Green Lacewings: Eat, Prey, Love Biocontrol
We've added a new insect delicacy to the menu for the dwellers in our Spider Pavilion. That's right, usually the ladies (and few gents), that call the spider pavilion home, get fed butterflies, crickets, and flies, but as of this week we've added green lacewings!
Whitebanded Crab Spider, Misumenoides formosipes, getting ready to eat a Green Lacewing, Chrysoperla rufilabris.
Green lacewings, belong to the insect order Neuroptera, also known as nerve-wings. Not only does this mean that most people have never heard of them, it also means they have complex designs, or "nerves" in their wings. Some might think that this translates into flying well, but alas, this group of insects are notoriously poor fliers. However, what they lack in flight, they make up for in mouthparts. Big scary-looking mouthparts! Especially, if you're a small soft-bodied garden pest. I mean, check out the green lacewing's cousin the dobsonfly. Those are some killer mouthparts!
Male Dobsonfly, Corydalus cornutus, photo by Dehaan
Immature green lacewings (aka aphidlions) are such good predators, they have to lay their eggs on stalks, or they'd get cannibalized!
Not a very good picture, but you get the idea!
Gardeners and farmers have learned to capitilize on the lacewing's voracious appetite, by using them as biological control agents. They eat, on average, 200 aphids a week, and can also be found eating other insect eggs, mealybugs, thrips, immature whiteflies, and even small caterpillars. So next time you have a pest infestation in your garden, hope you have some Green Lacewings out there making friends with those ladybugs!