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File:Bulletin of the U.S. Department of Agriculture (1920) (14778766541).jpg

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Identifier: bulletinofusdep601625unit (find matches)
Title: Bulletin of the U.S. Department of Agriculture
Year: 1913 (1910s)
Authors: United States. Dept. of Agriculture
Subjects: Agriculture Agriculture
Publisher: (Washington, D.C.?) : The Dept. : Supt. of Docs., G.P.O.
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: American Museum of Natural History Library

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been found on the trees they had deserted. The citrus thrips usually takes a rapid spiral or zigzag course inshort-distance flights, but in extended flights the course is more direct.The flight somewhat resembles that of katydids and grasshoppers.By mounting in a strong wind the thrips undoubtedly would fly amile or possibly more. FOOD PLANTS. Although the citrus thrips thrives best and reaches its maximumabundance on plants of the citrus group, it feeds continuously oroccasionally on plants widely separated botanically from the citrusgroup. In Table I the food plants are arranged according to theextent of infestation as nearly as possible in the order of their im-portance as food for thrips. There is very little difference, however,in the extent to which the different plants in Group III are infested,and certain plants in Group II are infested almost as badly as anyof the citrus fruits of Group I. It will be noted in Table I that the Bui. 61 6, U. S. Dept. of Agriculture. Plate III.
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Damage to Citrus and Grapes by the Citrus Thrips. Fig. 1.—Lemons injured by the citrus thrips. Fig. 2.—Pomegranates injured by the citrusthrips. Fig. 3.—Grapes scarred by the citrus thrips. (Original.) THE CITRUS THKIPS. 9 range of food plants is wide and includes practically all the citrusfruits grown in California, certain deciduous fruits and nuts, a fewornamentals, and several noncultivated plants. Table I.—Food plants of the citrus thrips in order of importance. Group I, generally infested. Group II, occasionally infested. Group III, rarely infested. 1. Sweet oranges. 6. Pomegranate (Punka granatum). 11. Peach. 2. Mandarin orange (Citrus 7. Grape. 12. Plum. nobilis). 8. California pepper tree (Schinus 13. Pear. 3. Pomelo, or grapefruit. molle). 14. Raspberry. 4. Lime andlemon. 9. Chinese umbrella tree (Melia 15. Pecan. 5. Kumquat( Citrus japonica). azedarach umbraculifera). 16. Walnut. 10. Apricot. 17. Olive. 18. Rhubarb. 19. Dock (Rumex sp.). 20. Purslane (Portulacaolcra

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https://www.flickr.com/photos/internetarchivebookimages/14778766541/

Author Internet Archive Book Images
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Volume
InfoField
1920
Flickr tags
InfoField
  • bookid:bulletinofusdep601625unit
  • bookyear:1913
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:United_States__Dept__of_Agriculture
  • booksubject:Agriculture
  • bookpublisher:_Washington__D_C______The_Dept____Supt__of_Docs___G_P_O_
  • bookcontributor:American_Museum_of_Natural_History_Library
  • booksponsor:American_Museum_of_Natural_History_Library
  • bookleafnumber:526
  • bookcollection:americanmuseumnaturalhistory
  • bookcollection:biodiversity
  • bookcollection:americana
  • BHL Collection
  • BHL Consortium
Flickr posted date
InfoField
30 July 2014


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