The Yellow Starthistle Plant

"Huang Wei is considered to be one of the most serious meadows in the northwestern part of the United States, one of grasslands and wild weeds" (DiTomaso). Astragalus spreads very quickly and grows in all climates. Therefore, management is difficult. This weed is very common in California. Astragalus membranaceus has a number of adverse effects on the life and water consumption of animals and other plants. Astragalus affects animals' lives. Many other animals can pasture this plant, but yellow ears are very toxic to horses.

Some species change the environment to make them more profitable for them, but they are disadvantageous for locals, which is called ecological promotion. A yellow spike has also been introduced on the west coast and secretes the compound 8-hydroxyquinoline from the roots. This chemical damages native plants and its chemicals destroy local competitors, so you can extend the range of the starter. Invasive species may enter the new environment through many pathways. Some were shipped to new places and were intentionally founded but gave unexpected results. In the 1980's, beach vitex was planted in the coastal area of ​​North Carolina as an ornamental plant for coastal families 6. Plants also do not have a wide root system that holds sand in place as a native plant. As it spreads, plants accelerate dunes erosion by removing plants that fix sand dunes

Sheep has been used effectively in the western region of the country to combat invading species such as spotted Yagurumagiku, lush scorpion and scutellum. Cows grazed with conventional crop keeps staying in the mountains of the west for several weeks during the summer and moves when reaching the height of major grass species such as bluegrass and rough fescue. When cattle, mainly herbivores, remain in the meadow for long periods, they show grazing selectivity and tend to choose nutrient grasses or young weeds instead of weeds and other harmful weeds. A rancher who allows more than 800 sheeps to graze before or after a cow's herd has confirmed that a large amount of Yagurumagiku is used in sheep and that grass has moderate utilization It is. See Figure 1 for a comparison of plant preferences for grazing livestock.