+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Release, dispersal, and recovery of a laboratory-selected strain of the walnut aphid parasite Trioxys pallidus (Hymenoptera: Aphidiidae) resistant to azinphosmethyl



Release, dispersal, and recovery of a laboratory-selected strain of the walnut aphid parasite Trioxys pallidus (Hymenoptera: Aphidiidae) resistant to azinphosmethyl



Journal of Economic Entomology 83(1): 89-96



A strain of Trioxys pallidus Haliday, selected in the laboratory for resistance to azinphosmethyl, was mass reared and released into five commercial walnut blocks in California to determine whether the strain could survive field applications of azinphosmethyl or methidathion, persist, and parasitize the walnut aphid, Chromaphis juglandicola Kaltenbach. Approximately 75,000 parasites were reared on potted walnut trees in a University of California greenhouse in Berkeley; releases were made after azinphosmethyl applications in three sites, after methidathion application in one site, and just before a methidathion application in one site. Colonies of T. pallidus collected from each orchard before the releases were tested with a discriminating dose of azinphosmethyl to estimate resistance levels of the wild population. Samples of T. pallidus were collected once or twice from each block after releases were made and from adjacent walnut blocks in two sites. The samples were then tested with azinphosmethyl. The high survival rates of the parasites indicated that the strain of T. pallidus resistant to azinphosmethyl established and persisted through the growing season in four of the five walnut blocks and dispersed to nearby nonrelease blocks in two of two sites sampled. Counts of aphids and mummies support the conclusion that the laboratory-selected strain survived applications of azinphosmethyl or methidathion, parasitized aphids, and persisted within the release and nearby nonrelease sites during the 1988 growing season.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 002207217

Download citation: RISBibTeXText

DOI: 10.1093/jee/83.1.89


Related references

Random amplified polymorphic DNA markers to monitor laboratory-selected, pesticide-resistant Trioxys pallidus (Hymenoptera: Aphidiidae) after release into three California walnut orchards. Environmental Entomology 24(3): 487-496, 1995

Toxicity of pesticides used on walnuts to a wild and azinphosmethyl-resistant strain of Trioxys pallidus (Hymenoptera: Aphidiidae). Journal of Economic Entomology 82(6): 1585-1592, 1989

Discriminating between biotypes of the walnut aphid parasite, Trioxys pallidus (Hymenoptera Aphidiidae), using random amplified polymorphic DNA (RAPD) markers. 1994

The field ecology of the walnut aphid, Chromaphis juglandicola (Homoptera: Aphididae) and its introduced parasite, Trioxys pallidus (Hymenoptera: Aphidiidae): a qualitative and quantitative assessment of population regulation. Dissertation Abstracts International B Sciences and Engineering, 414: 1234, 1980

Mode of inheritance of azinphosmethyl resistance in a laboratory selected strain of trioxys pallidus. Entomologia Experimentalis et Applicata 63(3): 229-236, 1992

Monitoring laboratory and field biotypes of the walnut aphid parasite, Trioxys pallidus, in population cages using RAPD-PCR. Biocontrol science and technology(3): 313-327, 1995

Guthion-resistant walnut aphid parasite. Release, dispersal, and recovery in orchards. California Agriculture 43(5): 21-23, 1989

Description of a new species of the genus Trioxys Haliday (Hymenoptera: Aphidiidae) and new record of Trioxys (Trioxys) pallidus (Hal.) from Kashmir (India). Journal of Entomological Research (New Delhi): 62: 146-149, 1982

Trioxys pallidus . . . an effective new walnut aphid parasite from Iran. Calif. Agric, 24: 11, 8-10, 1970

Biological control of the walnut aphid in California: impact of the parasite, Trioxys pallidus. Hilgardia 471: 1-13, 1979

Biological control of the walnut aphid in california usa impact of the parasite trioxys pallidus. Hilgardia 47(1): 1-14, 1979

Introduction and establishment of trioxys pallidus hymenoptera aphidiidae in oregon usa for control of filbert aphid myzocallis coryli homoptera aphididae. Entomophaga 34(2): 153-164, 1989

Initial field observations in California on Trioxys pallidus (Haliday) a recently introduced parasite of the Walnut aphid. J. econ. Ent, 55: 6, 857-62, 1962

Trioxys acericola new species hymenoptera aphidiidae a parasite of the aphid drepanosiphoniella from france. Annales de la Societe Entomologique de France 7(4): 885-887, 1971

Toxicity of Benzoylphenyl Ureas and Thuringiensin to Trioxys pallidus (Hymenoptera: Braconidae) and the Walnut Aphid (Homoptera: Aphididae). Journal of Economic Entomology 78(5): 1133-1137, 1985