Q. "2 days ago I sprayed my apple tree with Provado fruit & veg. bug killer. How soon can I order and use lacewing larvae on the tree?" Wendy Mitchell
A. Thanks for the message and I have checked on the website and although it is an insecticide, it breaks down in sunlight within a few days, so I would leave it 7 days before introducing Lacewing Larvae. CLICK HERE to find out more about Lacewing Larvae.