Euonymus scale, Unaspis euonymi (Comstock): host preference, and distribution of native and imported natural enemies in Virginia

Studies were conducted in 1992 and 1993 to determine which of six Euonymus species and cultivars would sustain the highest populations of Unaspis euonymi (Comstock), as a food source for Chilocorus kuwanae (Silvestri). Analysis of data collected from field-grown plants and container-grown plants indicates that Euonymus japonicus (Thunb.) 'Albo-marginatus' would sustain the highest populations of U. euonymi. In 1992 and 1993, surveys were conducted to determine the presence of existing natural enemies in Virginia as well as to determine the establishment of the imported predator, Chilocarus kuwanae. In 1992, C. kuwanae and parasites from the genera Aspidiatiphagus and Encarsia was found at several locations in Virginia Beach. In 1993, C. kuvanae was recovered in seven of the twelve Virginia counties surveyed. Either Aspidiotiphagus or Encarsia were found in nine of the twelve counties. A single specimen of Cybocephalus sp. was recovered from a sample taken in Fredericksburg.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

masters

Discipline thesis:degree_discipline

Entomology

Department dc:contributor.department

Entomology

Grantor dc:publisher

Virginia Tech

Year dc:date.issued

1994

Author dc:creator

• Jefferson, David Kirk

Chair dc:contributor.committeechair

• Schultz, Peter B.

Committee members dc:contributor.committeemember

• Pfeiffer, Douglas G.
• Kosztarab, Michael

Statement dc:rights

• In Copyright

Licence dc:rights.uri

• http://rightsstatements.org/vocab/InC/1.0/

Language dc:language.iso

en

Dc Identifier Other

etd-05092009-040452

OAI identifier oai:identifier

oai:vtechworks.lib.vt.edu:10919/42543