An agricultural correspondent writes to a contemporary,:-—Rust was the subject of some remarks m my last letter,: and the topic again crops vp t in connection flrith some remarkable differences m the susceptibility of different varieties of wheat to rust noticed m a visit to Messrs Carter's (of London) Nurseries, at Fbrest Hill, tqe other day. They have, as usual, their crossbred wheats growing side by side, nnd with them a great number of Varieties from nearly every country m the world m which, wlleafc is grown. There is only ono row of each kind m a place, though comparisons are m some Cases made between one variety and several other sorts, by growing them side bypide. All sown the same day and treated; precisely alike, yet the visitor finds one? row badly rusted, and the next with no I rust on it at all, or only a little. JThis is remarkable, because the two varieties touch each other as they wave m the ■wind, and, indeed, often have to be pkted by the hand to separate them. ! The rust is that of the spring fungus, Piiccivica rubigo vera, and not that of the later sort which develops intq our common mildew (Puccivkagrassinis).: The former seldom does much harm m this country, where it is chiefly confined to the flag. .Still it cannot fail to sap the vitality of the plant to a considerable extent, and perhaps the only reason iwhy it is comparatively harmless here is that we grow hd great a bulk of straw* and often * crop will bear a little lightening. I noticed that Australian and New Zealand wheats, as a rule, were badly affected, as were all other sorts from countries where the summer temperature is high. One New Zealand sort, however, labelled "New Zealand Hard," had Very little rust upon it. The only varieties that | seemed to be quite free from rust were two of. Messrs Carter's new crossbred wheat* and two .foreign sorts. These were the cross between April and Golden Grain, the cross between April and Talavera, Ble Bordien, and an unnamed sample from TlaJy. In addition, three selections from Messrs Carter's cross between Talavera and Fillmeasure had no rust m them, while on 6wo other selections from the same cross there was Hardly a trace. Similarly, four selections of the cross between Tal&yor* and Bird-proof were free from. rust, while two other 6ele<s--sions, w- ere nearly free. Perhaps I should explain that the several selections are those of the offspring of the crosses which show variations. Several selections of some crosses are grown, to see which i» the best. One of the favourite Canadian varieties, Red Fyfe, had w^ely, nny rust on ib, and the «ayii<* way be said of the American lsijw*ukce, Oregon, and the goofl qW Hivefcta. The cross between A.prfyand Golden Grain (both bearded,, the latter being an American wheat) & probably the earliest spring wheat m cultivation. It is greatly superior m size of car and gencrs^ robustness to April wheat, hitlj^via the best sort to sow late m tb* spring, or, indeed, after February. The progeny of April and Talavera is nearly as early. It is remarkable th£t all the several crosses which ha^e, "falarora for one parent are fjpc# ot nearly free frprn rust, . ..; ;
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Rust-Proof Wheats., Ashburton Guardian, Volume VII, Issue 2548, 20 October 1890
Rust-Proof Wheats. Ashburton Guardian, Volume VII, Issue 2548, 20 October 1890
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