[Molluscicidal effect of suspension concentrate of metaldehyde and niclosamide in fields of mountainous areas in Yunnan Province].
OBJECTIVE
To evaluate the molluscicidal effect of 26% suspension concentrate of metaldehyde and niclosamide (MNSC) in the fields of mountainous areas in Yunnan Province.


METHODS
Some representative Oncomelania snail environments of schistosomiasis endemic regions were selected as study areas in Heqing County, Yunnan Province and 26% MNSC and 50% wettable powder of niclosamide ethanolamine salt (WPN) were used to kill the snails with the mechanical spraying and sprinkler spraying methods respectively.


RESULTS
Seven, 15, 30 days after the spraying with the mechanical spraying method, in corn fields, the snail mortality rates were from 88.68% to 92.88% in the MNSC group, and from 89.86% to 90.32% in the WPN group respectively, and in the ditch, the snail mortality rates were from 89.97% to 94.46% in the MNSC group and from 90.08% to 96.74% in the WPN group respectively, and there was no significant difference between the 2 groups (P > 0.05); 7, 15, 30 days after the spraying with the sprinkler spraying method, in corn fields, the snail mortality rates were from 66.14% to 89.11% in the MNSC group, and from 78.40% to 91.22% in the WPN group, respectively, in the ditch, the snail mortality rates were from 84.13% to 94.27% in the MNSC group, and from 85.81% to 95.26% in the WPN group respectively, and there was no significant difference between the 2 groups (P > 0.05).


CONCLUSIONS
26% MNSC has good molluscicidal effect in the fields of mountainous areas in Yunnan Province
Schistosomiasis Station of Heqing County, Yunnan Province, Heqing 671500, China.
Bing-Gui
BG
Li
Wen-Bao
WB
Li
Xi-Guang
XG
Feng
Yi
Y
Dong
Ming-Shou
MS
Wu
Zong-Ti
ZT
Shao
Liang-Xian
LX
Mu
Shu-Hui
SH
Tian
Ping
P
Li
Li-Ping
LP
Gao
Kang
K
Xiong
Xing-Qi
XQ
Dong
D000079:Acetaldehyde / Q000031:analogs & derivatives* / Q000633:toxicity; D000818:Animals; D002681:China; D006801:Humans; D008975:Molluscacides / Q000633:toxicity*; D009534:Niclosamide / Q000633:toxicity*; D010571:Pest Control / Q000295:instrumentation / Q000379:methods*; D012424:Rural Population; D012552:Schistosomiasis / Q000517:prevention & control; D012908:Snails / Q000187:drug effects* / Q000254:growth & development
D008975:Molluscacides; C002935:metaldehyde; D009534:Niclosamide; D000079:Acetaldehyde