Franklinothrips vespiformis; predatory thrips against leaf dwelling thrips species
females of the predatory thrips Franklinothrips vespiformis are black with a light band at the waist. Males are rare. Predatory thrips are about 2 mm in size and look like ants. Larvae of predatory thrips are first transparent white and then bright red. Pupae are usually found along leaf veins on the underside of the leaf under a white fleece-like skin.
Mode of action:
Both larvae and adult predatory thrips are active runners and robbers. They are searching very actively for their prey, which consists of larval and adult stages of harmful leaf-dwelling thrips and suck it dry. Also active in non-flowering plants, where often other natural enemies of thrips fail in controlling thrips.
is used in greenhouses and indoor plantscapes against multiple species of trips, especially zebra thips (Parthenothrips dracaenae) and American thrips (Echinothrips americanus). Other thrips species however are also eaten, especially leaf-dwelling species. Consider multiple repeated introductions. The product is sensitive to various chemical pesticides. the buckwheat hulls containing the predatory thrips are spread across the affected leaves. In plants where the buckwheat hulls will fall off, scraps of paper with predatory thrips can be used as carrier. Ask advice for optimal introduction strategy.
effect of Franklinothrips vespiformis:
- larvae and adult predatory thrips are active searchers for prey
- prey consists of larval and adult stages of harmful thrips
- preference for leaf-dwelling thrips
- also active in non-flowering plants
- population build-up takes time, at least 5-6 weeks
- young stages hard to find in the crop
The product Franklinothrips vespiformis:
Product: 250 or 500 adult predatory thrips per bottle on buckwheat or shredded paper.
Shelf life: maximum 2 days at 10-15°C.
Climate: Franklinothrips is not very critical towards temperature and humidity. The temperature should be regularly above18 ° C. In winter Franklinothrips seems less effective, but the species has no real winter diapause.
Targets Franklinothrips vespiformis:
- western flower thrips
- Parthenothrips dracaenae
- banded greenhouse thrips
- orchid thrips