Advertisement

Enhancement of Purple Blotch Disease of Onion by Thrips Injury

  • Bob Cartwright
  • C. L. McKenzie
  • M. E. Miller
  • P. Perkins-Veazie
  • J. V. Edelson
Part of the NATO ASI Series book series (NSSA, volume 276)

Abstract

The role of Thrips tabaci injury to onion in the invasion of Alternaria porri (Ellis) and rate of purple blotch disease development was determined. In the absence of thrips injury, older leaves were more susceptible to infection by A. porri. Plant growth was negatively correlated to thrips injury. Thrips-infested plants developed more and larger A. porri lesions that coalesced as plants matured. The intra-plant distribution of purple blotch infection shifted to younger leaves as a result of thrips damage and more tissue was killed by thrips in the presence of purple blotch.

Keywords

Leaf Area Young Leave Leaf Length Total Leaf Area Estimate Leaf Area 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References Cited

  1. Bhangale, G. T. & M. B. Joi. 1983. Role of thrips in development of purple blotch of onion. J. Maharashtra Agric. Univ. 8(3): 299–300.Google Scholar
  2. Chisholm, I. F. & T. Lewis. 1984. A new look at thrips (Thysanoptera) mouthparts, their action and effects of feeding on plant tissue. Bull. Entomol. Res. 74: 663–675.CrossRefGoogle Scholar
  3. Edelson, J.V., B. Cartwright & T. Royer. 1986. Distribution and impact of Thrips tabaci (Thysanoptera: Thripidae) on onion. J. Econ. Entomol. 79: 502–505.Google Scholar
  4. Edelson, J.V., B. Cartwright & T. Royer. 1989. Economics of controlling onion thrips (Thysanoptera: Thripidae) on onions with insecticides in south Texas. J. Econ. Entomol. 82(2): 561–564.Google Scholar
  5. Ellis, M. B. 1971. Dematiaceous Hyphomycetes. Commonwealth Mycological Institute, Kew, Surrey.Google Scholar
  6. Gamiely, S., W. M. Randle, H. A. Mills & D. A. Smittle. 1991. A rapid and nondestructive method for estimating leaf area in onions. Hortscience 26(2): 206.Google Scholar
  7. McKenzie, C. L., B. Cartwright, M. E. Miller & J. V. Edelson. 1993. Injury to onions by Thrips tabaci Lindeman (Thysanoptera: Thripidae) and its role in the development of purple blotch. Environ. Entomol. 22(6): 1266–1277.Google Scholar
  8. Miller, M. E. 1983. Relationship between onion leaf age and susceptibility to Alternaria porri. Plant Dis. 67(3): 284–286.CrossRefGoogle Scholar
  9. Nolla, J.A.B. 1927. A new Alternaria disease of onions (Allium cepa L.). Phytopathology 7: 115–132.Google Scholar
  10. Pandotra, V. R. 1964. Purple blotch disease of onion in Punjab. I. Its occurrence, pathogenicity and host range. Proc. Indian Acad. Sci. Sect. B 60: 336–340.Google Scholar
  11. SAS Institute. 1988. SAS user’s guide: statistics, version 6.03 éd. SAS Institute, Cary, NC.Google Scholar

Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Bob Cartwright
    • 1
  • C. L. McKenzie
    • 2
  • M. E. Miller
    • 3
  • P. Perkins-Veazie
    • 4
  • J. V. Edelson
    • 1
  1. 1.Department of Entomology, Wes Watkins Agricultural Research & Extension CenterOklahoma State UniversityLaneUSA
  2. 2.FMC CorporationYumaUSA
  3. 3.Texas A&M UniversityWeslacoUSA
  4. 4.South Central Agricultural Research LaboratoryUSDA, Agricultural Research ServiceLaneUSA

Personalised recommendations