Posted: 01/06/2014 at 15:25
If the leaves still look good and healthy, it might just have got a bit dry at a critical stage when the fruit set. If so, the crop will be poor this year but the bush should be fine. If the leaves look a bit small or sick, then further investigation may be needed - I lost one of mine earlier this year as the pot had become a bit waterlogged - when I gave the stem a gentle tug, the bush came up and I could see most of the roots had rotted. While they don't like drying out, waterlogging will kill them. The other possibility if leaves are affected is vine weevil, but you'd probably need to tip it out of the pot to look for the C-shaped white grubs.