Thripoctenus javae (=Thripobius javae / T. semiluteus); parasitoid against greenhouse thrips
adult wasps are ± 0.6 mm. They have a black head and black thorax. The abdomen is yellow with dark spots and also the legs and antennae are yellow. Males are not known for Thripoctenus. Thrips larvae that are parasitized change shape; the body of the new parasotoid becomes visible. When full-grown the parasitoid larva inside the thrips causes the thrips to turn black. In the resulting pupa the shape of the new wasp can already be recognized. These pupae often are found in groups on the underside of the leaves. The parasitic wasp comes out by lacerating the pupal cocoon.
Mode of action:
Thripoctenus parasitizes mainly small thrips larvae. A female lays one egg per larva. Thripoctenus is less effective in the presence of ants.
is especially effective against the banded greenhouse thrips (Heliothrips haemorrhoidalis) that is often found in zoos and botanical gardens. Other thrips species, like the black one Hercinothrips femoralis will be parasitized to a lesser extent. The cards with pupae of the wasp can be hung in the plant. Can also in greenhouses and other indoor plantations successfully used. Consider multiple repeated introductions. The product is sensitive to various chemical pesticides. Ask for advice on introduction strategy.
effect of Thripoctenus javae:
- parasitize mainly small thrips larvae
- female lays one egg per thrips larva
- first parasitized thripses visible within several weeks
- mainly on underside of leaves
- less effective in the presence of ants
The product Thripoctenus javae:
Product: 100 pupae of the wasp spread over 4 small paper cards
Shelf life: a maximum of 2 days at 10-15 ° C.
Climate: especially effective at higher temperatures (18-30 ° C) and much light. The humidity is less critical.
Targets Thripoctenus javae:
- greenhouse thrips Heliothrips haemorrhoidalis