The parsley worm is a very large, two-inch long, green caterpillar with yellow-dotted black bands across each body segment. It has a pair of orange horns that it can project to scare off enemies. The beautiful black-and-yellow swallowtail butterfly is the adult form of the parsley worm. The parsley worm eats the leaves and stems…
Praying mantids (plural praying mantis) are mostly beneficial insects. Praying mantids eat aphids, asparagus beetles, caterpillars, Colorado potato beetles, earwigs, leafhoppers, Mexican bean beetles, and squash bugs. Praying mantids also eat beneficial insects, butterflies, and bees. The praying mantid is a beneficial insect sometimes known as the “destroyer of other insects.” Praying mantises eat an…
Green lacewings are beneficial insects. Adult lacewings feed on nectar, pollen, and aphid honeydew. Young, larvae lacewings feed on the eggs and immature stages of many soft-bodied insect pests including aphids, asparagus beetle larvae, caterpillar eggs and young caterpillars, Colorado potato beetle larvae, spider mites, thrips, whiteflies, leafhoppers, and the eggs of pest moths and…
Nematodes are microscopic soil-dwelling worms, many less than 1/16-inch long. There are beneficial nematodes and pest nematodes. Beneficial nematodes help turn organic matter into plant nutrients. They also prey on soil-dwelling plant pests such as white grubs and root maggots. Pest nematodes feed on plant roots, stunting and sometimes killing plants including many vegetables. Nematodes…
The honey bee is a beneficial insect and an important pollinator in the garden. Honey bees also produce honey and wax. About one-third of the human diet depends on honey bee pollination. Honey bees are important pollinators for more than 100 food crops. Honey bees collect water and gather pollen and nectar from flowers. As…
Parasitic wasps are small, even minute, mini-wasps that control pests including many garden pests. Parasitic wasps kill their hosts by feeding on them. Pests controlled by parasitic wasps include aphids, beetles, caterpillars, flies, sawflies, and scale insects. Notable parasitic wasps are the Braconid wasp, the Chalcid wasp, the Ichneumon wasp, and the Trichogramma wasp. Parasitic…
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