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Biological Control of Thistles

John,

My husband's brother-in-law is a range scientist and weed expert who works for Dow AgroSciences. He did research into biological controls for leafy spurge. I forwarded your inquiry to him since I thought he probably had contacts in other areas of bio weed control and this is his response. I hope you find it helpful.

Suzanne Tuttle


-----Original Message-----
From: Masters, Robert (RA) [R*@dow.com]
Sent: Saturday, June 21, 2003 1:38 PM
To: Tuttle, Suzanne
Subject: RE: biological control of thistle

Suzanne:
I doubt that a defoliating insect will have much impact on exotic biennial thistles. Insects that reduce seed production potential, such as Rhinocyllus conicus (seedhead weevil) or Trichsirocalus horridus (rosette weevil) will likely have more impact. Unfortunately, Svata Louda has found R. conicus utilizing off-target native thistles.

Svata Louda is the expert on thistle biocontrol agents and would be good contact for information about Cassida. Her contact information is:
420 Manter Hall
University of Nebraska
School of Biological Sciences
Lincoln, NE 68588-0118
slouda@unlserve.unl.edu
http://www.biosci.unl.edu/faculty/louda.asp


Bob
Robert A. Masters, Ph.D.
Field Research Biologist
Dow AgroSciences LLC
3618 South 75th Street
Lincoln, Nebraska 68506
Phone: (402)488-1157
Mobile: (402)304-2323
FAX: (402)488-1338
E-mail: ramasters@dow.com

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