ON p. 331 of NATURE of December 28, 1916, the writer of the review of the book entitled “Plants in Health and Disease” remarks:—“The accounts of such pests as the cabbage-root fly and the onion fly, ...
THE control of carrot fly by the application of insecticides direct to the plant rows has shown interesting anomalies when compared with that of root flies of somewhat similar habits. Calomel, for ...
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