, Volume 34, Issue 4, pp 435–446 | Cite as

Host specificity ofPterolonche inspersa [Lep.: Pterolonchidae] and its potential as a biological control agent forCentaurea diffusa, diffuse knapweed, andC. Maculosa, spotted knapweed

  • P. H. Dunn
  • S. S. Rosenthal
  • G. Campobasso
  • S. M. Tait


In 1981 the United States Department of Agriculture (USDA) Biological Control of Weeds Laboratory (BCWL, Rome, Italy) started investigating the host specificity ofP. inspersa as a candidate for biological control ofC. diffusa andC. maculosa, and in 1985 the investigation was completed at the USDA Biological Control of Weeds Laboratory at Albany, California. Thirty five species of plants in the familyAsteraceae and 23 other species in 8 related families were tested. Larval survival beyond 1st instar occurred only onCentaurea spp. except for 1 larva found inCnicus benedictus L.P. inspersa is stenophagous onCentaurea, therefore, a good candidate for introduction into North America.


Pterolonche inspersa Biological Control diffuse knapweed spotted knapweed Centaurea diffusa Centaurea maculosa North America 


Le laboratoire de Lutte Biologique contre les Mauvaises Herbes du Département Américain de l'Agriculture (U.S.D.A.) situé à Rome, Italie, a entrepris en 1981 une étude concernant la spécificité deP. inspersa comme agent possible de lutte biologique contreC. diffusa etC. maculosa. Cette étude fut terminée par la suite en 1985 en Californie par le laboratoire de Lutte Biologique contre les Mauvaises Herbes (U.S.D.A.) d'Albany. Trente-cinq espèces de plantes de la famille desAsteraceae et 23 espèces de 8 autres familles apparentées ont été testées. La survie larvaire au-delà du 1cr stade a eu lieu uniquement surCentaurea spp. à l'exception d'une larve qui fut trouvée surCnicus benedictus L.

Mots Clés

Pterolonche inspersa lutte biologique Centaurea diffusa Centaurea maculosa Amérique du Nord 


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  1. Davis, P. H. — 1975. Flora of Turkey Vol. 5 Compositae (P. Davis,ed.). —University Press, Edinburgh 890 pp.Google Scholar
  2. Dostal, J. — 1976. Vol. 4, 138.Centaurea in Flora Europaea (T. G. Tutin, V. H. Heywood, N. A. Burges, D. M. Moore, D. H. Valentine, S. M. Walters &D. A. Webb,eds.). —Cambridge Univ. Press, Cambridge.Google Scholar
  3. Goeden, R. D. — 1983. Critique and Revision of Harris' Scoring System for the Selection of Insect Agents in Biological Control of Weeds. —Prot. Entomol., 5, 287–301.Google Scholar
  4. Harris, P. — 1973. The Selection of Effective Agents for the Biological Control of Weeds. —Can. Entomol., 105, 1495–1503.Google Scholar
  5. Harris, P. — 1977. Establishment, increase and spread ofU. affinis andU. quadrifasciata in BC. —Proc. knapweed Symposium, Kanloops, BC. British Columbia Plant Science Lead Committee. (Meyers J., ed.). —Univ. of British Columbia, Vancouver BC. pp. 222–238.Google Scholar
  6. Harris, P. &Myers, J. H. — 1984.Centaurea diffusa Lam andC. maculosa Lam. s. lat., diffuse and spotted knapweed (Compositae) pp. 127–137. In: Biological Control Programmes against Insects and Weeds in Canada 1969–1980. (J. S. Kelleher &M. A. Hulme, eds). —Commonw. Agric. Bureaux., London. 410 pp.Google Scholar
  7. Heywood, V. H. — 1978. Flowering Plants of the World. (H. Heywood, ed.). —Mayflower Books, New York. 355 pp.Google Scholar
  8. Maddox, D. M. — 1979. The Knapweeds: Their Economics and Biological Control in the Western States. —U.S.A. Rangelands., 1, 139–141.Google Scholar
  9. McGuire, J. U., Lehman R. & Heath A. — 1967. Tables of Exact Probabilities for 2×2 Contingency Tests — U.S. Depart. Agric. Publ. ARS 20-15. —U.S. Gov. Printing Office — 1967. 0 271–612.Google Scholar
  10. Meyers, J. — 1977.Metzneria paucipunctella as a potential biological control agent of spotted knapweed in Westwald, British Columbia. — Proc. Knapweed Symposium, Kanloops, BC. British Columbia Plant Science Lead Committee (Meyers J., ed.). —Univ. of British Columbia., Vancouver pp. 132–134.Google Scholar
  11. Moore, R. J. — 1972. Distribution of Native and Introduced Knapweeds (Centaurea) in Canada and the United States. —Rhodora., 74, 331–346.Google Scholar
  12. Mueller, H. — 1984. Die Strukturanalyse der Wurzel-Phytophagenkomplexe vonCentaurea maculosa Lam undC. diffusa Lam (Compositae) in Europa und Interaktionen Zwischen wichtigen Phytophagenarten und ihren Wirtspflanzen. —Ph. D. Thesis Universität Bern., 163 pp.Google Scholar
  13. Schroeder, D. — 1977. Biotic Agents Attacking Diffuse Knapweed and Spotted Knapwed in Europe and their Prospective Suitability for Biological Control in North America — Proc. Knapweed Symp. Kamloops, B.C., Canada Oct. 6–7, 1977. —British Columbia Minist. of Agric., Victora, B.C. W8W-277.Google Scholar
  14. Watson, A. K. &Renny, A. J. — 1974. The Biology of Canadian WeedsCentaurea diffusa andCentaurea maculosa. —Can. Jour. Plant. Sci., 54, 687–701.Google Scholar

Copyright information

© Lavoisier Abonnements 1989

Authors and Affiliations

  • P. H. Dunn
    • 1
  • S. S. Rosenthal
    • 2
  • G. Campobasso
    • 1
  • S. M. Tait
    • 2
  1. 1.USDA ARS Biological Control of Weeds Laboratory Europe (Rome Italy) American Embassy, Agriculture APO NYUSA
  2. 2.USDA ARS Biological Control of Weeds LaboratoryAlbany CaliforniaAlbany

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