English

Scale insects and mites on citrus trees

43 pages : 23 cm · Cover title · "Somewhat condensed revision of the article under the same title published in the Yearbook of this Department for 1900." · Introduction. pp. 5 -- Influence of cultivation, pruning and climate. pp. 6 -- Periodicity in scale insects. pp. 6 -- Nature of the injury occasioned by scale insects. pp. 7 -- The natural enemies of the citrus scale insects. pp. 8 -- The direct means of controlling citrus scale insects. pp. 9 -- The gas treatment. pp. 9 -- Sprays for citrus trees. pp. 15 -- Citrus scale insects: Classification and characteristics. pp. 18 -- Group 1. The armored scales. pp. 19 -- The long scale. pp. 21 -- The purple scale. pp. 22 -- The red scale of Florida. pp. 23 -- The red scale of California. pp. 24 -- The oleander scale. pp. 25 -- The chaff scale. pp. 25 -- The orange Chionaspis. pp. 26 -- Group 2. The unarmored scales. pp. 26 -- The black scale. pp. 27 -- The soft scale. pp. 30 -- The hemispherical scale. pp. 31 -- The Florida wax scale. pp. 31 -- The barnacle scale. pp. 32 -- The fluted scale. pp. 32 -- The mealy bug. pp. 36 -- Important citrus pests other than scale insects. pp. 36 -- The white fly. pp. 36 -- The rust mite of the orange

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