File:The Sugar-Cane Insects of Hawaii (1911) (14778286585).jpg

Identifier: sugarcane00unit (find matches)
Title: The Sugar-Cane Insects of Hawaii
Year: 1911 (1910s)
Authors: United States.: Bureau of Entomology
Subjects: Sugarcane www.flickr.com/photos/internetarchivebookimages/tags/book...
Publisher: Washington, D.C. : U.S. Dept. of Agriculture, Bureau of Entomology
Contributing Library: University of Florida, George A. Smathers Libraries
Digitizing Sponsor: University of Florida, George A. Smathers Libraries with support from LYRASIS and the Sloan Foundation

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ed tothe surface, they are at once active and scatter over the plant tofeed, congregating at first down within the sheaths of the upperleaves. In a few hours the body becomes shortened and the outercovering, on exposure to the air, becomes darker in color. The habitof the very young in secluding themselves within the lower sheathsof the leaves renders them quite inconspicuous unless especiallysought for. They may become very abundant and still remain unde-tected by an ordinary observer until the result of their feedingbecomes apparent. (See nymphs, Plate II, figs. 3-6.) Ordinarily when disturbed the adult leafhopper does not fly butmoves off in an odd, sidewise fashion to another part of the leaf, orsprings suddenly to another portion of the plant. (See adults,Plate II, fig. 7, and text fig. 1.) ° Eckart, C. F.—Report of the Hawaiian Sugar Planters Association ExperimentStation for 1903, Honolulu, 1904, pp. 78-79. Bui. 93, Bureau of Entomology, U. S. Dept. of Agriculture. Plate II.
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The Suqar-Cane Leafhopper (Perkinsiella saccharicida). Fig. 1.—Egg chambers in midrib of cane leaf, slightly enlarged. Fig. 2.—Eggs, greatly enlarged.Fig. 3.—First-stage nymph. Fig. ■!.—Second-stage nymph. Fig. 5.—Third-stage nymph. Fig. 6.—Fourth-stage nymph. Fig. 7.—Adult male. (After Kirkaldy.) THE SUGAR-CANE LEAFHOPPER. 17 SYMPTOMS OF LEAFHOPPER INJURY. The presence of the pest on the plantations was noticed first bythe appearance of a sooty black covering on the lower leaves of thecane plant. This black covering became known as smut. It is afungous growth and finds a medium for development in the trans-parent, sticky fluid secreted by the leaf hoppers during their feedingon the plant. This secretion is commonly known as honeydew. The black smut or fungous growth in the honeydew secretion ofthe leafhopper and the red discoloration about the openings to theegs; chambers in the midribs of the leaves are the most pronouncedsvmptoms of the work of theleafhopper on cane

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