. Cooperative economic insect report. Beneficial insects; Insect pests. 542 - two inches of the soil. The adults of the new generation emerge in one to three weeks, depending on the local and seasonal conditions. The larvae hibernate in £ cocoon in the soil and pupate in the spring. Description: EGG - ram. by 0,08 mm., with a pedicel measuring mm. LARVA - Pale yellow, legless, with power of jvunping. A spatula or breast bone is present. Length mm. ADULT - Male: Head - eyes black, broader at top, contiguous, lower part of face, proboscis and palpi whitish; antennae mm. long,
. Cooperative economic insect report. Beneficial insects; Insect pests. 542 - two inches of the soil. The adults of the new generation emerge in one to three weeks, depending on the local and seasonal conditions. The larvae hibernate in £ cocoon in the soil and pupate in the spring. Description: EGG - ram. by 0,08 mm., with a pedicel measuring mm. LARVA - Pale yellow, legless, with power of jvunping. A spatula or breast bone is present. Length mm. ADULT - Male: Head - eyes black, broader at top, contiguous, lower part of face, proboscis and palpi whitish; antennae mm. long, 2+12, the segments simple with one whorl, first flagellar segment with- out stem, the succeeding segments globular with two whorls. Neck yellow, pro- thorax and scutellum slate gray, on the latter are two shiny black furrows, running lengthwise, in which are two rows of gray hairs; between the first and second coxa is an oblique patch which stretches sideways as far as the humerus. Wings mm. in length, strongly iridescent, long and wedge-shaped at the base. Abdomen lemon-yellow, with some indistinct transverse stripes. Female: Antennae mm. long, 2+12, the first flagellar segment is constricted in the middle and is twice the length of the succeeding ones, which are cylindrical with short stems; ovipositor whitish and capable of considerable extrusion, it is pointed like a needle. Length mm. (Prepared in Survey and Detection Operations in cooperation with other ARS agencies). CEIR 12(21):5-2 Contarinia nasturtii (Kieffer) Adults. A, Male; B, Female Major references: 1. Barnes, H, F. 1946. Gall Midges of Economic Importance. Vol. 1, 104 pp., London. 2. Smith, K. M, 1948. A Textbook of Agricultural Entomology. 289 pp., Cambridge. Figures (except map) from: Taylor, T. H. 1912. Cabbage-top in Swedes. Univ. Leads & York. Counc. Agr. Educ. No. 82, 21 Please note that these images are extracted from scanned page images that may have been digitally enhanced
Size: 1888px × 1324px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjectbeneficialinsects, booksubjectinsect
