When we moved in to our new house we were delighted to inherit dozens of currant and gooseberry bushes. I should have taken more heed of my vintage gardening book, How to Prune Fruit Trees, as the gooseberry bushes were in no fit shape to render mature fruits. They have developed a furry white powder mildew, also known as American gooseberry mildew.
These bushes are very old and seem to have remained unpruned for a few years. We will tackle the mildew in a number of steps:
– Remove infected branches now
– In winter, remove all old wood branches down to the ground
– Keep this year’s branches, as they will provide fruit next year
– Aim for goblet shaped bush with ample circulation between branches
– Resist temptation to leave branches, resulting in more but smaller fruit
– In Spring remove all but 3 strongest shoots, removing others
– Keep ground free of weeds and well mulched
– If all else fails, re-plant with resistant varieties like Invicta
Have you had any experience with white furry mildew on your gooseberries?