Oriental bittersweet, in comparison to many other competing species, is the better competitor in attaining sunlight. Oriental bittersweet Celastrus orbiculatus. Oriental bittersweet is a strong competitor in its environment, and its dispersal has endangered the survival of several other species. When Celastrus orbiculatus grows by itself, it forms thickets; when it is near a tree the vines twist themselves around the trunk as high as 40 feet. It also has a high cation-exchange capacity, which also supports the larger biomass. In a study where populations received above 28% sunlight, it exhibited a higher amount of growth and biomass. Every time he gets into it in our brush he gets huge puss filled blisters that spread every where and usually needs steriods & antibiotics to over come the plaque looking rash. The red, itchy blisters of a poison ivy reaction result when the skin brushes up against the leaves of the plant, leaving a sticky resin called urushiol deposited on the skin’s surface.  Open and abandoned habitats were also found to positively influence the spread of the plant compared to other invasive species. These steps must be repeated annually, or whenever regrowth is observed. People take American bittersweet for arthritis, fluid retention, and liver disorders. When placed in 10 different sites with varying light intensity and nitrogen concentration, Oriental bittersweet was found to have higher aboveground biomass as well as a lower mortality rate in comparison to its congener species, Celastrus scandens (American bittersweet). If one bittersweet vine isn’t enough for your garden, you can propagate it and grow more.  If Oriental bittersweet was exposed to 2% sunlight, then the TLL ratio decreased. Unfortunately Oriental bittersweet has also been shown to hybridize with the American bittersweet, leading to a loss of genetic identity. It can grow as a vine, plant or bush form. Invasive Species Oriental Bittersweet: Threats to native plants. Celasrus obiculatus is oriental bittersweet vine – a native of China, Japan and Korea. Histamines increase blood vessel permeability, allowing fluid containing white blood cells to flow into areas affected by the allergen.  Triclopyr is non-toxic to most animal and insect species and slightly toxic to some species of fish, but it has a half-life of less than a day in water, making it safe and effective for field use.  Additionally the species is heavily favored in edge habitats. The encircling vines have been known to strangle the host tree to death or break branches from the excess weight, which is also true of the slower-growing American species, C. scandens.  Focusing growth on stem length allows it to be in a strong position to absorb light, while also negatively impacting surrounding plant life by creating shade-like conditions.  This study used layers of woven cloth to control the percentage of available sunlight. This woody, deciduous, perennial vine has since naturalized and become an extremely aggressive and damaging invader of natural areas. The male and female flowers are on different plants. Bittersweet nightshade is a vine-like plant that is found throughout the United States, Canada, and parts of Europe and Asia. As a result, it is eaten by mammals and birds, which excrete the seeds to different locations.  There is also no biological control agent available in helping control this species. To minimize the effects of Oriental bittersweet's invasion into North American habitats, its growth and dispersal must be tightly managed. To name just three of them: If they are poisonous plants; If they are plants that cause rashes Its root and bark are used to make medicine. Oriental bittersweet is a woody vine that can form dense cover and pull down trees.  Experimental data has indicated that Oriental bittersweet has a strong ability to tolerate low light conditions “ranging on average from 0.8 to 6.4% transmittance ”.