The Monthly Bulletin Volume 3 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...to produce injury by burning at this time of the year. The atomic sulphur spray: 10 pounds of the atomic sulphur to 100 gallons of water, is another aracnicide. CITRUS FRUIT INSECTS. The Citrus Red Spider. The red spiders are especially destructive to the citrus. Like the two-spotted mites, they are very minute and have eight legs when adult. They are generally reddish in color. They feed principally on the undersides of the leaves and are more abundant on the interior foliage of the tree. The infested leaves have a yellow, spotted appearance. Dusting the trees with flowers of sulphur on a night when dew is plentiful and followed by hot days, has produced fine results, according to J. A. Prizer, of the San Diego Fruit Company. Limesulphur solution, 2 per cent to 2 per cent strength, applied at a pressure of from 150 to 200 pounds, is generally used if unfavorable conditions exist for the dry sulphuring. Atomic sulphur, six1 to seven and one half pounds to 100 gallons of of water, is less likely to burn the leaves than the lime-sulphur solution. Spray when the mites become numerous enough to produce injury. In very hot weather it is not advisable to spray unless the situation demands it. The Soft Gray Scale. In certain parts of the State the soft gray scale is doing considerable damage to the citrus. The scale differs from the soft brown in that it is more gray in color, less shiny, the young appear to be more flattened and more transparent. As the scale has been little affected by fumigation at the time the best results are obtained in fumigating for the black scale, it seems neccessary to make a separate fumigation for this pest. Mr. Delacourt Kell, county horticultural inspector of the Pomona and Claremont district, has found that the best time to f...