. California greenhouse pests and their control. Insect pests; Greenhouse plants. in a slight cocoon among the foliage, and this stage lasts about three weeks. Multi- plication is continuous in greenhouses, the generations overlapping. Species Found In California Greenhouses Greenhouse leaf tier (celery leaf tier), Phlyc- taenia rubigalis (Guenee). The caterpillar is yellowish with a narrow green stripe down the back and a broader greenish stripe along each side. The wings of the moth are crossed with narrow, wavy, dark lines. This species is a com- mon outdoor pest on garden crops and orna- m
. California greenhouse pests and their control. Insect pests; Greenhouse plants. in a slight cocoon among the foliage, and this stage lasts about three weeks. Multi- plication is continuous in greenhouses, the generations overlapping. Species Found In California Greenhouses Greenhouse leaf tier (celery leaf tier), Phlyc- taenia rubigalis (Guenee). The caterpillar is yellowish with a narrow green stripe down the back and a broader greenish stripe along each side. The wings of the moth are crossed with narrow, wavy, dark lines. This species is a com- mon outdoor pest on garden crops and orna- mental plants. It readily invades greenhouses to feed on a wide variety of crops. CONTROL Control measures which are employed for the omnivorous looper are also used for the greenhouse leaf tier. LEAF ROLLERS Importance: The leaf rollers are a very destructive group of caterpillars. They not only tie together and feed on the ter- minal leaves but they often bore into flower buds and terminal shoots. They are very persistent pests when they be- come established in greenhouses. Appearance: The caterpillars are yel- lowish or pale greenish with a yellowish to black head. They are about 1/2 inch long when mature. When disturbed they wriggle violently, escaping backwards into their shelter or dropping by a silken thread. Adults are more or less tan in color, the wings having an oblique, dark band across the middle and usually a spot be- yond this on the front margin. They are. Fig. 44. Terminal growth of carnation showing injury by the carnation leaf roller. [34]. 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
