Studies on the Pollination Vectors of Cycas enlongata
越南篦齿苏铁传粉媒介的研究

The pollination vectors of Cycas elongata were studied using exclusive method and introduction insects.The results showed that the seed setting were 55.3% and 57.2% by wind and insect as pollination vector,respectively,which were lower than that under natural pollination(63.5%).The pollinating peak of C.elongata was at the day,and little in the dark.The pollen grains by wind were more within 3 m from the male plant,and decreased markedly over 3 m.It was conclude that wind and weevils were effective pollinat...