Jordaan E M, De Waele D
J Nematol. 1988 Oct;20(4):620-4.
The host suitability of five of the most common weed species occurring in maize (Zea mays L.) fields in South Africa to Pratylenchus zeae was tested. Based on the number of nematodes per root unit, mealie crotalaria (Crotalaria sphaerocarpa) was a good host; goose grass (Eleusine indica), common pigweed (Amaranthus hybridus), and thorn apple (Datura stramonium) were moderate hosts; and khaki weed (Tagetes minuta) was a poor host. Only the root residues of khaki weed suppressed the P. zeae infestation of subsequently grown maize. When goose grass, khaki weed, and mealie crotalaria were grown in association with maize in soil infested with P. zeae, goose grass and khaki weed severely suppressed maize root development; this resulted in a low number of nematodes per maize root system and a high number of nematodes per maize root unit. Mealie crotalaria did not restrict maize root growth and did not affect nematode densities per maize root system or maize root unit. Special attention should be given to the control of mealie crotalaria, which is a good host for P. zeae, and goose grass, which, in addition to its ability to compete with maize, is also a suitable host for P. zeae.
对南非玉米（Zea mays L.）田地里出现的5种最常见杂草品种对玉米短体线虫（Pratylenchus zeae）的寄主适宜性进行了测试。基于每根单位线虫数量，玉米猪屎豆（Crotalaria sphaerocarpa）是良好寄主；牛筋草（Eleusine indica）、反枝苋（Amaranthus hybridus）和曼陀罗（Datura stramonium）是中等寄主；而非洲万寿菊（Tagetes minuta）是不良寄主。只有非洲万寿菊的根残体抑制了随后种植玉米的玉米短体线虫侵染。当牛筋草、非洲万寿菊和玉米猪屎豆与感染玉米短体线虫的土壤中的玉米一起种植时，牛筋草和非洲万寿菊严重抑制了玉米根系发育；这导致每个玉米根系线虫数量少，而每个玉米根单位线虫数量多。玉米猪屎豆不限制玉米根系生长，也不影响每个玉米根系或玉米根单位的线虫密度。应特别注意防治玉米猪屎豆，它是玉米短体线虫的良好寄主，以及牛筋草，它除了能够与玉米竞争外，也是玉米短体线虫的适宜寄主。
