Abstract:

Abstract: With paraffin section technology and fluorescence microscope, the process of fungal invasion into mango inflorescence was observed. Results were as follow: Fungal infection rate of different year was different from each other, and was highly correlated to the weather condition while materials were chosen. The infection rate of mango buds by fungus rose from 37.80% of normal condition to 68.18% under low temperature. Some fungal conidiophores germinated and grew in flower lacuna and then invaded into interfloral nectary through interspace among cells to produce sporangium or invaded into vessel to produced sporangium, after which conidiophores spread inside through vascular bundle. While some germinated on calyx surface then invaded inside to cause putrescence. Fungal infection played an important role in flower and fruit drops during early development.