Acosta N, Ayala A
J Nematol. 1976 Oct;8(4):315-7.
When Guinea yam, Dioscorea rotundata Poir, was inoculated with Pratylenchus coffeae and Scutellonema bradys together, there was a 53% suppression of top growth, but when plants were inoculated separately there was a 29% suppression with P. coffeae and a 21% suppression with S. bradys. The reproduction of S. bradys was greatly inhibited when both nematode species were together on the same plant in comparison with that on plants inoculated with S. bradys alone. Scutellonema bradys apparently did not affect the reproduction of P. coffeae. Storage-root quality was reduced 72% by P. coffeae but only 20% by S. bradys. The two species together resulted in a reduction in storage-root quality of 84%. Although the Guinea yam is a good host of P. coffeae and S. bradys, our results indicate that P. coffeae is responsible for most of the storage-root deterioration and dry rot of yam in Puerto Rico.
当用咖啡短体线虫和缓长毛盘孢线虫同时接种几内亚薯蓣（Dioscorea rotundata Poir）时，地上部生长受到53%的抑制，但当分别接种这两种线虫时，咖啡短体线虫使地上部生长受到29%的抑制，缓长毛盘孢线虫使地上部生长受到21%的抑制。与单独接种缓长毛盘孢线虫的植株相比，当两种线虫同时存在于同一植株上时，缓长毛盘孢线虫的繁殖受到极大抑制。缓长毛盘孢线虫显然不影响咖啡短体线虫的繁殖。咖啡短体线虫使贮藏根品质降低72%，而缓长毛盘孢线虫仅使其降低20%。两种线虫共同作用使贮藏根品质降低84%。虽然几内亚薯蓣是咖啡短体线虫和缓长毛盘孢线虫的良好寄主，但我们的结果表明，在波多黎各，咖啡短体线虫是导致山药贮藏根变质和干腐的主要原因。
