question is about a well-established lemon tree. The fruits, even
when they are green, get a whitish mark all over them. The tree
produces tonnes of fruit but it is useless for making lemon curd.
What can I do to fix this? It has happened for about four years.
Is there a safe spray to use on fruit?
tree is suffering from citrus verrucossis. It is a common problem
when the weather is cool and wet. This fungal disease infects the
fruit when it is young. It is safe to spray with a copper-based
fungicide as the fruit begins to develop in the late summer and
Gardener, Issue 98, 2002, Page 20
Reproduced with permission from the former Weekend Gardener magazine. The views expressed here are not necessarily those of the RNZIH.