紫素叶在日本是用于腌渍咸菜的一种食叶性植物。我市开发区富士蔬菜制品有限公司1990年从日本引进种子并在烟台中日富茂农场种植5亩。产品加工后全部出口日本。今年我们在产地检疫观察中发现危险性杂草菟丝子 Cuscuta chinensis Lamb。田间共发生3处,面积约10m~2,其中最大一处为5m~2,受害植株较正常植株矮1/2,且叶片小而黄, Purple leaf in Japan is used to pickle pickles of a leafy plant. Fuji Vegetable Products Co., Ltd. of our city development zone introduced seeds from Japan in 1990 and planted 5 mu in Sino-Japanese Fumao Farm in Yantai. All products exported to Japan after processing. This year we found in the quarantine inspection of the origin of dangerous weed Cuscuta chinensis Lamb. A total of 3 fields, an area of ​​about 10m ~ 2, of which a maximum of 5m ~ 2, the victim plants shorter than normal plants 1/2, and small and yellow leaves,