. Elements of farm practice, prepared especially for teaching elementary agriculture;. Agriculture. PLANT DISEASES AND INSECT PESTS 149 Apple scab is a fungous disease which attacks the blossoms and other parts of the tree, finally manifesting its effect on the fruit, which becomes scabby and shriveled and drops. Extensive losses are suffered in this way. The disease is thought to be more prevalent in wet seasons. The remedy is to spray with Bordeaux mixture once before blossoming,. Figure 70.—Spraying fruit trees. and again immediately and a few days after the petals fall. Formula for Bordeau
. Elements of farm practice, prepared especially for teaching elementary agriculture;. Agriculture. PLANT DISEASES AND INSECT PESTS 149 Apple scab is a fungous disease which attacks the blossoms and other parts of the tree, finally manifesting its effect on the fruit, which becomes scabby and shriveled and drops. Extensive losses are suffered in this way. The disease is thought to be more prevalent in wet seasons. The remedy is to spray with Bordeaux mixture once before blossoming,. Figure 70.—Spraying fruit trees. and again immediately and a few days after the petals fall. Formula for Bordeaux Mixture Copper sulphate (blue vitrei), 5 lbs. Quicklime (not slaked), 5 lbs. Water, 50 gallons. Dissolve the copper sulphate in 25 or 35 gallons of water. Slake the lime m the remammg part of the water, and mix. To this amount ot Bordeaux mixture ^ lb. of Paris green may be added to form a general insecticide to be used on fruit-bearing bushes and trees. Scab and scale diseases may be similarly treated with the hme-sulphur solution. To control the codling-moth, there should be a midsummer spraying with two pounds of arsenate of lead to fifty gallons of water. Questions: 1. What can you say of the nature of plant diseases? 2. Learn to write down, without looking, the names of the diseases discussed m this lesson and the plants they 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 Wilson, Archie Dell, 1875-; Wilson, E. W. , joint author. St. Paul, Minn. , Webb Publishing Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
