05-12-2019, 12:05 PM
From personal experience, I think you will find that even if you release 100's or even 1000's, they will disperse very quickly. The don't live together in large numbers even if there is plenty of "food" (aphids, etc.) around. In a week's time you'll probably find that they have all vanished. Its a great idea on paper, but it just doesn't work.