. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Beneficial insects; Insect pests. ORDER THYSANOPTERA 91 thri]is. It occurs on quite a large variety of plants. It is similar to Thrips iritici in size, but different in some micro- scopic details. It is injurious to onions. Massachusetts, Iowa, Colorado, Rhode Island, and Ohio have all reported. Fig. 51.—The pear thrips {Euthrips pi/ri): adult. Much enlarged. (After Moulton, Bur. Ent., U. S. Dept. Ag.) extreme injury from this species. The degree of injury is determined in large part by temperature, moisture
. Agricultural entomology for students, farmers, fruit-growers and gardeners. Insects; Beneficial insects; Insect pests. ORDER THYSANOPTERA 91 thri]is. It occurs on quite a large variety of plants. It is similar to Thrips iritici in size, but different in some micro- scopic details. It is injurious to onions. Massachusetts, Iowa, Colorado, Rhode Island, and Ohio have all reported. Fig. 51.—The pear thrips {Euthrips pi/ri): adult. Much enlarged. (After Moulton, Bur. Ent., U. S. Dept. Ag.) extreme injury from this species. The degree of injury is determined in large part by temperature, moisture, etc. It occurs on many plants besides onions. In dry seasons it becomes very injurious to the onions. The leaves wilt and show whitening, and the injury is easily 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 Osborn, Herbert, 1856-1954. Philadelphia ; New York : Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectb, booksubjectinsects
