Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 9:744-746 (1969)
© 1969 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Reaction of Kentucky Bluegrass Strains to Feeding by the Sod Webwor1

R. C. Buckner2, B. C. Pass3, P. B. Burrus, II2 and J. R. Todd3

A Kentucky-grown common lot of Kentucky bluegrass (Poa pratensis L.) was more resistant to sod webworm (Crambus spp.) injury than cultivar and common lots frcm Demnark and Holland. Certain selected strains had either consistently greater resistance or greater susceptibility to injury than Kentucky-grown common, indicating that sources of resistance exist that may be used in developing cultivars with resistance to sod webworm injury.

Feeding trials, total sugar, and silica content of the foliage failed to reveal the nature of resistance to sod webworm. Resistant strains had heavier weights of rhizomes during May than suspectible strains. This indicated the possibility of a relationship between stored food reserves prior to the stress period and resistance to sod webworm injury during the summer.

Key Words: Nature of resistance

1 Cooperative investigations at Lexington, Kentucky, of the Crops Research Division, Agricultural Research Service, United States Department of Agriculture, and the Department of Agronomy, University of Kentucky Agricultural Experiment Station. The investigation reported, in connection with a project of the Kentucky Agricultural Experiment Statiort, is published with the approval of the Director as paper number 69-3,7-35.

2 Research Agronomist and Research Assistant, Crops Research Division, Agricultural Research Service. U.S. Department of Agriculture, Lexington Ky.

3 Associate Professor of Entomology and Research Specialist in Agronomy, Kentucky Agricultural Experiment Station, Lexington, Ky. 40506.

Received for publication April 25, 1969.




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