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Show lished by inserting about 12 drops of a white mineral oil-pyrethrum material into the tip of each ear about the time the slks start to wilt, entomologist Knowlton advised. ad-vised. This new insecticide and the "oil can" type applications now are beginning to appear upon our local markets. The treatment is largely a development of the U. S. bureau of entomology and plant quarantine. Dust Now To Avoid Loss From Tomato Worm Now is the time to dust for tomato to-mato fruitworm if large losses from this pest are to be aoided." declared Dr. G. F. Knowlton, research re-search associate professor of entomology ento-mology at the Utah Agricultural Experiment station Monday. Worms begi ntheir destruction when the tomato fruits reach a diameter of about one inch and one worm may destroy several fruits, said Dr. Knowlton. Last year this pest caused serious losses los-ses in, the tomato crop throughout the state, and another serious outbreak out-break is anticipated for this year, he added. Experiments conducted in Utah by U. S. bureau of entomology and plant quarantine and the Utah Agricultural Experiment station entomologists en-tomologists have shown that natural nat-ural cryolite containing 70 per cent sodium fluoride mixed with corn flour or talc gives better con-ate, con-ate, the entomologist pointed out. Two applications of this material should be made to obtain effective effect-ive -protection, and the second treatment should be made approximately ap-proximately two weeks after the first. To be most effective, the dust should cover the entire plant, as most of the fruitworm eggs are laid on the outer, smaller leaves. If all foliage is coated with poison, the worms are killed immediately after hatching when they feed upon the leaves, before I they move to the tomato fruits. The warm that attacks tomato . fruits is the same that attacks corn, and it is also known as the .' corn earworm, Dr. Knowlton said. , ! Protection of sweet corn from attack at-tack by the worms is best accomp- |
