This report discusses the automatic distribution of Paris green for control of Anopheles breeding along irrigation canal banks. Two modifications of the original automatic Paris green distributor are described. One is an improved machine for using Paris green diluted with dust, such as powdered charcoal. The other is for dustless Paris green in a water suspension.
The modified machine for distribution of dust was given thorough field trials and performed satisfactorily, with effective larva control. The other machine had fewer trials but seemed to function well.