| Show Safe Insecticides to Use on the Food Crops Is a Problem Not Easily Solved The question of poisonous insecticides insect cider on food crops is an important problem and one not easily solved observes Ruth Mosher writing in the Detroit News A balance must be maintained between the danger to human health and life lite and the threat to crops from Insects State Slate and national surveys are collecting evidence on both counts Cases of accidental death from insecticides reaching the courts of law are being studied and medical investigation has haa assembled facts on the degree of tolerance animal tissues display toward poisonous or toxic ingredients such luch as arsenate The introduction of pyrethrum sprays has to a large extent helped solve the problem Pyrethrum in horticultural doses is highly poisonous poi pol lonous to insects and completely harmless to animals man included A long list of insect pests prove to be fatally affected by the new pyrethrum sprays In a few cases it is useless Studies conducted by Prof Prot E. E I I. I McDaniel of Michigan State college and other scientists show that a number of questions remain still to be settled Pyrethrum for Instance varies at different seasons and at different temperatures in effectiveness Moreover Moreover Moreover More More- over it is still expensive to use on ona a large scale cale For the home gardener pyrethrum pyrethrum pyrethrum rum sprays are In the highest degree degree de de- gree valuable The slightly greater eater cost coat is 11 not to be measured against the danger of having about the home deadly poisons which mil may accidentally fall into the hands handl of ot children or adults ignorant of their nature On fruits and leaf crops pyrethrum I Is a safe and powerful Insecticide |
