The practice of spraying to prevent insect injury; The Bark-Lice of the apple and pear; The Buffalo Tree Hopper; Insects affecting corn in southern Ohio; The Ox Warble Fly or Rot-Fly; Fungous diseases of plants and their diseases; Directions for collecting, preserving and studying plants
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Publisher:Ohio Agricultural Experiment Station
Series/Report no.:Ohio Agricultural Experiment Station. Bulletin. 19
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