The mosaic disease of sugar cane and other grasses . plowed a precautionary measure, some crop other than a grass shouldbe grown on the land for one year, after which cane may again begrown with safety. The two small infested areas iii Alabama and 1 In so far as it applies to the regions Indicated, we concur in this suggestion by Mr. Wilmon Newell,Plant Commissioner of Florida. 24 BULLETIlSr 829, U. S, DEPARTMENT OF AGPJCULTUEE. Mssissippi offer no diiE-culty at all. They can be destroyed withpractically no loss to the owners, and the assurance of healthy cropsin the future more than off
The mosaic disease of sugar cane and other grasses . plowed a precautionary measure, some crop other than a grass shouldbe grown on the land for one year, after which cane may again begrown with safety. The two small infested areas iii Alabama and 1 In so far as it applies to the regions Indicated, we concur in this suggestion by Mr. Wilmon Newell,Plant Commissioner of Florida. 24 BULLETIlSr 829, U. S, DEPARTMENT OF AGPJCULTUEE. Mssissippi offer no diiE-culty at all. They can be destroyed withpractically no loss to the owners, and the assurance of healthy cropsin the future more than offsets the inconvenience of growing someother crop on the land now occupied by infected cane. The successof the measure in Florida is made possible by the present organizationof the State plant board, which has already met the test of success-fully handling more serious problems. ELIMINATION BY PLANTING IMMUNE VARIETIES. Success of the control measures suggested up to the present dependsentirely upon the whole-hearted cooperation of all cane Fig. 4.—Map of Florida, sho^^•ing the location of diseased areas of sugar cane in that State. There yet remains a method, applicable only to certain regions, bywhich a planter can make himself wholly independent of any defaulton the part of his neighbors. A few varieties of sugar cane have beendiscovered that are absolutely immune to mosaic under all condi-tions. Most of them are of the type referred to as Japanese origin is obscure. They have certain characteristics in com-mon. All are tall growing with slender stalks. They stool abund-antly, ratoon well, and produce an enormous tonnage. The sucrosecontent is not so high as in some of the broad-leaved canes, but insugar per acre they take first rank with the best existing Kavangire, Zwinga, Uba, Cayana 10, and numerous othersimported by the office of Foreign Seed and Plant Introduction are MOSAIC OF SUGAR CAI^E AND OTHER GRASSES. 25 included among these
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