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Show SPRAYING FOR CODLING MOTH Insect That Caues Wormy Apple May Be Controlled by Application of Arsenate of Lead. (I!y T.ltnNAItn IIAKKMA.V. frilv.-rslty of M!nsjin l. I'liUi-if of Aki IcultuM.-. I Tlii- codling moth Is tho Insect that usually cutiHoH wormy apples. The udiiltH appear In spring about tho tlmo tho upplo trees ure In bloom, and they remain for m.-veritl weeks. They deposit their eggs on the Htnouth s ' I ' ', ' - v ;'.--;;5'..v ''- ' . ; V '. '' '- '- ' r.V' V - .- . -, . IN- i .vi- T-.-V- V; . ' 7'rv"rc.'2., Fig. 1 Sprayed Tree Bore Four Barrels Bar-rels of Apples, 87.3 Per cent Marketable. Mar-ketable. surfaces of the leaves near the fruit and at times on the stems of the young fruit. The eggs hatch In a few-days few-days and the larvae of this first brood usually crawl to the blossom end of the apple and eat their way In. When the larva (worm) is full grown it eats its way out of the apple and goes into tho pupa stage under any kind of rubbish rub-bish or rough bark. The adult emerges, giving us the second brood, beginning about six or seven weeks after the bloom falls. The best spray for codling moth is arsenate of lead. Arsenate of lead paste should be used at a strength of about two and one-half pounds to EO gallons of water. Since the insect eats its way Into the blossom end. it Is very Important that the calyx I blossom blos-som end) be filled with the roison. The parts of the calyx close over tho calyx tube about seven days after the bloom falls, so It Is very important that the calyx tube be filled with the spray before this time 6ince It would not penetrate afterwards. The thoroughness thor-oughness of this spraying will largely determine the effectiveness of our season's sea-son's work. In some states a single very thorough spraying is all that is used on the apple orchard in one season, sea-son, though It has been found in this section that two or three sprayings ,'S-A 'i , - 1 N, 4 ,o , . , 1 rVC V 1W V . V - s Fig. 2 Unsprayed Tree Bore One Barrel Bar-rel of Fruit, 12.7 per Cent Marketable Market-able Note Scanty Foliage. will better control the codling moth. The first one is given as mentioned above within seven days after the bloom falls; the second in about two or three weeks and the third usually arly in July, or about six or seven weeks after the bloom falls. |