Cuarezma-Terán J A, Trevathan L E
J Nematol. 1985 Apr;17(2):169-74.
Host-parasite relationships of Pratylenchus zeae and Quinisulcius acutus, alone or in combination, were studied on sorghum in the greenhouse and laboratory. Q. acutus at 1,000 or 5,000 nematodes per 15-cm-d pot and P. zeae at 500 nematodes per pot significantly suppressed plant height and fresh and oven dry shoot and root weights. A mixture of 1,000 Q. acutus and 500 P. zeae per pot resulted in greatest suppression of growth. Roots of plants inoculated with Q. acutus alone were reduced in number and size and showed lesions and discoloration. Reproduction of this nematode 42 days after inoculation was much greater in treatments of 100 or 1,000 than 5,000 nematodes. The population density of the two species at 6 weeks after inoculation was significantly less when combined than for each species alone. When the two species were combined, reproduction of P. zeae was greater than that of Q. acutus, but the final populations per gram of root weight were the same. Q. acutus fed ectoparasitically on epidermal cells of sorghum roots in the zone of elongation and differentiation when observed under in vitro conditions.
在温室和实验室条件下，研究了玉米短体线虫（Pratylenchus zeae）和尖锐双宫螺旋线虫（Quinisulcius acutus）单独或混合接种在高粱上的寄主 - 寄生虫关系。每15厘米口径花盆接种1000条或5000条尖锐双宫螺旋线虫，以及每盆接种500条玉米短体线虫，均显著抑制了植株高度、地上部和根部的鲜重及干重。每盆接种1000条尖锐双宫螺旋线虫和500条玉米短体线虫的混合物对生长的抑制作用最大。单独接种尖锐双宫螺旋线虫的植株根系数量减少、体积变小，并出现病斑和变色。接种42天后，接种100条或1000条线虫处理中的该线虫繁殖量远高于接种5000条线虫的处理。接种6周后，两种线虫混合接种时的种群密度显著低于单独接种每种线虫时的密度。当两种线虫混合接种时，玉米短体线虫的繁殖量大于尖锐双宫螺旋线虫，但每克根重中的最终种群数量相同。在体外观察时，尖锐双宫螺旋线虫以高粱根伸长和分化区的表皮细胞为外寄生取食对象。
