Cenopalpus pulcher(Canestrini and Fanzago)
A mite that is a serious fruit pest in Africa, Asia, and Europe has been found in Oregon, U.S.A., representing the first report of this species in the Western Hemisphere
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Name: Cenopalpus pulcher (Canestrini and Fanzago)
Animalia: Arthropoda: Arachnida: Acari: Tenuipalpidae
Common Names: flat scarlet mite
This is the first report of the flat scarlet mite, and the genus Cenopalpus, in North America. This mite is considered a pest of fruit trees in some parts of its native distribution.
Issues of Concern: The flat scarlet mite, Cenopalpus pulcher, was originally detected in Oregon in an experimenal orchard in 1990, but did not draw significant attention at that time. That orchard was subsequently abandoned, and the population has consequently increased in size. The mite has now been found in unmanaged trees in 7 northwestern Oregon counties (Washington, Multnomah, Clackams, Marion, Linn, Benton, and Polk). Unmanaged trees outside of managed orchards and nurseries are apparently most often infested.
An Oregon survey of 91 production nurseries in 9 counties was conducted in the summer of 2001. No flat scarlet mites were found. Survey of non-nursery sites in counties adjacent to those infested is planned starting November 2001.
The flat scarlet mite is most often dispersed on propagative (vegetative) material such as nursery stock or budwood, and is not spread via fruit, seed, or by wind. There is no indication that the mite has been transferred outside Oregon, but the potential for movement on budwood or scionwood, as well as nursery stock, should be considered.
An effective budwood treatment for the control of surface mites consists of dipping in 50oC water and surfactant for 5 minutes.
Hosts: quince (Cydonia oblonga); loquat (Eriobotrya sp.); walnut (Juglans regia, Juglans sp.); apple (Malus domestica, Malus sp.); Oriental sycamore (Platanus orientalis); apricot (Prunus armeniaca, Prunus sp.); prune (Prunus domestica); pomegranate (Punica granatum); pear (Pyrus communis, Pyrus sp.); willow (Salix sp.)
Vector(s)/Dispersal: No specific reference to disease or pathogen transmission was found for the flat scarlet mite.
Africa: Algeria; Egypt; Libya
Asia: Afghanistan; Cyprus; Iran; Israel; Lebanon; Syria; Soviet Central Asia; Turkey; India; Iraq
Europe: Austria; Bulgaria; Denmark; England; Holland; Germany; Italy; Portugal; USSR (Crimea, Georgia, Transcaucasia)
United States (Oregon)
Symptoms of C. pulcher infestation may be mistaken for nitrogen deficiency. Surveys during the growing season should look at leaves and flower bases. On fruit, they are predominantly found at the calyx end. These mites are slow moving, cryptic, and often found in crevices and damaged areas of trees.
USDA-APHIS New Pest Advisory Group Data Sheet (Nov 28, 2000)
Warning: The information in this archived item was not confirmed with the appropriate National Plant Protection Organization and is provided solely for informational purposes. Please use this information with caution.