LADYBUGS AND SO ON… Just one domestic ladybug will eat as many as 50 aphids a day (aphids are small green bugs that can kill plants in a few days, and reproduce like crazy). Sometimes called lady-beetles, these beneficial insects control most bug problems (The Asian ladybug can sometimes be a nuisance, though). Also beneficial, the larvae of the green lacewing devour thrips, spider mites, and whiteflies. We’ve used beneficial nematodes at home for years to control fleas in the dogs’ area. Put beneficial insects out at sunset so they can hide, and before hungry birds can get them.