THE USE OF WEED FEEDING INSECTS FOR THE NON-CHEMICAL MANAGEMENT OF PUNCTUREVINE ALONG CALIFORNIA HIGHWAYS

A brief history of puncturevine's introduction, taxonomic position, origin, spread and economic importance in California is given. The foreign exploration, testing, and introduction of the seed and stem weevils (Microlarinus spp.) of puncturevine in California are reviewed. A total of 4,831 weevils were collected and transferred to problem areas along California highways. Plant damage studies were carried out in which it was shown that weevil feeding caused significant differences in seed pod production, stem length, and plant dry weight in a closed system experiment. In an open system experiment, significant seed pod destruction occurred although the plants had received excessive water. Preliminary studies showed that weevils respond to water and methanol-soluble extracts of puncturevine.

  • Supplemental Notes:
    • Report on Biological Control of Russian Thistle and Puncturevine along California Highways. The report number for Phase A is FHWA-CA-HM-USDA-4108-78-01.
  • Corporate Authors:

    Agricultural Research Service

    Biological Control of Weeds Lab
    Albany, CA  USA 

    Federal Highway Administration

    Office of Highway Maintenance, 1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Maddox, D M
  • Publication Date: 1977-7

Media Info

  • Pagination: 23 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00180827
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: Final Rpt.
  • Files: NTIS, TRIS, USDOT
  • Created Date: Sep 14 1978 12:00AM