Show Mans Man's Never-Ending Never War on His Insect Enemies One ODe war that net ne neer nc er ceases Is that waged aged by Insects Injects upon man Every year ear Insects cost the human race tall mil millions millions lions upon millions of ot dollars by their destruction of gro growing crowing Ing crops and stored han nances ests And they kill hill or maim thousands s of human beings by spreadIng Science Is constantly In investigating new means of keeping insect foes at bay and wonderful work has been done The stamping out of malaria In large areas once almost uninhabitable able and the tIle checking of the spread of sleeping sickness are examples of what his been accomplished row ow comes news of a ery whIch may open up entirely new lines of attack on Insect pests For Fora Fora a long time past a soun oun Australian scientist Dr r F G my l has be bern n endeavoring to find n way or of dealing with the flour beetle which does docs an nn enormous amount of has lias found that the proportion of grubs that turn Into miles mlles and fe- fe females fe- fe females fe females males can he be bv by re their food starve stane tan e a n hundred grubs rubs for one day and the majority will III de- de develop de develop clop Into mile beetles Aon o sow the fermie beetle may lay thousands of eggs es If 11 therefore be his found n a means of decreasing the number of the beetle pest flay be kept do down don n Similar grin principles of sex se Se control may be found applicable to other Insect enemies of man |