Show chemicals boost insecticide W kill ll 11 dig big savina in time and money spent for insecticides spraying may come to utah farmers soon research by U B S department of agriculture scientists has uncovered chemical ex tenders which will greatly increase the time ume insecticide sect icide gnys will remain deadly against mst insects DOT DDT T oil solution sprayed on the foliage of spruce and ana pine eine trees was e effective against files I 1 es for tor less than 15 days when a ethyl wa wo died hista of oil as a for the tho dilt spray bray sl pea the foliage killed lied flies files for 60 days and long er ah ten times as long with a chemi out gelp knowlton extension kist gist at utah sute state AvI agricultural cultural college in reporting rei orting rUng the research when chlorinated ter phenyls was added to such sprays as aldrin and they provided nearly control for more than days wh when used M s rix onnal oil or sy prays I 1 Y they retain maln their fly ki killing ing ability for less than 10 days under outdoor weather conditi conditions om DDT in an oil baft does hot not log g on f bouce oil beats the bil bilam pM tra trat t et eithe lent car in with it ethyl vaporizes vaporizer orizes so fast fait after spraying that it leaves a deadly residue ox of DDT on A the outside of lea leaves NM where it 11 can am kill insects this residue does not wash away easily ikmet weather 1 |