. The Canadian horticulturist [monthly], 1901. Gardening; Canadian periodicals. Fig. 2037. numbers. Shall we count the spores to be found on a piece of asparagus stalk not more than three inches long as presented in Fig. 2035 ^"'^ interpreted by Fig. 2037, and tell how many they be ? Such is the host with which we have to contend now on the war path : infinitesimal in size, infinite in num- ber, "horsed upon the sightless couriers of the air" it comes as destructive, if not as " terrible as an army w'ith banners," and we are powerless to stay its coming. Spraying with
. The Canadian horticulturist [monthly], 1901. Gardening; Canadian periodicals. Fig. 2037. numbers. Shall we count the spores to be found on a piece of asparagus stalk not more than three inches long as presented in Fig. 2035 ^"'^ interpreted by Fig. 2037, and tell how many they be ? Such is the host with which we have to contend now on the war path : infinitesimal in size, infinite in num- ber, "horsed upon the sightless couriers of the air" it comes as destructive, if not as " terrible as an army w'ith banners," and we are powerless to stay its coming. Spraying with fungicides is in this instance of doubt- ful utility, for such is the foliage and smooth- ness of the epidermis of asparagus that it is well nigh impossible for the fungicide to effect a lodgement. Nevertheless we should be able to stamp out the enemy by united action of asparagus growers in cutting off at the ground every afi^ected stalk, as soon as, by its change of color it is shown to be no longer of service to the plant, and burning them forthwith ; for, if the teleutospores are destroyed before they are dislodged from the stocks where they are formed, then there can be no sporidia in the spring to breed Rust. The importance of united action should be apparent to all, and the import- ance of burning the teleutospores while yet in the stalk will be seen when it is under- stood that the teleutospores produce sporidia without reference to any particular place, but do so wherever they chance to be if only there be the requisite atmospheric conditions. The writer desires to acknowledge his in- debtedness to Professor Byron D. Halsted, of the New Jersey Experiment Station, whose valuable paper on the Rusts of Horti- cultural Plants has been largely drawn upon, as published in the Transactions of the Massachusetts Horticultural Society for 1900, and the accompanying figures copied to illustrate this paper. D. W. Beadle. 207 Givens Street, Fig. Please note that th
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