Kotcon J B
J Nematol. 1990 Oct;22(4S):712-7.
Nematode population densities were determined in soil and root samples collected from 205 peach (Prunus persica L.) orchard blocks between 25 March and 5 May 1986. Representative specimens from 75 blocks were identified to species; 28 species of plant-parasitic nematodes were identified. Predaceous nematodes (Mononchidae) were observed in 71% of the samples. The most common plant-parasitic genera were Paratylenchus, Helicotylenchus, Pratylenchus, and Xiphinema, occurring in 85, 84, 77, and 74% of the samples, respectively. Population densities of Xiphinema, Pratylenchus, Meloidogyne, Hoplolaimus, and Criconemella were at potentially damaging levels in 74, 19, 13, 10, and 2% of the samples, respectively. Potentially damaging nematode densities were observed in 78% of orchard blocks surveyed, with 35% having two or more nematodes with densities high enough to warrant concern. Nematode densities differed among soil types and tree rootstocks and were correlated with tree mortality rates.
1986年3月25日至5月5日期间，对从205个桃园地块采集的土壤和根系样本中的线虫种群密度进行了测定。从75个地块中选取代表性样本进行种类鉴定，共鉴定出28种植物寄生线虫。在71%的样本中观察到了捕食性线虫（单齿线虫科）。最常见的植物寄生线虫属是拟盘旋线虫属、螺旋线虫属、短体线虫属和剑线虫属，分别出现在85%、84%、77%和74%的样本中。剑线虫属、短体线虫属、根结线虫属、盘旋线虫属和环线虫属的种群密度在74%、19%、13%、10%和2%的样本中达到了潜在危害水平。在所调查的果园地块中，78%观察到了潜在有害的线虫密度，其中35%的地块有两种或更多种线虫，其密度高到足以引起关注。线虫密度因土壤类型和树根砧木而异，并且与树木死亡率相关。
