Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-24T10:29:03.387Z Has data issue: false hasContentIssue false
  • English
  • Français

DISTRIBUTION OF METASEIULUS OCCIDENTALIS (NESBITT) AND TYPHLODROMUS PYRI SCHEUTEN (PARASITIFORMES: PHYTOSEIIDAE) IN APPLE ORCHARDS OF THE HOOD RIVER VALLEY, OREGON

Published online by Cambridge University Press:  31 May 2012

B.A. Croft ,
P. Shearer ,
G.J. Fields  and
H.W. Riedl
B.A. Croft
Affiliation:
Department of Entomology, Oregon State University, Corvallis, Oregon, USA 97331
P. Shearer
Affiliation:
Department of Entomology, Oregon State University, Corvallis, Oregon, USA 97331
G.J. Fields
Affiliation:
Department of Entomology, Oregon State University, Corvallis, Oregon, USA 97331
H.W. Riedl
Affiliation:
Department of Entomology, Oregon State University, Corvallis, Oregon, USA 97331
Get access Rights & Permissions [Opens in a new window]

Abstract

In a survey of predaceous phytoseiid mites from 65 apple blocks in the Hood River Valley, Oregon, Metaseiulus occidentalis (Nesbitt) and Typhlodromus pyri Scheuten were the principal species present. Metaseiulus occidentalis predominated over T. pyri by a ratio of about 2:1 in 1984 mites collected during 1985. In experimental, commercial, and integrated pest management blocks, M. occidentalis was present alone or predominated over T. pyri in up to 88% of the blocks, whereas T. pyri occurred alone or predominated in up to 20% of the blocks. Both species occurred in near equal proportions in a maximum of 20% of blocks. An analysis of nine factors influencing the relative abundance of M. occidentalis and T. pyri indicated that vegetation in the habitat surrounding the block and the pesticides used were most important. In 1986, seasonal distributions and proportions of predatory mites found in individual blocks were similar to those found in 1985. The feasibility of managing mixed populations of T. pyri and M. occidentalis in Hood River orchards is discussed.

Résumé

Lors d’un inventaire des acariens prédateurs phytoséiides dans 65 parcelles de pommier dans la Vallée de la Rivière Hood en Oregon, Metaseiulus occidentalis (Nesbitt) et Typhlodromus pyri Scheuten se sont avérées les principales recensées. Metaseiulus occidentalis prédominait sur T. pyri dans un rapport de 2 : 1 dans les populations de 1984 collectées en 1985. Dans des parcelles expérimentales, commerciales et régies par un programme de lutte intégrée, M. occidentalis était seul présente ou prédominait sur T. pyri dans 88% tout au plus des parcelles, alors que T. pyri était seule ou prédominait dans 20% au plus des parcelles. L’analyse de neuf facteurs influençant l’abondance relative de M. occidentalis et T. pyri a indiqué que la végétation entourant la parcelle et les pesticides utilisés étaient les plus importants. En 1986, la distribution saisonnière et la proportion des espèces dans les parcelles étaient similaires à celles de 1985. On commente la possibilité de gestion de populations mixtes de T. pyri et M. occidentalis dans les vergers de la Rivière Hood.

Type
Articles
Information
The Canadian Entomologist , Volume 122 , Issue 1 , February 1990 , pp. 5 - 14
Copyright
Copyright © Entomological Society of Canada 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Anderson, N.H., Morgan, C.V.G., and Chant, D.A.. 1958. Notes on the occurrence of Typhlodromus and Phytoseius spp. in southern British Columbia (Acarina: Phytoseiidae). Can. Ent. 90: 275–279.CrossRefGoogle Scholar
Croft, B.A. 1976. Establishing insecticide-resistant phytoseiid mite predators in deciduous tree fruit orchards. Entomophaga 21: 383–399.CrossRefGoogle Scholar
Croft, B.A., and AliNiazee, M.T.. 1983. Differential tolerance or resistance to insecticides in Typhlodromus arboreus Chant and associated phytoseiid mites from apple in the Willamette Valley, Oregon. J. econ. Ent. 12: 1420–1423.Google Scholar
Croft, B.A., and Hoyt, S.C.. 1983. Integrated Management of Insect Pests of Pome and Stone Fruits. Wiley Interscience, New York. 456 pp.Google Scholar
Croft, B.A., and Strickler, K.. 1983. Natural enemy resistance to pesticides: Documentation, characterization, theory and application. pp. 669–702 in Georghiou, G.P., and Saito, T. (Eds.), Pest Resistance to Pesticides. Plenum Press, New York. 809 pp.Google Scholar
Dunley, J. 1989. Comparative migration of Metaseiulus occidentalis and Typhlodromus pyri in apple orchards of the Hood River Valley, Oregon. M.S. thesis, Oregon State University, Corvallis. 89 pp.Google Scholar
Engleman, L. 1985. Stepwise logistic regression. Sec 14.5. pp. 330–344 in Dixon, W.J. (Ed.), BMDP Statistical Software. University of California Press, Berkeley. 456 pp.Google Scholar
Hadam, J.J., AliNiazee, M.T., and Croft, B.A.. 1986. Phytoseiid mites (Parasitiformes: Phytoseiidae) of major crops in the Willamette Valley, Oregon and pesticide resistance in Typhlodromus pyri Scheuten. Environ. Ent. 15: 1255–1262.CrossRefGoogle Scholar
Helle, W., and Sabelis, M.W., 1986. Spider Mites: Their Biology, Natural Enemies and Control. Vol. 1B. Elsevier, Amsterdam. 458 pp.Google Scholar
Hoyt, S.C. 1969. Integrated chemical control of insects and biological control of mites on apple in Washington. J. econ. Ent. 62: 74–86.CrossRefGoogle Scholar
Sabelis, M.W. 1986. Long range dispersal and searching behavior. Cpt. 2.1.3.3 pp. 131–140 in Helle, W., and Sabelis, M.W. (Eds.), Spider Mites: Their Biology, Natural Enemies and Control. Vol. 1B. Elsevier, Amsterdam. 458 pp.Google Scholar
Solomon, M.G., and Fitzgerald, J.D.. 1984. The role of resistant Typhlodromus pyri in apple orchards. Proc. Brit. Crop Prot. Conf. 3: 1107–1111.Google Scholar
Theiling, K., and Croft, B.A.. 1988. Pesticide effects on arthropod natural enemies: a database summary. Agric. Ecosys. Environ. 21: 191–218.CrossRefGoogle Scholar
Zwick, R.W. 1972. Studies on the integrated control of spider mites on apple in Oregon's Hood River Valley. Environ. Ent. 1: 169–176.CrossRefGoogle Scholar
Zwick, R.W., and Fields, G.J.. 1979. Field and laboratory evaluations of fenvalerate against several insect and mite pests of apple and pear in Oregon. J. econ. Ent. 71: 793–796.CrossRefGoogle Scholar