. Citrus fruits;. Citrus fruit industry; Citrus fruit industry. Diseases and their Control 37' This showed that mot- tled-leaf is not trans- mitted by budding. In 1910 R. R. Snow- den * advanced the theory that mottled- leaf was due to an ex- cess of magnesia or an improper ratio be- tween magnesia and lime in the soil. Snowden showed that the soils of some healthy groves aver- aged about parts of lime to 1 of mag- nesia, while the soils from sickly groves averaged of lime to 1 of magnesia. This theory was much dis- cussed at the time, but subsequent study brought to light so many exc
. Citrus fruits;. Citrus fruit industry; Citrus fruit industry. Diseases and their Control 37' This showed that mot- tled-leaf is not trans- mitted by budding. In 1910 R. R. Snow- den * advanced the theory that mottled- leaf was due to an ex- cess of magnesia or an improper ratio be- tween magnesia and lime in the soil. Snowden showed that the soils of some healthy groves aver- aged about parts of lime to 1 of mag- nesia, while the soils from sickly groves averaged of lime to 1 of magnesia. This theory was much dis- cussed at the time, but subsequent study brought to light so many exceptions to the supposed rule that the theory was greatly weakened. Heavy ap- plications of lime moreover have by no means proved a cure for the Fig. 132. — Advanced stage of mottled- leaf disease showing formation of mul- tiple buds. 1 California Cultivator, Aug. 11, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Coit, John Eliot, 1880- [from old catalog]. New York, The Macmillan company
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
