Females of Metaphycus flavus are nearly 1 mm long and are yellow in color. Males are very similar to females, but are usually slightly smaller and have a darker abdomen. Soft scales that are parasitized by Metaphycus flavus can be identified by one or a plurality of dark rings under the shield around the parasitoid larvae. Within this ring is the pupa of the pararsitoid wasp. When fullgrown the young wasp will crawl out through a hole at the end of the pupa.
Mode of Action:
Metaphyucus flavus can parasitize small as well as larger stages of soft scale. Depending on the size of the scale a female lays one or more eggs into it. Adult parasitoid wasps feed mainly by puncturing younger stages of the soft scales and suck them empty. This will kill the soft scales (host feeding).
Metaphycus flavus can be used in greenhouses, nurseries and indoor plantscapes against brown soft scale (Coccus hesperidum), hemispherical scale (Saissetia coffeae), and black scale (Saissetia oleae). The temperature must be at least 18 ⁰C. Consider repeated introductions. The product is sensitive to various chemical pesticides.
Effect of Metaphycus flavus
- parasitizes small as well as medium stages of soft scale
- female may lay one or more eggs per scale depending on size
- Host feeding on small stages of soft scale
The product Metaphycus flavus
transparent vial of 40 ml with 25 or 100 adult parasitoids.
maximum 2 days at 10-15°C.
Effective between 18 and 30 ⁰C, optimum at 25 ⁰, does not make high demands on the air humidity.