The plums on my tree have shrivelled and dried up and are green,does this mean it has plum moth and are there any remedies?
Certified GKH Gardening Expert
This has two likely causes. The first would be underfertilization. I would make sure to apply a fruit tree fertilizer once per year, or a nitrogen based in spring, and switch to a high phosphorus and potassium fertilizer once the fruit start to form.
The second would be a fungal infection. This is common during wet seasons. Wettable sulfur, and dolomitic lime should be a once a year application, just to be sure, anyway. Add these if you, also, suspect a fungal infection.
This article will give you more information on the care of plum trees: https://www.gardeningknowhow.com/edible/fruits/plum/growing-plum-trees.htm