. Caterpillars attacking tomatoes. Caterpillars; Tomatoes. 6 University of California—Experiment Station farmer, observing these larvae, and confusing them with the corn ear- worm, frequently begins control measures against the latter at a time when his efforts will be of little value. These larvae are not always inju- rious and may be present in fields where the corn earworm would never become a problem and therefore no control would be necessary. The Alfalfa Looper.—One of the most common of these insects is the alfalfa looper, Autographa californica (Speyer) (fig. 3, B). The eater-. Fig. 3.
. Caterpillars attacking tomatoes. Caterpillars; Tomatoes. 6 University of California—Experiment Station farmer, observing these larvae, and confusing them with the corn ear- worm, frequently begins control measures against the latter at a time when his efforts will be of little value. These larvae are not always inju- rious and may be present in fields where the corn earworm would never become a problem and therefore no control would be necessary. The Alfalfa Looper.—One of the most common of these insects is the alfalfa looper, Autographa californica (Speyer) (fig. 3, B). The eater-. Fig. 3.—A, Full-grown larvae of the sugar beet army- worm, Laphygma exigua (Hbn.) ; B, full-grown larvae of the alfalfa looper, Autographa calif ornica (Speyer). pillars are green and longitudinally striped with fine whitish lines. In crawling they arch their backs, for which characteristic they are called "; This insect is a foliage feeder; in only a single case was one found feeding on a fruit. They tend to feed towards the center of the tomato vine. In all of our experiences we have never seen them doing sufficient damage to justify control measures. Sugar Beet Armyworm.—Another very common larva which is mis- taken for the corn earworm is the sugar beet armyworm, Laphygma exigua (Hbn.) (fig. 3, A). This larva, sometimes present in tomato fields in large numbers, is usually green in color. It feeds towards the inside of the vine and is mainly a foliage feeder, although it may sometimes attack the fruit. However, very little damage is done to the fruit in comparison with that caused by the corn earworm. Certainly the presence of this insect early in the season would not justify control measures. Larvae of both of the above-mentioned insects can be distinguished from the corn earworm by the integument, which is rather smooth and. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - color
Size: 1793px × 1394px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, booksubjectcaterpillars, booksubjecttomatoes
