OCR Text |
Show USES OF DDT EXPLAINED BY ENTOMOLOGIST DDT is useful against a number num-ber of ganden insect pests, but against certain others, such as the Mexican bean beetle and the squash bug, present forms of DDT have proved less effective, or only equal to previously used insecticides, insecti-cides, Dr. G. F. Knowlon, extension exten-sion entomologist at Utah State Agricltural College, reports, according ac-cording to County Agent S. R. Boswell. In general, DDT dusts and water-sprays have proved best for garden insect control. Foliage of a few vegetable plants have been injured by these materials. DDT-Oil DDT-Oil sprays, such as are , recommended recom-mended for fly, bedbug and mosquito mos-quito control, should never be sprayed on green plants, or burning burn-ing of the foliage can be expected. expect-ed. DDT-iAeroSol preparations may become useful in controlling certain aphid and other vegetable pests, as prices of such materials permit such garden insect control ue. Less expensive equipment will be possible for aerosol application appli-cation than generally is required for large-scale crop spraying and dusting programs, Dr. Knowlton pointed out. s Buy DDT compounds from reliable re-liable dealers and read the labels to see that you are purchasing the desired product, in the right concentration, the extension entomologist ento-mologist advised. A new development recently announced by the U. S. Dept. of Agriculture is that 5 DDT dust was as effective as other insecticides insecti-cides against the pea weevil, onion on-ion thrips and Colorado potato beetle, as well as against flea beetles on potatoes. This "wonder "won-der insecticide" has also worked well against certain plant bugs and leafhoppers, Dr. Knowlton reported. |