. Manual of vegetable-garden insects. five nymphal stages. The nymphs are gayly colored with green, red and various shades of brown (Fig. 125) and are found abundantly throughout the growing season. Reference Cornell Agr. Exp. Sta. Bull. 346. 1914. The Negro-Bug Thyreocoris pulicarius Germar A serious outbreak of this small black stink-bug occurred inthe celery fields of Michigan in 1893, causing a loss of manythousand dollars. A similar outbreak took place in northern Ohio in 1906. It is surprising thatattacks of this kind have not beenmore frequent, since the bugs areoften abundant on their
. Manual of vegetable-garden insects. five nymphal stages. The nymphs are gayly colored with green, red and various shades of brown (Fig. 125) and are found abundantly throughout the growing season. Reference Cornell Agr. Exp. Sta. Bull. 346. 1914. The Negro-Bug Thyreocoris pulicarius Germar A serious outbreak of this small black stink-bug occurred inthe celery fields of Michigan in 1893, causing a loss of manythousand dollars. A similar outbreak took place in northern Ohio in 1906. It is surprising thatattacks of this kind have not beenmore frequent, since the bugs areoften abundant on their wild foodplants over large areas every insect ranges throughout theUnited States and Canada east ofthe Rocky Mountains southward toFlorida and Arizona. The adult(Fig. 126) is about ^ inch in length,shining black, strongly convex, shortand broad, widest on the thoraxThe scutellum is greatly developedand covers the abdomen; the exposed edge of the wingis yellowish insect hibernates in the adult condition and the bugs. Fig. 126. — The negro-bug,adult (X 14). and rounded behind. INJURIOUS TO CARROT AND RELATED CROPS 197 appear on their food plants in the spring. In IlHnois the eggsare laid in May and June. They are deposited singly on theleaves. The egg is :^ inch in length, elongate, shining, lightorange when first laid but deepening to bright red just beforehatching. The egg has been observed to hatch in sixteendays. The older nymph is similar to the adult but has theabdomen blood-red. The nymphs become mature in July andthe adults, after feeding for a few weeks, go into hibernationrather early. The insect breeds abundantly on various weeds,including beggar-ticks, tick-seed, red-root, ground-nut, greatlobelia and neckweed (Veronica peregrinaf). It has also beenfound injurious to corn, wheat and grass and the bugs oftengive an unpleasant flavor to raspberries and is only one brood developed annually. The injury to celery has been caused almo
Size: 1532px × 1630px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1918
