The black fly of citrus and other subtropical plants . Fig. I.—Infested Lime Leaves, Showing Various Stages of Development of Infestation. These leaves were taken from trees shown in figure <! Fig. 2.—Young Lime Trees Moderately Infested that were Kept UnderDaily Observation for Over a Year. Photographed in October, 1918. THE BLACK FLY. Bui. 885, U. S. Dept. of Agriculture. PLATE III.

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Keywords: ., bookcentury1900, bookdecade1920, bookidblackflyofci, bookyear1920