I notice that my Victoria plum trees have a very sticky substance on leaves and fruit. Could you please let me know what is causing this and if there is anything I can do now to remove it. There is a very heavy crop which I have already thinned.
These may need to be controlled with an insecticide, if the tree is not too big, but usually they disappear about mid-summer, predators and parasites having arrived.
Keep under review.