Effect of Poplar Forest on Snail Control in Dongting Lake Area

摘要: Schistosomiasis is a parasitic infection caused by blood flukes (trematodes) of the genus Schistosoma. The intermediate host an aquatic or amphibious snail (Oncamelania hupensis) . World Health Organization describes schistosomiasis as 'the second most important (tropical disease) in terms public health importance' after malaria. It endemic 76 developing countries, putting over 600 million people at risk infection. Over 200 are estimated to be infected worldwide, with 20,000 deaths annually. Officials detected 10.58 square meters new habitats 2005, up 0.44 percent 2004 when China had 3.85 billion habitats, according figures from Ministry Health. To effective, control strategies should adapted local epidemiological situation and caution must taken destroying freshwater snails using chemicals - particularly impact on environment. One effective practices conducting forestry ecological engineering that focuses prevention through improving environment refraining propagation. Test plot located Dongting Lake, Hunan province, where usually was areas. Poplars were planted certain designs, site preparation done wipe out weeds pile ridges, spacing 6 m times 8 m, undisturbed check. After 12 years, results indicated density decreased 85.2%--100% poplar stands; while for check, figure increased 108.2%--120%, no found stands. With tree growing up, number fell. As well, poplars added incomes farmers. By experiment, it concluded reduce amount available forestation wet beach