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Show Trof. Coo Issues Timely Advice to Apple Growers in Utah. All Cache Valley apple orchards orch-ards should be sprayed now to control codling moth worms, according ac-cording to Professor F. M. Coe of the Utah State Agricultural college col-lege who is in charge of tthe College Col-lege and experiment station orchards, orch-ards, where spraying tests have been conducted for the last five years. This first spray, called the calyx or petal fall spray, because it is applied just after the petals pet-als fall and before the calyx cups I close about ten days later, is very important in the worm control program because a considerable protection of the first brood worms attack the apple and seek to enter the fruit at the blossom blos-som or calyx end, and can be prevented from doing so only by the presence of a coating of in secticide in the calyx cup. Spraying Spray-ing should not be ' done before petals fall to avoid bee poisoning Arsenate of lead, 3 pounds to 1UU . gallons, with the addition of one fourth pound of dry spreader or one half-gallon of skim milk, is the material used to control worms in this spray. If Pacific Mite or Red Spider, as this pest Is more commonly called, has been troublesome the previous year, 2 pounds of colloidal sulfur sul-fur may be added. If aphids are bad, as evidenced by curling of the leaves, nicotine sulfate at the rate of three-fourths pint to 100 gallons may be added. Pear trees should be given the same application as apples. Peach and plum trees can be sprayed with the same mixture or mixtures at this time for Peach Twig Borer, which makes the fruit gummy and wormy, or this application may be delayed for two or three weks. Apricots and cherries should be sprayed now to avoid spray residues on the fruit at harvest. The same materials ma-terials may be used for these fruits also, the specific mixture depending on the pests presence. Experimental spraying got under - way Friday afternoon in the , college col-lege orchards with Red Astrach-ans, Astrach-ans, Yelloy Transparents, Winter Banana, and other early blossoming blossom-ing varieties. A number of different dif-ferent mixtures were applied, including in-cluding the addition of zinc sulfate sul-fate to the calyx spray materials at the rate of 2 pounds to 100 gallons for this control of "Little Leaf A zinc dificiency trouble which has become prevalent. |