摘要
目的观察并比较无色和黑色塑料地膜覆盖法在丘陵山区的灭螺效果。方法选择钉螺密度较高的山区环境,设无色地膜、黑色地膜和未覆盖地膜对照组3个组。覆盖地膜后1、3、7、15、30 d对各组进行1次螺情调查,观察钉螺死亡率及钉螺密度下降率,并记录每小时气温、对照组土表温度、膜内土表及土下5、15 cm处温度。结果无色地膜组1、3、7、15、30 d钉螺死亡率分别为36.84%、78.94%、95.92%、100.00%和99.45%,覆盖30 d后较覆盖前钉螺密度下降率为99.36%;黑色地膜组1、3、7、15、30 d钉螺死亡率分别为10.08%、8.94%、6.11%、26.15%、49.32%,覆盖30 d后较覆盖前钉螺密度下降率为58.10%。无色和黑色地膜组覆盖地膜后1、3、7、15、30 d钉螺死亡率差异均有统计学意义(P均<0.01),覆盖地膜30 d后的活螺密度差异有统计学意义(P<0.001)。无色地膜内土表温度上升速度、幅度及持续时间均高于黑色地膜。结论夏季在丘陵山区覆盖无色地膜的近期灭螺效果明显优于黑色地膜。
Objective To evaluate and compare the molluscicidal effects of colorless and black plastic film covering methods against Oncomelania hupensis snails in hilly regions. Methods A hilly setting with high snail density was selected as the study area,and three groups including the colorless plastic film covering method,black plastic film covering method and control were designed. The snail surveys were conducted 1,3,7,15 days and 30 days in each group following plastic film covering,and the mortality of snails and reduction of snail density were investigated. The air temperature,soil surface temperature in the control group, as well as the soil surface temperature and the temperatures 5 cm and 15 cm under the soil within the film were recorded. Results The mortality rates of snails were 36.84%,78.94%,95.92%,100.00% and 99.45% 1,3,7,15 days and 30 days following colorless plastic film covering,respectively,and the snail density after 30 days of covering reduced by 99.36% as compared to that before covering,while the mortality rates of snails were 10.08%,8.94%,6.11%,26.15% and 49.32% 1,3,7,15 days and 30 days following black plastic film covering,respectively,and the snail density after 30 days of covering reduced by 58.10% as compared to that before covering. There were significant differences in the 1-,3-,7-,15-day and 30-day snail mortality rates between the colorless and black film covering groups(all P values 0.01),and a significant difference was detected in the snail density between the two groups 30 days after the film covering(P 0.001). In addition,the speed,amplitude and duration of the rise in the soil surface temperature within the colorless film were all greater than those within the black film. Conclusion The short-term molluscicidal effect of the colorless plastic film covering method is significantly superior to that of the black plastic film covering method in summer in hilly regions.
出处
《中国血吸虫病防治杂志》
CAS
CSCD
2013年第6期630-632,共3页
Chinese Journal of Schistosomiasis Control
基金
国家重大科技专项(2012ZX10004-220)
国家科技支撑计划(2009BA178B07)
江苏省卫生厅项目(X201103
X201114)
关键词
钉螺
塑料地膜
灭螺效果
丘陵山区
Oncomelania hupensis
Plastic film
Molluscicidal effect
Hilly region