. Garden and forest; a journal of horticulture, landscape art and forestry. doubt of this, provided the copper is destruc-tive only to these lower plants, the fungi, and that it is notharmful to the vitality of our cultivated plants. But these copper salts, sprayed on vegetation, are finallydeposited on and in the soil beneath, and they may there beinimical to the germination of our planted seeds and to theprosperity of plants which spring from them. These are gravepossibilities, made seriously plausible by experiences had inmy recent practice. When under the direction of the United October 21
. Garden and forest; a journal of horticulture, landscape art and forestry. doubt of this, provided the copper is destruc-tive only to these lower plants, the fungi, and that it is notharmful to the vitality of our cultivated plants. But these copper salts, sprayed on vegetation, are finallydeposited on and in the soil beneath, and they may there beinimical to the germination of our planted seeds and to theprosperity of plants which spring from them. These are gravepossibilities, made seriously plausible by experiences had inmy recent practice. When under the direction of the United October 21, i8;i. Garden and Forest. 499 States Department of Agriculture I began experiments withthe copper compounds, I naturally did not confine the treat-ment to the Vine exclusively. With the view of preventingCorn ergot (Ustilago Maydis) I soaked for four hours a portion (sulphate of iron). On the plat treated with Bordeaux mixture,the seed generally failed to germinate ; on the other plats, theseed grew in usual health. The next year I made the experiment of spraying sundry. Fig. 78.—A Seedling California Almond.—See page 495. of my seed-corn in the Bordeaux mixture, and then planted itin a plat in the field by the side of other plats seeded with cornnot thus treated, and in comparison with a plat planted withcorn-seed soaked for eight hours in a solution of copperas plats of Peachblow Potatoes, to prevent blight and rot. Thiswas successful, as reported in one of the department sprayed plats gave a good crop ; the unsprayed platswere all the victims of the fungus {Phytopthora infestans), dead 5oo Garden and Forest. [Number 191. and dried up six weeks before the others, and giving practi-cally no crop. This potato-patch was subsequently plantedagain to Peachblows. When the tubers sprouted I saw thatgrowth on the plat which had not been sprayed was earlierand more vigorous than on the plats which were sprayed theprevious season. The next year this patch was again p
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