Parasitic Wasps: Garden Heroes—Identification & Life Cycle

Why Welcome Parasitic Wasps?

They parasitize aphids, scale, leafhoppers, caterpillars, roaches, flies, beetles, whiteflies, ticks. Not interested in humans.

Identification

• Family Hymenoptera (like bees/wasps).
• Size: tiny (egg-layers) to ~1 inch.
• Narrow "waist" (abdomen-thorax constriction).
• Usually 2 wing pairs (some wingless).
• Antennae short or long. Colors: brown, black, metallic green/blue, sometimes orange/yellow stripes.

Life Cycle

Complete metamorphosis: egg, larva, pupa, adult. Some species reproduce asexually. Generations per year vary.

Eggs & Larvae

• Females use ovipositor to lay eggs inside host insects (even hidden in bark/cocoons).
• Larvae develop inside or on host, eventually killing it. Exit to pupate or pupate inside dead host.

Encourage them by avoiding broad-spectrum pesticides.