preparation of the non-pathogenic saprophytic fungus Ulocladium oudemansii. Initially marketed in its granulated formulation, BOTRY-Zen® has been through extensive trialling since 1997, proving its efficacy under heavy Botrytis and Sclerotinia pressure. 

BOTRY-Zen® competes for the same ecological niche as other pathogenic diseases, specifically Botrytis cinerea and Sclerotinia sclerotiorum. It’s ability to compete for nutrients and physical space allows it to become the primary colonizer of dead and senescing material; displacing disease-causing pathogens that would have otherwise colonized first.

BOTRY-Zen® WP has an 18- month long shelf life; longer than the granulated formula. There is also no requirement for refrigeration making it attractive to retailers and wholesale buyers. It is however recommended to be stored in a cool dark place.

Watch how BOTRY-Zen® is made.