[Molluscicidal effect of 5% powder of niclosamide ethanolamine salt granules (NEG) in field of mountainous areas in Yunnan Province].
OBJECTIVE
To evaluate the molluscicidal effect of 5% powder of niclosamide ethanolamine salt granules (NEG) in the field of mountainous areas in Yunnan Province.


METHODS
The grasslands with Oncomelania hupensis snail habitats were chosen in Beideng Village, Heqing County, Yunnan Province, and were divided into 7 groups (groups of NEG 30 g/m2, NEG 40 g/m2, NEG 50 g/m2, NEG 40 g/m2 plus obstacle clearing, 50% niclosamide ethanolamine salt wettable powder (WPN) 6 g/m2, WPN 6 g/m2 plus obstacle clearing, and fresh water). The snail death rates and the densities of living snails were investigated and the results were compared in the different groups 7 d, 15 d, and 30 d after the implementation.


RESULTS
Seven d, 15 d, and 30 d after the implementation, the snail death rates of the groups of NEG 30 g/m2, 40 g/m2, and 50 g/m2 were from 72.75 % to 95.83%, and the average descent rates of living snail densities were from 72.26% to 95.54%. Seven d, 15 d, and 30 d after the implementation, in the NEG 40 g/m2 group, the snail death rates were from 81.69% to 87.19%, and the average descent rates of living snail densities were from 81.42% to 87.91% ; in the NEG 40 g/m2 plus obstacle clearing group, the snail death rates were from 84.89% to 88.24% and the average descent rates of living snail densities were from 85.63% ~ 88.22%; in the WPN 6 g/m2 group, the snail death rates were from 85.23% to 86.17% and the average descent rates of living snail densities were from 85.76% to 86.05%; in the WPN 6 g/m2 plus obstacle clearing group, the snail death rates were from 88.89% to 92.10% and the average descent rates of living snail densities were from 86.71% to 92.20%. The obstacle clearing improved the molluscicidal effect.


CONCLUSIONS
NEG has a good molluscicidal effect in the field of mountainous areas in Yunnan Province.
Xi-guang
XG
Feng
Bing-gui
BG
Li
Wen-bao
WB
Li
Ming-shou
MS
Wu
Ning-bo
NB
Huang
Yun
Y
Zhang
Meng-tao
MT
Xiong
Liang-xian
LX
Mu
Shu-hui
SH
Tian
Ping
P
Li
Mei-fen
MF
Shen
Li-fang
LF
Wang
Jing
J
Song
Jia-yu
JY
Sun
D000818:Animals; D002681:China; D004983:Ethanolamines / Q000494:pharmacology*; D008975:Molluscacides / Q000494:pharmacology*; D009534:Niclosamide / Q000494:pharmacology*; D011156:Population Density; D011208:Powders; D012908:Snails / Q000187:drug effects*
D004983:Ethanolamines; D008975:Molluscacides; D011208:Powders; D009534:Niclosamide