. Injurious insects : how to recognize and control them . Insect pests; Insect pests. Fig. 530.— The time to spray for the Cod- Ung Moth. The calyx still open. Original. suitable shelter, and spins its cocoon. Here it may remain until the next spring, but in the Central and Southern states there is a second brood. The larvae of the latter often feed merely on the surface of the apple in- stead of boring into it. Control consists in spray- ing with arsenate of lead. The most important point is to apply the material just after the blossoms fall, while the calyx cup is stUl open, and to direct th
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. Fig. 530.— The time to spray for the Cod- Ung Moth. The calyx still open. Original. suitable shelter, and spins its cocoon. Here it may remain until the next spring, but in the Central and Southern states there is a second brood. The larvae of the latter often feed merely on the surface of the apple in- stead of boring into it. Control consists in spray- ing with arsenate of lead. The most important point is to apply the material just after the blossoms fall, while the calyx cup is stUl open, and to direct the spray so that the poison will lodge in the blossom end of the up- turned apples. A second spraying about tlu'ee weeks later, at the time when the worms are just hatcliing, will augment the value of the first, because the larvae feed a little on the leaf before going to the apple. For the second brood in midsummer arsenate of lead is used, as for the first brood. The Lesser Apple Worm (Laspeyresia (Enariiionia) prunivora Walsh) Injury to the fruit of ap- ples by the lesser apple worm is often confused with that of the codling moth, but is distinct on careful examina- tion. Early in the season the injmy is apt to take the form of small ca's-ities eaten. Fig. 531. —Too late to spray tor the Cod- ling Moth. The calyx closed. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
