Gerhard Armauer Hansen that the leprosy acts of 1877 and 1885 were passed, leading to a steady decline of the disease in Norway from 1,800 known cases in 1875 to just 575 cases in 1901. His distinguished work was recognized at the International Leprosy Congress held at Bergen in 1909. Hansen had suffered from syphilis since the 1860s but died of heart disease. He was an atheist. Gerhard Armauer Hansen Gerhard Henrik Armauer Hansen (29 July 1841 – 12 February 1912) was a Norwegian physician, remembered for his identification of the bacterium "Mycobacterium leprae" in 1873 as the causative agent of leprosy. Hansen
Specific replant disease died in situ—pathogens are likely to have contributed to the death and therefore be at a higher level in the soil. Soil fumigation is another common method employed to control replant disease in both apple and cherry trees. Throughout the 90's, fumigants like Methyl Bromide (Bromomethane) were commonly used in this way to control and treat the disease, through this was later phased out in the 2000s in favour of more modern alternatives such as Chloropicrin, which some studies have shown to be an effective method for resolving SARD in Apple Tree Monoculture in Europe. Specific replant disease Specific Replant