Show FREEZE OUT INSECT PESTS method Is more economical than gas says an expert on the tha subject the usual procedure when flour mills become infested with the mediterranean moth the larvae of which get into the flour Is to close the mill tightly and gas the insects last winter a mill nt at williston N D however requested the local weather bureau office to notify the company whenever a temperature pera ture of 20 degrees or lower for at least several hours could be anticipated As soon as weather sufficiently cold was forecast the company put out all fires and opened doors and windows that night the temperature reached 30 degrees fahrenheit and did not grabove go above 17 de degrees gree s fahrenheit the next day according to the report of the company to the united states department part ment of agriculture through the weather bureau all moths and most of the wes eggs were frozen and the process will not have to be repented repeated for fit at least two tivo years many dollars worth of chemical insecticides which would have been necessary eslary for gass gassing lne were saved |