Lindgren, Cory John and Gabor, T. Shane and Murkin, Henry R. (1999) Compatibility of Glyphosate with Galerucella calmariensis; a Biological Control Agent for Purple Loosestrife (Lythrum salicaria). Journal of Aquatic Plant Management, 37, pp. 44-48.
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By integrating Galerucella calmariensis with glyphosate there is potential to achieve both immediate and sustained control of purple loosestrife (Lythrum salicaria). The objective of this study was to determine the compatibility of glyphosate on the oviposition and survival of adult G. Calmariensis and on the ability of G. calmariensis third instar larvae to pupate to teneral adults. Our results revealed glyphosate (formulated as Roundup) at a concentration of 2% (2.43L/acre) and 4% solution (4.86 L/acre) had no impact on the ability of G. calmariensis third instar larvae to pupate to new generation adults. To examine the effect of a 2% solution of glyphosate on adult G. calmariensis oviposition and survival, adults were randomly divided between a direct contact group (adults sprayed directly), an indirect contact group (host plants with adults were sprayed), and a control group. Our results revealed that glyphosate does not impact G. calmariensis oviposition or adult survival. The results of this study indicate that G. calmariensis is compatible with glyphosate indicating that further field studies examining integrated control strategies for purple loosestrife are warranted.
|Title:||Compatibility of Glyphosate with Galerucella calmariensis; a Biological Control Agent for Purple Loosestrife (Lythrum salicaria)|
|Journal or Publication Title:||Journal of Aquatic Plant Management|
|Page Range:||pp. 44-48|
|Issuing Agency:||Aquatic Plant Management Society, Inc.|
|Uncontrolled Keywords:||Roundup herbicide; integrated vegetation management; non-indigenous weed species; leaf-eating beetle; purple loosestrife; Lythrum salicaria; Galerucella calmariensis; glyphosate|
|Depositing User:||Natalie Wiest|
|Date Deposited:||24 Nov 2008 22:23|
|Last Modified:||29 Sep 2011 22:04|
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