. California greenhouse pests and their control. Insect pests; Greenhouse plants. Fig. 31. Adult females of the hemispherical scale on fern. mottled appearance. Living young are produced. It is primarily a greenhouse pest, although it also is destructive out- doors in California. Practically all types of greenhouse plants serve as hosts. Hemispherical scale, Saissetia hemis- phaerica (Targioni). Adult females are strongly convex, hard, brown, smooth and shining. The skin is covered with tiny, round, pale areas. The undersurface of the female forms a cup as a tremen- dous number of eggs piles u
. California greenhouse pests and their control. Insect pests; Greenhouse plants. Fig. 31. Adult females of the hemispherical scale on fern. mottled appearance. Living young are produced. It is primarily a greenhouse pest, although it also is destructive out- doors in California. Practically all types of greenhouse plants serve as hosts. Hemispherical scale, Saissetia hemis- phaerica (Targioni). Adult females are strongly convex, hard, brown, smooth and shining. The skin is covered with tiny, round, pale areas. The undersurface of the female forms a cup as a tremen- dous number of eggs piles up. A great many plants are subject to attack, ferns being one of the favorites. Other Species Found In California Greenhouses Elongate soft scale, Coccus elongatus (Sig- noret), is similar in appearance to the soft brown scale, but the body is considerably more elongate as a rule. Living young are produced. It is not as commonly encountered as that species, and it is more restricted to greenhouses. A variety of tropical plants serve as hosts, palms being one of the favorites. Orchid soft scale, Coccus pseudohesperidum (Cockerell). Adult female is elliptical and flat- tened, leathery, black, with a narrow yellowish margin, and with thin patches of wax on the back. Living young are produced. This scale is generally distributed on orchids in California greenhouses, dendrobium being a 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 Pritchard, A. Earl (Arthur Earl), 1915-1965. Berkeley, Calif. : California Agricultural Experiment Station, College of Agriculture, University of California
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Keywords: ., bookcentury1900, booksubjectgreenhousepl, booksubjectinsectpests
