Horticulture, a text book for high schools and normals, including plant propagation; . See method of determining hatching dates, page 194 The spray materials used should all contain arsenical poison so that the young larvse will be killed as soon as they begin to eat their way into the fruits. Arsenate of lead is usually preferred to Paris green. As the apple has a number of diseases, lime-sulfur or Bordeaux is usually applied at the same time. Arsenate of lead. paste mixed with lime-sulfur or Bordeaux at the rate of about three pounds of poison to each 50 gallons is applied as fine spray. TRi
Horticulture, a text book for high schools and normals, including plant propagation; . See method of determining hatching dates, page 194 The spray materials used should all contain arsenical poison so that the young larvse will be killed as soon as they begin to eat their way into the fruits. Arsenate of lead is usually preferred to Paris green. As the apple has a number of diseases, lime-sulfur or Bordeaux is usually applied at the same time. Arsenate of lead. paste mixed with lime-sulfur or Bordeaux at the rate of about three pounds of poison to each 50 gallons is applied as fine spray. TRis should be done not only just after the petals fall, but should be repeated again about two weeks later. This will counteract the attacks of the latest insects of the spring brood. 195 196 ENEMIES OP THE APPLE, PEAR, AND QUINCE Apple Borers.—The apple tree is attacked by several most common of these is the so-called flat headed apple treeborer, which is the larva of a buprestid beetle. The larva lives tree about two years and burrows chiefly in the sap wood and. Fig. 120.—Three stages for spraying apple and pear trees. 1, winter buds open, sprayfor scab, aphids, and bud moth. 2, pink or pre-blossom, spray for scab, bud moth, and leafroller. 3, calyx spray for scab and codling- moth. (Oregon Station.)
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectgardeni, bookyear1922
