|Agricultural Development and Vector-Borne Diseases (FAO - HABITAT - UNEP - WHO, 1996, 91 p.)|
|Topic J: Plant protection, pest control and chemical inputs|
Slide J.17 Focal application of Bayluscide® in an irrigation canal, Egypt
Studies of snail distribution and human water contact patterns show that in most irrigation schemes transmission is focal rather than widespread. Consequently, chemical and manpower can be saved if snail control is effected at these transmission sites.
In Sudan this is done by applying one kilogram of Bayluscide® as 70% wettable powder mixed with 10 liters of water over a period of 40 minutes. The concentration achieved is 2-3 ppm of the active ingredient This application is done about 300 meters upstream from the village and will keep the target reach of the canal (i.e. the potential transmission sites at the village) free from snails for about 4-6 weeks, when the next application is carried out