【摘要】 通过研究认为,在同一无性系或同一品种的泡桐内,生长量较小的植株,一般不易发生丛枝病或发病较轻;而生长量较大的植株,一般容易发生丛枝病或发病较重。但在不同无性系或不同品种之间不存在这样的规律。更多还原

【Abstract】 It was found that within the same clone or variety,paulownia plants with lower growth were unsusceptible to witches’ broom,and those with higher growth however,were susceptible to witches’ broom.This rule did not exist among the plants from different clones or varieties.更多还原