Prevention and control of ginseng blight

Ginseng blight is an important disease of ginseng, which can not only damage plant stems and leaves, but also infect ginseng roots and cause wet rot of ginseng roots. In the far east of Russia, 20% of ginseng can be lost by 30% due to the occurrence of epidemic disease. The disease is widely distributed in China, Korea, Japan, Russia and other countries. The prevention and control measures are as follows.

① applies a single light transmission shed. The ginseng bed is covered with fallen leaves, straw, wheat straw, Penny grass and other mulch to prevent the ginseng bed from leaking rain and rain, which can control the epidemic of ginseng blight.

② strengthens the management of the participation bed. Make the ginseng bed ventilated and well drained, so as to enhance the disease resistance of ginseng. Once diseased plants are found, they should be pulled out in time, disinfect the diseased leaves or roots, and disinfect the diseased roots with quicklime to prevent infection from spreading.

③ chemical control. In the early stage of stem and leaf disease, spraying 500-800 times liquid such as Ruidusu, ethyl aluminum, metalaxyl manganese zinc and so on has protective and therapeutic effect, and the control effect is remarkable. Chemical treatment of soil and ginseng seedlings is an effective measure to control ginseng root blight. The effective fungicides of soil treatment were Reduscus, Metalaxyl Manganese Zinc, Aluminium Ethyl Phosphate and Mancozeb 500 times each, all of which had better control effect, among which Ruidu and Metalaxyl Manganese Zinc had the best control effect.