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Page 86 · DO #455 · 204_Popenoe_Bx33FF25r
- Collection
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Wilson Popenoe (1892–1975) family papers
- Item/Folder
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The Citrus Fruits - Spanish & English manuscripts - chapter in outline for proposed book with Herbert Wolfe, n.d.
- Digital Object
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DO #455,
page 86
- Collection-level dates
- 1882–1975
Page transcription
10.
Troyer-- is being used to a certain extent. It is outstanding in resistance to footrot and cold, and in production of vigorous, high-yielding trees if the scions are free from exocortis virus. It merits testing widely in tropical America, although its cold-hardiness is of value only in the subtropics.
Propagation
In commercial nurseries, citrus trees are almost always propagated by budding(bud-grafting), the common shield- or T-bud, generally being used. Grafting (scion-grafting) is successful but much slower and more troublesome to perform and is used only in topworking old trees. Even in such cases, it is usually best to cut back large limbs and bud the sprouts, rather than to graft directly into the cut limbs.
Budsticks should be of well-rounded, well-matured wood, of next to the last flush of growth. It is highly important that the budwood be free of virus infection.
Seedling stocks are usually grown in two stages. First, fresh, plump seeds are sown thickly in a seedbed where they can be watered as needed and protected from ants. When the seedlings are about 1/4 inch in diameter at the base, they are transplanted into the nursery where they are spaced 1 ft. apart in rows 3 ft. apart. Most of the seedlings will be similar in size; those markedly larger or smaller should be discarded. In both seedbed and nursery row, the seedlings should be kept growing vigorously by light applications of well-balanced fertilizer and by irrigation where necessary. When the seedlings are about 1/2 inch in diameter, they should be budded.
As soon as it is certain that the buds have united well with the stocks, the latter should be "lopped" that is, cut nearly through a few inches above the buds, and the tops bent over to the ground.