Show new killer for water weeds the bureau of reclamation has just released information regarding a new killer for water weeds reports james R barker utah state extension entomologist this new material is is claimed to be cheaper 18 tp 20 cents per gallon and more effective than many chlorinated hydrocarbons formerly used the new material is is coal tar naptha mixed aith five percent of mahogany soap this material should be readily obtainable salt lake has in in fact promised to have plenty of the new killer available by the time moss becomes a menace to canals mr barker said if the canal is is carrying 12 cubic feet per second it will require 60 gallons applied over a peri period d of one hour or at the rate of one gallon of the mixture per minute he explained inasmuch as the amount of chemical necessary to control weeds is is directly proportional pio to the water in m the canal it is is economical to reduce the flow at the time of the treatment he advised however it will be necessary to have all the water weeds completely covered two very lvery important precautions are given in in the article first the new formula must be handled with caution because it is highly inflatable and because the fumes should not be inhaled second until more experiment al work is done the bureau recommends that the water be wasted after treatment instead of applying it to crop croos s they have found no injurious affects so far but say that more moie experimental work needs to be done before a definite statement is made about injury to crops |