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Page 26 · DO #459 · 204_Popenoe_Bx33FF29r
- Collection
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Wilson Popenoe (1892–1975) family papers
- Item/Folder
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Preface, Introduction, and The Mango - manuscript and notes (typed and handwritten) - chapters in outline for proposed book with Herbert Wolfe, n.d.
- Digital Object
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DO #459,
page 26
- Collection-level dates
- 1882–1975
Page transcription
Propagation
Cultivated varieties are usually monoembryonic and their seedlings are very variable, so that vegetative methods of propagation must be used. Marocotage has been used occasionally, with a success differing with variety, but budding or grafting are the commonly used methods of multiplication.
Any vigorous seedling is satisfactory as a stock. The heek should be removed before the seed is planted, as this permits discarding diseased or insect-infested seeds as well as expediting germination. Seeds remain viable only a few weeks, hence they should be planted promptly after removal from the fruit. It is well to put them in peat moss or sawdust to germinate, and to plant the sprouted seeds in pots or in the nursery rows.
Several types of grafting are in use. Veneer-grafting is very popular, using stocks 1 yr. old in containers or 2 yrs. old in field rows. Scions are the terminal 3 x 4 in. of twigs with the terminal bud swollen but not yet pushing out. This condition can be induced usually by removing the leaves, but leaving the petiole stubs, near the tip of the twig about 2 weeks before a scion is to be cut. Veneer-grafting can be done whenever stocks are in an active flush of growth, and stocks should be in active growth when grafted. When the graft has united, after a few weeks, the top half of the stock should be cut off to stimulate growth of the scion; and after another month the stock is cut back to the graft union.
A form of veneer-grafting in which the scion consists only of a single bud is known as "chip-budding." Stocks are ready for use at 5 weeks, when the bark color has changed from red to green. Buds are cut like shield buds except that the chip is thickest at the base. Lateral buds are used and are induced to start swelling by removing the terminal and several subterminal buds about 10 days before grafting in the usual way for a veneer-graft. Several weeks later the stock is cut back to the union to force the scion bud into growth. Another form of grafting with a single-bud scion, the "modified chip-bud" method, is really a side-graft. The stocks are used at 2 or 3 weeks of age, while still firm and succulent, and buds are pre-conditioned as above. The scion is a shield bud about 2 in. long and is inserted in a side cleft. About 10 days after grafting the stock is cut off just above the union. In both types of "chip-budding," the graft is