珠兰[Chboranthu spicatus(Tub)Mak)是一种经济价值很高的香料作物,并可与茶制成珠兰花荣,花与茎可提取芳香油,但叶线虫病长期以来为害珠兰,成为珠兰上的一种重要病害.据调查该线虫主要为害叶部,初期病斑黄色,背面在雨后呈水渍状,后变红褐色或桔红色、病斑逐渐扩大,最后呈兰褐色、病叶易早脱落,花小而少,重者全盆大部叶片掉 Chboranthu spicatus (Tub) Mak) is an economically valuable spice crop that can be made into pearl orchid with tea, flowers and stems to extract aromatic oils, but nematode has long been a harmful pearl orchid, becoming According to the investigation of the main insect nematode affected leaves, the initial lesion yellow, back in the rain was water-like, after turning reddish brown or orange, the lesion gradually expanded, and finally blue-brown, Sick leaves easy to fall off early, small and small flowers, heavy basin most of the leaves out