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Description of Pseudogonatopus nudus Perkins

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Economic importance: Parasitoid and predator.
Hosts: Planthopper nymphs.
Description
1. Pseudogonatopus nudus is a reddish brown wasp except for its black petiole. Its appearance is ant- like. The sides of its metanotum are protruding. Its metathorax and propodeum are without median furrows. It has enlarged claws with a sub-apical tooth and six lamellae.
2. The male adults of P. nudus are winged, whereas the females are wingless.
Biology and ecology
1. The female wasp lives for 6 to 7 days. It can parasitize as many as 4 to 10 nymphs per day. A single host can accommodate 1 to 2 eggs of the parasite. After 1 to 2 days, eggs hatch into larvae.
2. The larva uses the host’s body fluids for its development. During larval growth, a black to gray sac covers the larva and protrudes from the host’s abdomen.
3. The sac tears in 7 to 10 days and the whitish larva wiggles free. During pupation, it secretes a whitish oval silk cocoon to cover the pupa on the plant. The flat cocoon turns reddish brown with age.
4. Pseudogonatopus nudus is also predaceous on planthoppers.

File Courtesy: 
http://www.knowledgebank.irri.org/ipm/index.php/predators/117-scientific-name-pseudogonatopus-nudus-perkins
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