. Bulletin of the Department of Agriculture. Agriculture; Agriculture. DEPAETMENT BULLETIN 779. The insect is found at varying altitudes ranging from 9,300 feet at Silverton, Colo., to below sea level in the Imperial Valley of California. FOOD PLANTS. The nymphs and adults of C. sayi have been observed to feed upon the fruit and seeds of a wide range of cultivated plants, including wheat, barley, rye, oats, winter emmer, spelt, milo maize, kafir corn, feterita, al- falfa, Sudan grass, cotton, buckwheat, peas, beans, cabbage, tomato, and lettuce. Among the native food plants of the species
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. DEPAETMENT BULLETIN 779. The insect is found at varying altitudes ranging from 9,300 feet at Silverton, Colo., to below sea level in the Imperial Valley of California. FOOD PLANTS. The nymphs and adults of C. sayi have been observed to feed upon the fruit and seeds of a wide range of cultivated plants, including wheat, barley, rye, oats, winter emmer, spelt, milo maize, kafir corn, feterita, al- falfa, Sudan grass, cotton, buckwheat, peas, beans, cabbage, tomato, and lettuce. Among the native food plants of the species are Russian thistle {Salsola tragus L.), mallow {Malva parviflora L.), pig- weed {Amaranihus spp.), wild oats (Stipa spp.), lamb's- quarters (Chenopo- dium spp.), sheep- weed {Gutie7'rezia spp.), and a species of the honeysuckle {Lonicera involucrata Banks). Wheat, barley, and rye appear to suffer more from the depredations of C. sayi than do any of its other cultivated food plants. CHARACTER OF INJURY. EXTERNAL APPEARANCE OF INJURED PLANTS. The heads of small grains that have been injured by C. sayi are conspicuous in the field, especially those of wheat, barley, rye, and oats. Soon after attack, and long before the normal period of ripen- ing is reached, the damaged heads assume a dull yellowish-white €olor and in this condition are in sharp contrast to the bright green of the undamaged heads. They appear normal in size with the ex-. FiG. 2.—Characteristic damage to wheat heads by the grain bug. Note the awns standing at an obtuse angle from the normal. The head is dead and yellow; the stem is alive and 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 United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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