. Caterpillars attacking tomatoes. Caterpillars; Tomatoes. Bul. 625] Caterpillars Attacking Tomatoes 21 Many pupae can be destroyed by thorough fall plowing which exposes them to the rigors of climate and to their natural enemies. Cultivation probably results in the death of some pupae and also destroys weeds that might serve as hosts for the larvae. The tomato vines should be destroyed as soon as harvest is complete as a sanitary practice. This would put an abrupt end to any further. Fig. 11.—Hyposoter exiguae (Vier.), a common hy- menopterous parasite of the corn-earworm larva: A, adults; B,
. Caterpillars attacking tomatoes. Caterpillars; Tomatoes. Bul. 625] Caterpillars Attacking Tomatoes 21 Many pupae can be destroyed by thorough fall plowing which exposes them to the rigors of climate and to their natural enemies. Cultivation probably results in the death of some pupae and also destroys weeds that might serve as hosts for the larvae. The tomato vines should be destroyed as soon as harvest is complete as a sanitary practice. This would put an abrupt end to any further. Fig. 11.—Hyposoter exiguae (Vier.), a common hy- menopterous parasite of the corn-earworm larva: A, adults; B, cocoons with the host skins attached. build-up in the population, and tend to reduce the number of overwin- tering forms. Varieties.—Because the corn-earworm infestation becomes more acute as the season progresses, varieties of tomatoes which mature early in the canning season should be selected. The grower should set his plants in the field early enough so that they come into production as soon as the canning season opens. Tomatoes that mature early may escape a heavy infestation. Our investigations indicate that pear-shaped tomatoes are probably less seriously injured than the standard varieties. Parasites.—Each year parasites destroy large numbers of corn-ear- worm larvae. Probably the most common one encountered is the hy- menopterous parasite, Hyposoter exiguae (Vier.) shown in figure 11. This insect attacks the caterpillars when they are small, and completes its development long before they reach maturity. "When mature, the para-. 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 Michelbacher, A. E. (Abe Ezra), 1899-1991; Essig, E. O. (Edward Oliver), b. 1884. Berkeley, Cal. : Agricultural Experiment Station
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Keywords: ., bo, bookcentury1900, booksubjectcaterpillars, booksubjecttomatoes
