| 1. | The category , distribution , appearance characteristic , ecological and biological characteristic , damage trait and occurrence regulation of dodder are illustrated , on the basis of investigation and study of alfalfa dodder for many years
在对苜蓿菟丝子进行了多年调查研究的基础上，阐述了菟丝子的生物学特性、危害特点和发生规律等。 |
