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Effect of Herbicide Treatment on Leafy Spurge Gall Midge (Spurgia esulae) Population

Published online by Cambridge University Press:  12 June 2017

Rodney G. Lym  and
Robert B. Carlson
Rodney G. Lym
Affiliation:
Crop, North Dakota State Univ., Fargo, ND 58105
Robert B. Carlson
Affiliation:
Weed Sci. Dep. and Entomology Dep., North Dakota State Univ., Fargo, ND 58105
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Abstract

The Spurgia esulae gall midge was introduced in North Dakota in 1986 as a biocontrol agent for leafy spurge. Spurgia esulae causes stem tip galls thereby decreasing seed production and it has been most successful near wooded areas. However, a second control method is needed to reduce the leafy spurge infestation and prevent spread from roots. Imazethapyr, 2,4-D, or picloram application did reduce the number of S. esulae galls but not the number of larvae per gall. Long-term S. esulae population was not affected by herbicide application. The integration of herbicides with S. esulae would prevent leaf spurge spread from a wooded area and would reduce seed production within an area where herbicides generally cannot be used.

Keywords

Imazethapyr, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acidpicloram, 4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid2,4-D, (2,4-dichlorophenoxy)acetic acidleafy spurge gall midge, Spurgia esulae Gagnéleafy spurge, Euphorbia esula L. # EPHESBiological controlintegrated managementweed biocontrolimazethapyrpicloram2,4-DEPHES
Type
Research
Information
Weed Technology , Volume 8 , Issue 2 , June 1994 , pp. 285 - 288
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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