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Type: Protein hydrolysate, Company: Plant Health Care


No effect on growth
No effect on other

ProAct treated Potato, var. Performer/Heraclea/Agria grown in the field had no significant difference in total number of plants (-0.4%), in total number of stems (-4.6%), in total number of tubers (+2.2%), in total yield (+4.2%), in yield between 45-85 mm (+2.8%), in tuber DM% (-2.8%, significant in variety Performer and Agria), in tuber DM yield (+0.8%), in mean tuber size (+1.6%), in tuber shape (+1%), in rotted yield (-35.9%), in sound yield (+5.9%), in rotted yield post-harvest (-1.9%), in tuber skinset after cement mixer treatment (+3.9%), in number of bruising after cement mixer treatment (-3.9%), tuber had a significant higher Ca concentration (+19.6%), no difference in black dot post storage (-0.7%) and no difference in sprouting post storage (-1%) compared to the untreated controls grown under the same conditions.

Trial details
outdoor, unprotected, soil grown (sandy loam soil; sandy silt loam soil; peat soil), normal agricultural practices


Potato, Solanum tuberosum L.

Trial application

Foliar spray
First treatment at the end of the tuber set, followed by 2 applications 21 and 42 days later
150 g/ha, 400 L/ha solution
Stalham, M.
Effect of ProAct and on blackleg incidence, yield and tuber quality in potatoes
Trial report Plant Health Care
Crop group