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mise à jour le : 11-05-2020
Urbana Forcing OP
Fruit rose rond. Croisement de "Grand Rapids Forcing" et de "Marglobe"
Obtention probable vers 1932.
Variété citée en 1936 dans l'étude "New Wilt-Resistant Tomato varieties for field and greenhouse
Auteur :W. A. Huelsen de l'Université de l'Illinois. College of Agriculture. Agricultural experiment station and service in agriculture and home economic.
Origin. A cross between Grand Rapids Forcing and Marglobe, now in the fourteenth generation from the cross. Mentioned in Illinois Station Bulletin 361 under its cross number 1001. Vine type. Takes about 5 to 7 days longer than Blair Forcing or Lloyd Forcing to reach the topping stage. The leaves are more finely cut than Blair Forcing or Lloyd Forcing and are dark green. The set is lighter than Blair Forcing or Sureset Forcing, averaging three fruits per cluster in the fall and four in the spring. Marglobe averages one plus and 2 per cluster, respectively. Fruits. Pink, practically globe-shaped, and resemble the Globe variety. Very thick rind; seed cells vary from four to six. Under adverse conditions the fruits are inclined to be angular and air pockets appear, a tendency observable in all globe-shaped types. The uniform color and the smoothness of the fruit give Urbana Forcing an exceptionally attractive appearance. Yields. Tho Urbana Forcing usually produces fewer fruits than the four other new greenhouse varieties, these fruits are generally heavier, so that Urbana Forcing is by no means the lowest yielder in the group. Use. Urbana Forcing is suitable for the grower who prefers a globe-shaped pink fruit. It is not recommended for spring forcing because of the tendency for the fruits to crack. Cracking can be controlled to a considerable extent by mulching and withholding water as much as possible. Trouble from this source does not occur in the fall and winter, and this variety should therefore be so grown that the fruits will ripen not later than May 15. Urbana Forcing matures about 10 percent more of its crop in the first month of picking than does Marglobe.