. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE GKAIN BUG. 73 visable to allow mesquite to grow in the vicinity of cotton when it can be avoided. Observations thus far on the feeding habits of the con- chuela have given us no reason to expect that a trap crop can ever be successfully used to divert the attention of the insect from the cotton after the bolls become suitable for food. Under date of May 29, 1906, Mr. J. H. Vaughan, of Tlahuahlo, Mexico, in a communication to the writer stated that the conchuela had already appeared on alfalfa. This directs at
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. THE GKAIN BUG. 73 visable to allow mesquite to grow in the vicinity of cotton when it can be avoided. Observations thus far on the feeding habits of the con- chuela have given us no reason to expect that a trap crop can ever be successfully used to divert the attention of the insect from the cotton after the bolls become suitable for food. Under date of May 29, 1906, Mr. J. H. Vaughan, of Tlahuahlo, Mexico, in a communication to the writer stated that the conchuela had already appeared on alfalfa. This directs attention to the advis- ability of giving close attention to this crop and of taking advantage of its attractiveness as a breeding place for the conchuela early in the season, to check its increase through means that have been suggested. The adult con- chuela evidently never flies except during dayhght. Many Penta- tomids are com- monly attracted to lights, but nor- mally this species feeds almost con- tinually at night, and in the labora- tory either re- mains motion- less, if not feed- fig. ii. ing, or, if feeding, continues uninterruptedly when an electric light is brought within a few feet of a cage in which specimens are -The grain bug: Nymph, fifth instar. (Original.) Enlarged 6 diameters. THE GRAIN BUG. (Pentatoma sayi Stal.) At Tlahualilo, Durango, Mexico, the grain bug (figs. 10, 11) has been observed to be of frequent occurrence on cotton and to resemble the conchuela in its habits, life history, and seasonal history. At Barstow, Tex., where grain crops were accessible, no specimens were collected on cotton.^ The preference of this species for the seed of grains and of alfalfa will probably be sufficient protection against its occurring in injurious abundance in cotton fields in this country. « Bui. 64, Pt. I, Bur. Ent., U. S. Dept. Agr., p. 2, Please note that these images are extracted from scanned page images that may have been digitally enhanced f
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