5个香蕉穿孔线虫种群对香蕉的致病性测定

香蕉是五大热带水果之一，也是备受人们喜爱的一种水果，而香蕉穿孔线虫对香蕉的危害是一种毁灭性的危害。为了明确5个香蕉穿孔线虫种群对香蕉的致病性，通过在温室中采用盆栽接种的方法，分别测定了5个香蕉穿孔线虫花卉种群对巴西蕉、皇帝蕉和粉蕉的寄生性。结果表明，5个香蕉穿孔线虫种群对巴西蕉都有强致病性；Rs1种群对粉蕉存在弱致病性，其它4个种群对粉蕉均没有致病性；皇帝蕉不是这5个香蕉穿孔线虫种群的寄主植物。香蕉穿孔线虫寄生巴西蕉后，造成香蕉植株明显矮小、长势弱，严重时地上部叶片出现萎蔫黄化，根部形成褐色病斑甚至坏死变黑腐烂等症状，对巴西蕉危害显著。

Determination of Pathogenicity of 5 Populations of Radopholus similis to 3 Banana Cultivars

Banana is one of the five major tropica fruits and peaple like it, but Radopholus similis is the most serious pests of the banana. The pathogenicity of 5 populations of R. similis were tested to seedling of 3 banana caltivars. Pot inoculation was used in greenhouse tests. The results show that, 5 populations of R. similis tested obviously infected the roots of Musa AAA Giant Cavendish cv. Baxi. RS1population of R. similis was weakly infected the roots of MusaABB Pisang Awak and the other four populations were not. Musa acuminata cv. Mas was not the host of this 5 R. similis populations. It was caused Musa AAA Giant Cavendish cv. Baxi plants growing weak and root necrosis.