title: [Molluscicidal effects of 3 molluscicides by spraying and poudrage methods in dry season].
abstract: OBJECTIVE
  To evaluate the effects of 3 molluscicides namely 5% niclosamide ethanolamine granules, 4% "Luowei" (Tea-seed distilled saponins, TDS) and 50% wettable powder of niclosamide ethanolamine salt (WPN) by spraying and poudrage methods in marshland and lake regions in dry season.
  
  
  METHODS
  An environment with a high snail density was chosen as the experimental field, then the spraying and poudrage experiments were carried out in the field to assess the molluscicidal effects of 5% niclosamide ethanolamine granules, TDS and WPN delivered by spraying and poudrage methods with a concentration of 30, 6 and 2 g/m2, respectively, and the molluscicidal effects of the 3 drugs by the two methods were evaluated and compared in different time.
  
  
  RESULTS
  After the delivery for 15 d, the adjusted snail death rates of the 5% niclosamide ethanolamine granules, TDS and WPN in the spraying experiment were 79.00%, 82.29% and 84.83%, respectively, and those in the poudrage experiments were 97.42%, 95.27% and 96.62%, respectively.
  
  
  CONCLUSIONS
  The molluscicidal effect of poudrage method is better than the spraying method, and the former is worthy of further extension and application in the marshland in dry season.
authors.forename: Zhu-guo
authors.initials: ZG
authors.lastname: Xia
authors.forename: Zhe
authors.initials: Z
authors.lastname: Cao
authors.forename: De-bo
authors.initials: DB
authors.lastname: Zhang
authors.forename: Xun-yin
authors.initials: XY
authors.lastname: Liang
authors.forename: Xiu-bai
authors.initials: XB
authors.lastname: Yuan
authors.forename: Chuan-qiong
authors.initials: CQ
authors.lastname: Yin
authors.forename: He
authors.initials: H
authors.lastname: Cheng
mesh_terms: D000818:Animals; D002626:Chemistry, Pharmaceutical; D003140:Communicable Disease Control / Q000379:methods*; D060106:Lakes / Q000469:parasitology; D008975:Molluscacides / Q000737:chemistry; D009534:Niclosamide / Q000737:chemistry; D012449:Safety; D012621:Seasons
chemical_list: D008975:Molluscacides; D009534:Niclosamide