. Manual of vegetable-garden insects. fifth stage nymph of theplant attacked. In thecase of potatoes, the in-jury is similar to thatproduced by several otherinsects and is known astip-burn. This is mostserious in years ofdrought. The bugssometimes puncture beanpods, arresting growth atthe point of injury. Inthe case of beets thepunctures cause a curlingor kinking of the leaves(Fig. 122) and in severecases a stunting of theplants. The bugs oftenattack celery plants that are five nymphal stages, the insect becom-ing mature at the fifth molt. The life cyclerequires from twenty-five to thirty days
. Manual of vegetable-garden insects. fifth stage nymph of theplant attacked. In thecase of potatoes, the in-jury is similar to thatproduced by several otherinsects and is known astip-burn. This is mostserious in years ofdrought. The bugssometimes puncture beanpods, arresting growth atthe point of injury. Inthe case of beets thepunctures cause a curlingor kinking of the leaves(Fig. 122) and in severecases a stunting of theplants. The bugs oftenattack celery plants that are five nymphal stages, the insect becom-ing mature at the fifth molt. The life cyclerequires from twenty-five to thirty days,and there are probably four or five genera-tions annually. Most of the injury to cultivated plantsis caused by the feeding punctures of theadults, since most of the nymphs are to befound on weeds. In feeding, the bugpunctures the plant with the sharp needle-like bristles of its beak and sucks out thejuices, at the same time apparently inject-ing some substance poisonous to the character of the injury varies with thenature. Fig. 122. — Beet leaf kinked by the tarnishedplant-bug. INJURIOUS TO CARROT AND RELATED CROPS 195
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1918
