. Insect pests and plant diseases : containing remedies and suggestions recommended for adoption by farmers, fruit-growers, and gardeners of the province . Pests; Fungal diseases of plants; Insect pests. 60 Vict. Provincial Board of Horticulture. 19. Process of Development. Fig. 4. Development of male insect; (a) ventral view of larva after first molt; (6) same after second molt (propupa stage); (c) and (d) true pupa, ventral and dorsal view, all greatly enlarged. (L. 0. Howard and C. L. Marlatt, Bulletin No. 3, New Series, Division of Entomology, U. S. Department of Agricidture.) The male of
. Insect pests and plant diseases : containing remedies and suggestions recommended for adoption by farmers, fruit-growers, and gardeners of the province . Pests; Fungal diseases of plants; Insect pests. 60 Vict. Provincial Board of Horticulture. 19. Process of Development. Fig. 4. Development of male insect; (a) ventral view of larva after first molt; (6) same after second molt (propupa stage); (c) and (d) true pupa, ventral and dorsal view, all greatly enlarged. (L. 0. Howard and C. L. Marlatt, Bulletin No. 3, New Series, Division of Entomology, U. S. Department of Agricidture.) The male of this species is a winged insect. It is very minute, scarcely noticeable with- out a lens, very light and frail, at the mercy of the least puff of wind, and incapable of any great journey. The female has no perceptible legs, and is utterly incapable of motion. She resembles a yellowish or orange, flattened seed, in bulk many times that of the male; but firmly fixed to one point by the scaly covering which is at once her protection and her grave. The young are active for a very brief time, two or three days at most, and they crawl with considerable rapidity and great persistence, so that they might possibly descend from one tree and crawl for a number of yards to another; but the spread in this manner is insignificant. Where trees are close together they may pass from the branches of one to the branches of another; but they rarely crawl long in any one direction; they rather move around, rapidly enough, yet irregularly and at random. Usually they do not go further than is necessary to find a good place to fix, and at once begin to form a scale. This process is rather interesting and can be watched. As soon as the young louse has inserted its beak into the plant and has begun to feed, a change conies over it, and within a few hours it is entirely covered by a fine, white, waxy film. This turns first yellow and then grey or even black, and the creature is a fixture, absolutely inca
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsectpests, bookyear
