The black fly of citrus and other subtropical plants . The Black Fly. Celluloid cages in which adults were confined in order to obtain egg spirals for observation. I Bui. 885, U. S. Dept. of Agricultm Plate VI! lyHli % *\ ? L/ » l»^.^ a f - k.! 3* A ^^ *b*~fii ^ \% % •»^«w. »** . -**„?** »^ 4 ,# / *? ^ ? f «te & *J i* j ^ ; 1 ? *** * f *»• ^ * i t „# L^ Si. Stages in the Life History of the Black Fly. A, Eggs and first and second instar larvae; B, eggs and third instar larvae; C, male pupae;D, female pupae. All enlarged to the same scale (taken with 48 mm. lens). THE BLACK FLY OF CITRUS. 21 bu
The black fly of citrus and other subtropical plants . The Black Fly. Celluloid cages in which adults were confined in order to obtain egg spirals for observation. I Bui. 885, U. S. Dept. of Agricultm Plate VI! lyHli % *\ ? L/ » l»^.^ a f - k.! 3* A ^^ *b*~fii ^ \% % •»^«w. »** . -**„?** »^ 4 ,# / *? ^ ? f «te & *J i* j ^ ; 1 ? *** * f *»• ^ * i t „# L^ Si. Stages in the Life History of the Black Fly. A, Eggs and first and second instar larvae; B, eggs and third instar larvae; C, male pupae;D, female pupae. All enlarged to the same scale (taken with 48 mm. lens). THE BLACK FLY OF CITRUS. 21 but the injury seemed to be due to neglect and to the fungus (Gloeo-sporium gloeosporoides), which had gained entrance to the treesthrough pruning wounds. At Corozal the injury seemed to bedue to heavy infestations of the purple scale (Lepidosaphes beckiiNewm.), and of the West Indian red scale [Pseudaonidia (Selenaspi-dus) articulatus Morg.]. These dying lime trees were not heavilyinfested with A. woglumi. In the authors work at Ancon, Balboa, and Cristobal, it was foundthat when citrus trees (lime, orange, and grapefruit) were heavily in-fested with the two scales mentioned above, they were almost invaria-bly only lightly infested with A. woglumi even though they were in closeproximity to trees heavily infested with this insect. From the authorsexpe
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Keywords: ., bookcentury1900, bookdecade1920, bookidblackflyofci, bookyear1920
