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Show caterpillar which is to begin work in a week or more later? I saw one of the little creatures emerge from its egg and wander about tho surface sur-face of the apple for two or three hours, doing no feeding but simply I exploring, until it finally worked it3 little body through beteen two of the calyx lobes and disappeared within tho calyx cup. Further field work confirmed this observation, observa-tion, and showed that the little worms feed around in the calyx cup for a day or more before going deeper into the fruil Apples were then picked from a tree which had been sprayed just a'ter the petals fall, and a chemist demonstrated that there was arsenic in the covered cov-ered cup of the calyx. Giving the first spraying just after the utmost importance. Denrver Field and Farm. THE CODLING MOTH. -M. V. 8LINERLAND.- The Colorado law just passed prohibiting the spraying of fruit trees with poison when in bloom is all right and will really prove a good measure. My observations and experiments indicate that most of the eggs of the codling moth are not laid until a week after the blossoms have fallen, when the apples are about the size of hickory nuts. At this time, the calyx lobes on the young apples are drawn tightly . together, so that it would bo dfficu.lt for the moth to insert her egg in the calyx cup; in fact, the hoof-like , ovipositor of the female is only adapted for laying her egg on the surface of the fruit. The nearly round, very thin, scale-like, semi-trans semi-trans parent eggs, not quite so large as the head of a common pin, are glued to the outer skin of the apple, V? ' with apparently but little .choiool 'as to its location on the fruit. As it takes about a w eek for tho eggs to hatch, it is thus from ten days to two weeks after the blossoms fall fcefere tho caterpillar begins operation. opera-tion. If tho usual recommenda- t tions for spraying have been followed fol-lowed ' out, the first application of Paris green is made a week before tho eggs are laid, and the second application several days before the worms begin operations. With these facts before us, we were at a . loss to explain just how the poison could kill the worm. However, a etudy of the developing fruits disclosed dis-closed the following facts: When the petals of the blossoms fall, the calyx lobes, who remain, are broad- ( ly spread out saucer-like, and many minute particles of Paris green could bo and in fact are readily caught in the calyx cup. Put as about two weeks intervene before - the little caterpillar begins, much of this poison would ordinarily be t, washed out by the raius and tho Urst spraying be usless. However, nature prevents this by simply, - causing the culyx lobes to be drawn tightly together at their tips as the . apple grows, so that usually within a peek after the blossoms fall, the 5 calyx cup has its deadly dose of t- "Paris green, well protected by a cover formed by tho converged enlyx lobes. Now how is this poi- 'j3o nous dose to form part of the jrem at the first meal of the little i |