Show government issues information on water weed ki killer the bureau of reclamation lias has just released information may 1848 1948 iss issue U e ot of the reclamation cla jorn at ion era itra regarding a new killer for water weeds reports james H R darker barker this new material is claimed 0 jo o be cheaper 18 to 42 cents per gallon galion and more effective ee than I 1 many chlorinated hydrocarbons formerly aly used the new material is coal tar naptha mixed with five per cent of mahogany soap this material should be readily obtainable tai salt lake has in fact promised to have plenty of the new killer available by the time moss becomes a menace to the canals canal here is how the reclamation era kra service describes the use of the new material field trials so far have indicated that parts of the chemical to one million parts of water gives sati sat Is factory control when this concentration cent ration is maintained over a period of one hour in contact with the water weeds to obtain parts per million parts of water for an hour 5 gallons of the chemical formulation must be applied to each cubic foot per second of flow over a period of one hour if the canal is carrying 12 cubic feet per second it will require 60 gallons applied over a period of one hour or at the rate of one gallon of the mixture per minute inasmuch as the amount of chemical necessary to control weeds is directly proportioned to the water in the canal it is economical to re duce the flow at the time of treatment however it will be necessary to have all ali the water weeda weeds completely covered two very important precautions are given first the new formula must be handled with caution because it is highly and because the fumes should not be inhaled second until more knore experimental work is done the bureau recommends that the water be wasted after treatment instead of applying it to crops they have found no injurious effects so far but say that more expert mental work needs to be done before a definite statement Is made about injury to crops each year nearly boy scouts earn the coveted engle aal scout stout rank |