Set the container in a shady spot in the garden. Mist frequently with water or the beetles will become dehydrated and die. This sticks their wings together. Open the box and add some aphid-infested twigs. The next morning, mist the surrounding foliage with water and tap any beetles that are still in the box onto a nearby branch.
Nematodes are microscopic roundworms.
Earthworms are not harmed. Challenges to date have been in rearing and shipping parasitic nematodes, as well as improving application methods. Current research focuses on matching parasitic nematodes with environmental conditions, soil temperature and the pest to be controlled. Others remain active down to 50 degrees Fahrenheit and are more viable in cooler climates. Nematodes are generally mixed in a bucket of water and applied to soil with a sprinkling can.