位于悉尼的 Virgin公司称 ,1 998年已成功地对自动落叶的棉花新品种 Rainbow39进行了首次田间试验。该品种的产量较常规品种为低 ,蔓生 ,但长至成熟时可以自动落叶 ,比常规棉的化学脱叶晚5天左右 ,便于机械收花。当棉铃开始吐絮时 ,棉株开始逐渐自动脱叶 ,纤维品质由于是强迫成 Virgin, based in Sydney, said it had successfully conducted its first field trial of artificial leafless new variety Rainbow39 in 1998. The yield of this variety is lower than that of conventional varieties, but it can be deciduous automatically as long as ripening, which is about 5 days later than that of conventional cotton. It is convenient for mechanical harvesting. Cotton boll began to vomit, the cotton began to gradually automatic defoliation, fiber quality is forced into