. Diseases of economic plants. Plant diseases. Vegetable and Field Crops 177 of several spots. The spots soon become brown, and the central part turns ashen-white and is seen by the aid of a hand lens to bear numerous hyphge. The leaves may bear so many spots as to appear as though scorched, and often death results to the entire plant. The disease spreads most rapidly in damp, warm weather. Market! difference in varietal resistance was reported by. Fig. 96. — Early-blight of celery. Original. Tracy as early as 1885, the Boston Market and Golden Heart suffering much, while the White Plume was b
. Diseases of economic plants. Plant diseases. Vegetable and Field Crops 177 of several spots. The spots soon become brown, and the central part turns ashen-white and is seen by the aid of a hand lens to bear numerous hyphge. The leaves may bear so many spots as to appear as though scorched, and often death results to the entire plant. The disease spreads most rapidly in damp, warm weather. Market! difference in varietal resistance was reported by. Fig. 96. — Early-blight of celery. Original. Tracy as early as 1885, the Boston Market and Golden Heart suffering much, while the White Plume was but slightly injured. All plants showing a trace of disease should be rejected. Healthy plants from infected lots may with advantage be dipped in Bordeaux mixture to cleanse them of adhering spores. Spraying with ammoniacal copper carbonate or Bordeaux mixture is effective. Treatment should be begun before the disease appears, i. e., in the seed bed, and con-. 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 Stevens, Frank Lincoln, 1871-1934; Hall, John Galentine, 1870-. New York, Macmillan
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Keywords: ., bookauthorstevensf, bookcentury1900, bookdecade1920, bookyear1921
