01756nam a2200205 a 450000100080000000500110000800800410001902200140006010000200007424500500009426000380014430000080018249000500019052012350024065000160147565300170149165300110150870000160151970000150153516400992014-02-06       1985    bl uuuu     u0uu1 u    #d  a0271-99161 aHAMILTON, R. A.  aBetter Rootstocks for Citrus Grown in Hawaii.  aHonolulu: University Hawaiic1985  a7p.  a(University Hawaii. Research Extension, 053).  aCitrus fruits have been grown in Hawaii since 1792, when seeds of the so-called Hawaiian orange were introduced from Capetown, South Africa, by CaptainGeorge Vancouver. This same type of orange has been known on Hawaii as the Kona orange, on Oahu as the Waialua orange, and on Kauai as the Waimea orange. Since this original introduction, thousands of citrus trees of several different species have been grown in home fruit gardens. Numerous small, semicommercial plantings of tangerines, limes, and oranges have been made, but acreages have remained small; at present thereare only about 120 acres of commercial orange plantings and 25 acres of tangerines in the State. In the past, very little attention was paid to selecting the most suitable rootstock for citrus. A large proportion of the citrus trees in the State are either seedlings or air-layered trees. In Hawaii, citrus has usually been grown on rootstocks chosen for convenience or by circumstances, rather than for desirable or useful qualities. In recent years Troyer citrange, Cleopatra mandarin, Swingle citrumelo, and several other rootstocks have been tried in Hawaii although there has been little or no experience or background informatios on their perfomance.  aCrescimento  aAugmentation  aCitros1 aCHIA, C. L.1 aITO, P. J.