Li Zhen;Yang XuYing;Yonghong Yan

Yunan Key Laboratory of Plant Pathology,Yunnan Agricultural University,Kunming 650201,Chin;Yunan Key Laboratory of Plant Pathology,Yunnan Agricultural University,Kunming 650201,China

kunth;iphigenia indica;bulb;bulb rot;micronutrient fertilizer;enric

[Objective]The new control methods of the bulb rot of Iphigenia indica Kunth.caused by Fusarium orthoceras App.et Wr.var.longius(Sherb.) were explored.[Method]The effect of eight different kinds of metal ion on the pathogen was studied;the contents of seven different kinds of metal ion in rhizosphere earth and bulb were also determined.[Result]The results showed that when the concentration of Cu2+ or Mg2+ was higher than 1.0 mg/L or the concentration of Zn2+ or Ca2+ was lower than 0.5 mg/L,the growth of pathogen could be restrained.The results also showed that the bulb could enrich K highly,enrich Zn and Mg,limit the absorption of Ca and Fe,and inhibit the absorption of Cu and Mn during the growth process of bulb in Iphigenia indica Kunth.[Conclusion]Micronutrient fertilizer containing Mg could be used to prevent and cure the bulb rot of Iphigenia indica Kunth.