The latest common diseases and insect pests of Panax quinquefolium and their control methods

American ginseng is one of the most precious medicinal materials, and the higher the year, the more expensive the price, the higher the medicinal value, but at present, the year of American ginseng on the market is generally not very high, due to the lack of wild resources. the amount of payment planted at home is not very high, but the market demand is relatively large, so the market is in short supply, so in order to increase production, it is necessary to prevent some diseases that will appear in the growth pot. Only in this way can American ginseng be produced with high quality and high yield. The following is the prevention and control methods of some diseases and insect pests of American ginseng brought by the pro-agricultural network, hoping to help you.

1. Black spot

The black spot of American ginseng is generally manifested in the leaves and stems, and sometimes on the fruits of American ginseng. At the initial stage of the disease, there are some scattered oval black-brown spots on the leaves or stems. If there is no control, its color will slowly deepen and continue to spread, and finally appear on the fruit of American ginseng, and then infiltrate into the fruit. At that time, such American ginseng will be of no value at all. Generally speaking, Rain Water has many causes of this kind of disease, and there is no timely drainage. The most basic method of prevention and treatment is to mix the seeds of American ginseng and agents against black spot when planting. This can enhance the resistance of American ginseng. When the disease occurs, we need to use Bordeaux solution and chlorothalonil to spray alternately.

2. Epidemic disease

The epidemic disease of American ginseng usually occurs in June and July in summer, when the temperature is very high and there is more rainfall, so it is easy to cause the epidemic disease. The main harm of the disease is the root of American ginseng, which makes the root of American ginseng rotten. If there is no timely prevention and control, basically none of the American ginseng you dig up will be intact. The method of prevention and control is to set up a good ditch around when planting, so as to facilitate drainage. The second is that the plants used to cover American ginseng last year can not be reused, and finally, quicklime is sprinkled in the hole when planting. When the disease occurs, mancozeb can be used to prevent and cure it, and the effect is still very good.

3. Sudden collapse disease

The symptom of sudden collapse disease is that American ginseng seedlings lodging, and will slowly spread, there is a piece of lodging. It seriously affects the growth and yield of American ginseng, and its diffusivity and infectivity are very strong, so we have to be very careful in the usual field management, and we need to regulate the temperature and humidity in the field. Secondly, it is found that one or two inverted seedlings should be treated with drugs, and the agents used are carbendazim or antimycin. Carbendazim is mostly used to cover the soil and seed dressing, while antimycin is used to spray, but also can use Podol solution, the effect is the same.

4. Ground tiger

Ground tiger is the natural enemy of rhizome plants, it especially likes to bite the roots and stems of plants, which will affect the growth rate of plants and cause plants to stop growing. So we usually use trichlorfon to control, or buy some equipment to kill tigers.

5. Grub

Grubs are actually the most disliked pest of American ginseng, including all ginseng species. The main efficacy and valuable part of American ginseng is the root, and grub especially likes to eat root food. If you encounter grubs in the process of planting, you basically can't see any American ginseng produce if it is so serious, so in order to avoid your hard work, it will be torched. Then it is necessary to prepare for prevention in advance. When necessary, trichlorfon and phoxim EC should be used alternately to kill the pest.