Papers on the cotton boll weevil and related and associated insects . flowers of the host plant. The weevils normally feed on the anthers and on the surface of thepetals. They refused to touch the foliage. When offered a choice ofCallirrhoe or cotton blooms, they almost invariably went directly tothe former. When given cotton alone they were observed to feed onthe pollen and petals and in one case indication of feeding on the squarewas observed. In habit the weevil is like Anthonomus grandis. It is susceptibleto movement and when conscious of a disturbance remains alert on theedge of a petal.
Papers on the cotton boll weevil and related and associated insects . flowers of the host plant. The weevils normally feed on the anthers and on the surface of thepetals. They refused to touch the foliage. When offered a choice ofCallirrhoe or cotton blooms, they almost invariably went directly tothe former. When given cotton alone they were observed to feed onthe pollen and petals and in one case indication of feeding on the squarewas observed. In habit the weevil is like Anthonomus grandis. It is susceptibleto movement and when conscious of a disturbance remains alert on theedge of a petal. A slight movement will cause it to drop to theground, where it is almost impossible to find it. It is a very readyflyer and goes from plant to plant in this manner. ANTHONOMUS SQUAMOSUS Lee. This species was found breeding in very large numbers by Mr. C. and the writer on Grindelia squarrosa nuda at Clarendon, has previously been recorded from the same plant in Colorado and Bui. 63, Part II, Bureau of Entomology, U. S. Depi. of Agriculture. Plate Work of Lixus musculus and Orthoris crotchii. Fig. 1.—Gall of Lixus miisrirfus and exit hole of adult on stem of Polygonum 2.—Gall of mtiscuhis and entrance hole (closed) of pyralid caterpillar on stem ofPolygonum. Fig. 3.—Pod of Maitzdui iuhIh, showing two egg punctures of Orthoris ! 4.—Pod of Mentzelia opened, showing a cluster of Orthoris crotchii cells, and the cocoonsof Tetrastichus. Figs. 5, 6.—Interior of pod of same, showing several cells of Orthoris 7.—An isolated cell of Orthoris crotchii, showing the manner in which the seeds areeaten. (Original.) NOTES ON THE BIOLOGY OF RELATED WEEVILS. 43 what was supposedly the same species from Helianthus in Kansas. Itoviposits in the bud or flower at the base thru the involucre. Thepresence of the weevil is indicated by the blackening of the two orthree punctured involucral bracts. The larva feeds among
Size: 1270px × 1967px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorunitedstatesbureauofe, bookcentury1900, bookdecade1900
