title: [Short-term effect of black film covering on Oncomelania hupensis snail control in marshland and lake regions].
abstract: OBJECTIVE
  To evaluate the short-term effect of the black film covering combined with niclosamide on Oncomelania hupensis snail control in marshland and lake regions.
  
  
  METHODS
  A ditch with snails in Anxiang County was selected as the experimental sites. The ditch was divided into 3 groups: a film group, a niclosamide group, and a niclosamide and film group. The snails were surveyed before the test and 1, 3, 5, 7 days after the experiment.
  
  
  RESULTS
  After the film covering, the highest temperature of the surface of soil was 63.7 degrees C on the first day, and the temperature higher than 40 degrees C lasted 4.34 hours. On the second day, the highest temperature was 52.3 degrees C, and the temperature higher than 40 degrees C lasted 4.96 hours. On the fourth day and fifth day, the temperature was lower than 30 degrees C, while the temperature was lower than 34 degrees C on the sixth day. On the seventh day of the experiment, the snail death rates of the film group, the niclosamide group, and the niclosamide and film group on the soil surface were 16.36%, 58.40% and 53.57%, respectively. On the seventh day, the snail death rates of the film group, and the niclosamide and film group under the soil were 20.00% and 40.00%, respectively, while no snails were found under the soil in the niclosamide group 3 days after the experiment. In mesh bags, the snail death rates of the film group, the niclosamide group, and the niclosamide and film group were 84.00%, 95.33% and 95.33%, respectively.
  
  
  CONCLUSIONS
  The short-term effect of the black film covering on snail control is not obvious, and the black film covering does no promote the molluscicidal effect of niclosamide.
authors.affiliation: Department of Epidemiology, School of Public Health, Fudan University, Ministry of Education, Tropical Disease Research Center, Fudan University, Shanghai 200032, China.
authors.forename: Sheng-bang
authors.initials: SB
authors.lastname: Zheng
authors.affiliation: Department of Epidemiology, School of Public Health, Fudan University, Ministry of Education, Tropical Disease Research Center, Fudan University, Shanghai 200032, China.
authors.forename: Yi-biao
authors.initials: YB
authors.lastname: Zhou
authors.affiliation: Department of Epidemiology, School of Public Health, Fudan University, Ministry of Education, Tropical Disease Research Center, Fudan University, Shanghai 200032, China.
authors.forename: Lin-han
authors.initials: LH
authors.lastname: Li
authors.affiliation: Department of Epidemiology, School of Public Health, Fudan University, Ministry of Education, Tropical Disease Research Center, Fudan University, Shanghai 200032, China.
authors.forename: Jin-yi
authors.initials: JY
authors.lastname: Wu
authors.affiliation: Department of Epidemiology, School of Public Health, Fudan University, Ministry of Education, Tropical Disease Research Center, Fudan University, Shanghai 200032, China.
authors.forename: Bao-dong
authors.initials: BD
authors.lastname: Yao
authors.affiliation: Anxiang Office of Leading Group for Schistosomiasis Control, China.
authors.forename: Shao-ping
authors.initials: SP
authors.lastname: Zhu
authors.affiliation: Anxiang Office of Leading Group for Schistosomiasis Control, China.
authors.forename: Cheng-jian
authors.initials: CJ
authors.lastname: Wei
authors.affiliation: Huangshantou Station for Schistosomiasis Control, China.
authors.forename: Fu-ping
authors.initials: FP
authors.lastname: Li
authors.affiliation: Hunan Institute of Parasitic Diseases, China.
authors.forename: Ben-jiao
authors.initials: BJ
authors.lastname: Hu
authors.affiliation: Hunan Institute of Parasitic Diseases, China.
authors.forename: Guang-hui
authors.initials: GH
authors.lastname: Ren
authors.affiliation: Hunan Institute of Parasitic Diseases, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Yi
authors.affiliation: Department of Epidemiology, School of Public Health, Fudan University, Ministry of Education, Tropical Disease Research Center, Fudan University, Shanghai 200032, China.
authors.forename: Qing-wu
authors.initials: QW
authors.lastname: Jiang
mesh_terms: D000818:Animals; D003140:Communicable Disease Control / Q000295:instrumentation / Q000379:methods*; D060106:Lakes / Q000737:chemistry; D008975:Molluscacides / Q000633:toxicity*; D009534:Niclosamide / Q000633:toxicity*; D010571:Pest Control / Q000379:methods*; D012908:Snails / Q000187:drug effects* / Q000254:growth & development; D012987:Soil / Q000737:chemistry; D013696:Temperature; D053833:Wetlands
chemical_list: D008975:Molluscacides; D012987:Soil; D009534:Niclosamide