5 ms·

Also roofed in gardens don't need pesticides...

• slapshot 11y ago
  You have clearly never dealt with a spider mite invasion. They. Are. Everywhere. They routine infest indoor houseplants, even in places you wouldn't expect. They'd find their way into a roof garden. And because most predators require a wider range than most prey, there may not be as many natural predators available. Commercial greenhouse growers definitely try to isolate their plants from invasion, but still rely on pest control when the inevitable happens.
  • fweespeech 11y ago
    http://www.amazon.com/000-Live-Adult-Predatory-Mites/dp/B00I0ZXU18 http://www.amazon.com/000-Live-Adult-Predatory-Mites/dp/B00I... Predatory mites work fine if other mites are the only problem. They aren't particularly expensive either. But yes, you can't use natural predators. You basically need to introduce them, let them do their jobs, and then most of the predators will die once the problem is controlled for. But give its a $50 problem, its not a very expensive problem and on par with pesticide costs.