My quince trees have just started flowering. For the past 7 years I've not been able to eat a single one because of insects stinging the fruit. The fruit is always full of worms.
Obviously I need to wait for pollination to have occurred before doing anything.
What is the best thing to do? Do I spray an insecticide? When do I spray? What non-insecticide alternatives are there?
I am aware of the plight of they honey bee, so I would prefer something that deters the insects from coming to the tree, rather than something that kills them. And the insects are only a problem when there is fruit on the tree. Of course, they are needed for pollination.
I'm not able to provide photos of the actual problem right now. I'm trying to prevent it from being a problem this season.
I have three trees, they're about 3m tall, about 1.5m in diameter. They're quite bushy, almost hedgy, but that's because they've not been pruned properly. They bare fruit about the size of apples, so it's not the ornamental variety.