OCR Text |
Show INCREASING GRAPE YIELD BY SPRAYING I K WORK OF GRAPE LEAF FOLDER ON GRAPE. materials as in the first application-, for the same fungous diseases and insects in-sects and for the grape berry moth, grape leaf folder, and adults of the-grade the-grade rootworm. Third Application About two weeks later use bordeaux mixture 4-3-50, arsenate ar-senate of lead paste 2 to 3 pounds, 40 per cent nicotine sulphate 1 part to 1,500 parts of the spray mixture, for fungous disease, berry moth, light ;Prora the United States Department of Agriculture.) Grape insect enemies and diseases may be controlled and a good crop of the berries practically assured if a' careful spraying' schedule is carried out, says A. L. Quaintance of the bureau bu-reau of entomology, and C. L. Shear of the bureau of plant industry of the United States department of agriculture. agricul-ture. Owners of small orchards and vineyards do not sufficiently appreciate appre-ciate the fact, the specialists point out, that by the expenditure of a little time and money a large proportion of the fruit may be saved, repaying many times the trouble involved in its protection. pro-tection. The principal insect enemies of the grape are the grape berry moth, tne grape rootworm, the rose chafer, the grape leaf folder, and the eight-spotted forester, all of which are eating insects; in-sects; and the grape leafhopper and the brown grape aphis, sucking insects. in-sects. The principal diseases which attack grapes are black rot, downy j mildew, powdery mildew, and an- j thracnose. 1 The use of combination spray solutions solu-tions containing chemicals which act as insecticides or fungicides is advocated advo-cated by the specialists. The following follow-ing spray schedule Is recommended: Spray Schedule. First Application About a week before be-fore the blossoms open or when the shoots are 12 to 18 Inches long, spray with bordeaux mixture, 4-3-50, for fungous fun-gous diseases, adding 2 to 3 pounds of arsenate of lead paste, or one-half that quantity of the powdered form, for flea-beetle, rose chafer, etc. Second Application Just after the blossoms fall, spray with the same Adult on Grape Leaf. spotted forester, grape leaf folder, brown grape aphis, grape rootworm, and grape leaf hopper. To destroy the leaf hopper, direct the spray against the lower surface of the leaves. To control the berry moth thoroughly coat the grape bunches with the spray. Fourth Application About 10 days later, or when the fruit is nearly grown, if black rot or mildew are still appearing, spray with neutral copper acetate or verdigris at the rate of 1 pound to 00 gallons of water. |