The black fly of citrus and other subtropical plants . eral instances in the outlying parts of the Las Sabanas regionvarious kinds of citrus that were well cared for, but received wateronly at long intervals or not at all, were found to be in a badly wiltedcondition, but examination showed them to be entirely free fromwoglumi. Such trees, however, seemed able to resist the droughtmuch better than infested ones and did not lose as large a percentageof leaves. On the other hand, trees in the same region and likewiseuninfested but neglected in every way were found to be decidedlydwarfed in size a
The black fly of citrus and other subtropical plants . eral instances in the outlying parts of the Las Sabanas regionvarious kinds of citrus that were well cared for, but received wateronly at long intervals or not at all, were found to be in a badly wiltedcondition, but examination showed them to be entirely free fromwoglumi. Such trees, however, seemed able to resist the droughtmuch better than infested ones and did not lose as large a percentageof leaves. On the other hand, trees in the same region and likewiseuninfested but neglected in every way were found to be decidedlydwarfed in size and many were dead and dying. These same condi-tions were verified in the Canal Zone. In the village of Taboga on the island of that name, lime treesgrowing under very adverse conditions and heavily infested showedsome injury but not as much as might have been expected. At Frijoles and Corozal dead and dying lime trees were the first place neither scale insects nor the black fly were present, Bui. 885, U. S. Dept. of Agriculture. Plate !, % *. Bui. 885, U. S. Dept. of Agriculture. Plate II.
Size: 1318px × 1896px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookidblackflyofci, bookyear1920
