Rhyzobius lophanthae is about 2 mm in size, a black beetle with brown hairs all over the body. The head and thorax are dark orange. The larvae are gray with a light longitudinal stripe on the body and with little hair. Pupae are more or less round and orange brown. They are hard to find. When an armoured scale is preyed upon, the scale cover shows an irregularly shaped hole at its edge.
Mode of Action:
Both larvae and adults of Rhyzobius lophanthae prey upon armoured scales but larvae eat mainly smaller stages. Feeding lines are visible as irregular holes at the edge of the scale cover. In contrast to Chilocorus nigritus the predator Rhyzobius lophanthae is less able to eat scale insects with a hard scale cover.
Rhyzobius lophanthae is used in greenhouses and indoor plantings against various types of scale insects. Consider repeated introductions. The product is sensitive to various chemical pesticides. Ask for advice deployment strategy.
effect of Rhyzobius lophanthae
- both larvae and adults prey on scale insects
- larvae eat mainly smaller stages
- feeding lines visible as irregular holes at the edge of the scale cover
- Rhyzobius lophanthae is less able to eat scale insects with a hard scale cover than Chilocorus nigritus
The product Rhyzobius lophanthae
Product: transparent vial of 40 ml with 25 beetles or a paper bag with 100 adult beetles.
Shelf life: maximum 2 days at 10-15°C
Climate: the optimum temperature is 22-26 ° C, but the product can also be used at lower temperatures. Rhyzobius lophanthae is also effective at lower humidity