The Ministry of Agriculture held a national exotic invasive organism, Solanum nigrum L., to be eliminated on the spot.

Recently, the 2015 national exotic invasive organisms calyx nigrum), held in Xingan, Inner Mongolia. The Department of Science, Technology and Education holds national on-site activities for the elimination of alien invasive organisms three times a year, which aims to improve the broad masses of cadres and masses' awareness of ecological environmental protection and their ability to detect toxins and eliminate pests, exchange experiences in various places in the prevention and control of alien invasive organisms, and promote the work of biological prevention and control of alien invasions to a new level.

Solanum nigrum is an annual poisonous plant native to North America, and it is one of 52 kinds of alien invasive organisms to be prevented and controlled by the country. it is resistant to drought and barren and has a strong ability to reproduce. Invading farmland will seriously inhibit the growth of crops such as wheat, corn, cotton and soybeans, affect yield, and invade pastures will reduce grassland quality. Solanum nigrum is also the host of potato beetle and potato leaf roll virus, in which potato beetle is the most important and destructive quarantine pest in the world.

At present, the calyx nigrum), has spread to more than 12 counties (cities and banners) in Jilin, Hebei, Shanxi,

According to Zhang Guoliang, a researcher at the Institute of Agricultural Environment and Sustainable Development of the Chinese Academy of Agricultural Sciences, choosing one or more plants with strong adaptability, fast growth, high economic value and high canopy density in a short time is the best choice instead of controlling the calyx Solanum nigrum. In the demonstration area of alternative control technology of Solanum nigrum supported by the special scientific research project of public welfare industry (agriculture), "Research and demonstration and Popularization of Integrated Prevention and Control Technology of invasive plants", ideal combinations of alfalfa, tall fescue and Leymus chinensis have been selected. the results show that biological substitution can effectively control the spread of Solanum nigrum, and the average forage yield loss is 285.6 kg per mu. The direct economic benefit is about 427.5 yuan / mu.