. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. APPLE PESTS 517 Owing to their coloring, which resem- bles closely that of the bark upon which they often rest, and their habit of re- maining quiet during the daytime, these moths can very rarely be detected in the orchard. Occasionally one may be seen flitting about the trees at twilight, and very rarely we have observed them resting. Fig. 2. A
. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. APPLE PESTS 517 Owing to their coloring, which resem- bles closely that of the bark upon which they often rest, and their habit of re- maining quiet during the daytime, these moths can very rarely be detected in the orchard. Occasionally one may be seen flitting about the trees at twilight, and very rarely we have observed them resting. Fig. 2. Adult Resting on Apple. quietly upon the bark and leaves and even on the ground. When disturbed they start away with a swift zig-zag mo- tion very hard to follow. For the purpose of depositing eggs they normally fly only during the warm nights, and are pre- sumably most active during the twilight period. Recommendations for Northwest Conditions which are found in the East- ern states have but little bearing upon somewhat dissimilar conditions found in this section. Early spraying alone will not save the fruit, and it is not only prac- ticable but necessary to fight the second brood. So far as the codling moth is con- cerned, early applications, after the calyx lobes close are of very little value in Western Oregon and Washington. In the orchard sections of those regions the petals fall from the first week in May to several weeks later in sections along the coast. The first larvae enter the fruit at Cor- vallis, Oregon, rarely before June 25, so that a period of about six or seven weeks exists between the time of the calyx spray and the time when the larvae enter the fruit. This is in a great measure due probably to the fact that the eggs of the codling moth are not deposited until the evening temperatures reach 60 degrees Fahrenheit, or above. At Roseburg, Oregon, the records of the U. S. Weather Bureau for the past ten years were examined and notes made as follows: After May 20
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