control of the breeding of culex larvae in sewage wells by the use of abate, 5c

in order to determine the control of breeding sources of culex larvae in sewage wells by the larvicide abate, some studies were performed in the summer and autumn of 1972. in general, it was noticed in these studies that:1. the wells chosen as a control (5 wells) were active throughout the study periods and adult mosquitoes were captured plentifully. 2 in 4 sewage wells which were controlled by kerosene, after the distribution of kerosene the number of adults diminished and in some cases reached zero or near zero. these studies showed that the use of kerosene at ½ to one liter for each well is able to control the production source of mosquitoes for 10 to 12 days.3. abate capsules were investigated at various quantities. in a number of wells, one capsule was used at the beginning; it was observed that, in some cases, there were not many effects on the mosquito population. the next time, 2 capsules were used and it was noticed that the density of adult mosquitoes decreased considerably and reached zero. in some cases, some of these wells had no activity for mosquito production for 30 days. in some of the other wells, 2 capsules were used initially and it was observed that the density reached zero after 6-7 days, and they then remain zero for 20 to 22 days. in general, these studies showed that the abate capsule is a larvicide in sewage wells and that can control larvae.