They may also play dead. Birds are ladybugs' main predators, but they also fall victim to frogs, wasps, spiders, and dragonflies.

"Spiders are key predators of insects and can alleviate the need for farmers to spray large quantities of pesticide," Reynolds said.

The result of biomass of pests under spiders showed that the most suitable low-dose chemical pesticide could remarkablely increase the insect-controlling efficiency of paddy field spiders.