This article describes Caltrans' successful introduction of weed-eating insects to combat undesirable roadside growth. Roadsides in California have a diverse collection of planted and native vegetation making the application of integrated pest control or natural control methods simpler to apply than in agricultural crops. This diversity has made the application of biological control a practical and successful method of reducing the use of toxic pesticides, as well as a savings in tax dollars. The objectives of Caltrans' research are to reduce the use of hazardous chemicals, lower the costs of landscape and roadside maintenance and reduce the need of chemicals. Caltrans goal is not complete elimination of all insect or weed pests, but a reduction in levels of infestations. It is noted that the use of insecticides not only frequently requires retreatment, but also exposes maintenance workers and public to potentially hazardous materials. A further complication is that the pests may develop resistance to the chemical insecticide. A successful research project was the use of insect predators of Albizzia psyllid, a pest on the Acacia trees planted along highways. Since the release of the predators, no chemical spraying has been needed and adequate pest control has been achieved.

  • Corporate Authors:

    Scranton Publishing Company

    434 South Wabash Avenue
    Chicago, IL  United States  60605
  • Authors:
    • Cassidy, D V
  • Publication Date: 1978-2

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00173904
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 31 1978 12:00AM