Races of the Barley Root-Knot Nematode, Meloidogyne naasi. II. Developmental Rates

R. E. Michell, R. B. Malek, D. P. Taylor, D. I. Edwards


The developmental rates of the five newly designated races ofMeloidogyne naasi were compared on barley, oat and sorghum. Races 1, 2, 3 and 4 developed and reproduced on both barley and oat but not on sorghum. Race 5 developed and reproduced readily on sorghum but poorly on oat. A more rapid rate of development of Race 5 on both barley and sorghum than that of other races on barley demonstrated that Race 5 has a shorter life cycle than do Races 1-4.

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