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Annual Bluegrass (Poa annua) Control with Xanthomonas campestris pv. poannua in New York State

Published online by Cambridge University Press:  12 June 2017

T. Zhou  and
J. C. Neal
T. Zhou
Affiliation:
Dep. of Floriculture and Ornamental Hortic, 20 Plant Science Bldg., Cornell University, Ithaca, NY 14850
J. C. Neal
Affiliation:
Dep. of Floriculture and Ornamental Hortic, 20 Plant Science Bldg., Cornell University, Ithaca, NY 14850
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Abstract

California and Michigan strains of Xanthomonas campestris pv. poannua were compared as biocontrol agents for the annual and perennial subspecies of annual bluegrass. Additionally, inoculation frequency was evaluated for improved control of the perennial subspecies in New York. The two bacterial strains were similarly virulent to annual bluegrass in both growth chamber and field tests. When inoculated once per week for 4 wk, the annual and perennial subspecies were controlled 92 and 82% in growth chamber tests, but only 11 and 7% in field tests, respectively. Control of established annual bluegrass in the field was improved to a maximum of about 40% by increasing inoculation frequency to three times per wk for 4 wk, but recovery occurred 2 to 5 wk after inoculations were discontinued. Creeping bentgrass was not affected by the bacterium.

Keywords

Annual bluegrass, Poa annua L. # POAAN-annual subspecies, P. annua ssp. annua and perennial subspecies, P. annua ssp. reptansCreeping bentgrass, Agrostis stolonifera L. # AGSST (more commonly Agrostis palustris Huds.)Bacteriumbiocontrolbiological weed controlapplication frequencyPOAAN
Type
Research
Information
Weed Technology , Volume 9 , Issue 1 , March 1995 , pp. 173 - 177
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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