title: [Molluscicidal effect of 10% LDS in fields].
abstract: OBJECTIVE
  To evaluate the molluscicidal effects of 10% salt of quinoid-2', 5-dichloro-4'-nitrosalicylanilide (LDS) on Oncomelania hupensis in the fields, so as to provide the evidence for the application of LDS in the fields.
  
  
  METHODS
  The fields where O. hupensis density was relative high were selected as the experimental area and the different concentrations of LDS were used for molluscicidal effects with the immersion, insufflation and powdering methods, and 50% wettable powder of niclosamide ethanolamine salt (WPN) was used as the control.
  
  
  RESULTS
  With the immersion method for 3 days, the snail death rates of LDS (0.1, 0.2 g/m3) were lower than those of WPN (2 g/m3, P < 0.01), but the snail death rates of LDS (0.4, 0.6, 0.8 g/m3) were similar with those of WPN (2 g/m3, P > 0.05). With the insufflation and powdering methods for 7 days, the snail death rates of LDS (0.2, 0.4 g/m2) were lower than those of WPN (2 g/m2, P < 0.01), but the snail death rates of LDS (0.6, 0.8, 1.0 g/m2) were similar with those of WPN (2 g/mI2, P > 0.05).
  
  
  CONCLUSIONS
  LDS has some molluscicidal effect.
authors.affiliation: Jiangling Institute of Schistosomiasis Prevention and Control, Hubei Province, Jiangling 434100, China.
authors.forename: Xia
authors.initials: X
authors.lastname: Zhang
authors.forename: Hua-Ming
authors.initials: HM
authors.lastname: Zhang
authors.forename: Xiong
authors.initials: X
authors.lastname: Liu
authors.forename: Xian-Bing
authors.initials: XB
authors.lastname: Rong
authors.forename: Rui
authors.initials: R
authors.lastname: Yang
mesh_terms: D000818:Animals; D008975:Molluscacides; D012458:Salicylanilides; D012908:Snails
chemical_list: D008975:Molluscacides; D012458:Salicylanilides; C034596:salicylanilide