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OBSERVATIONS ON THE ATTACK BY DITYLENCHUS DIPSACI ON VARIETIES OF OATS BY J. B. GOODEY & D. J. HOOPER Rothamsted Experimental Station, Harpenden, Herts, England Biotypes of the oat race of D. dipsaci may occur in Britain. Resistant Milford oat seedlings were invaded but no typical tulip-root symptoms developed although some seedlings were killed. Resistance develops with age of the host. About 12% of 145 oats tested were resistant and another 8% partially so. The factors for resistance can possibly be traced back to Avena byzantina. In collaboration with the National Institute of Agricultural Botany we have continued the work started by T. Goodey (1937, 1950) to test oat varieties for their susceptibility to attack by Ditylenchu.r difiJaci (Kühn). Until 1953, the variety Milford had been found to be resistant, but then some plants sent from Starcross, Devon were found to be infested and showing typical tulip-root. This suggested the occurrence of a biotype able to infest plants with the resistance derived from Grey Winter, a parent of Milford, and we therefore obtained D. ,dipsaci from several different parts of Britain to compare their abilities to infest a range of susceptible and resistant varieties. We have also compared
Nematologica – Brill
Published: Jan 1, 1962
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