Study on Disaster Index of Ledu Cherry

Based on the data of Ledu national weather station, regional weather station and grid based temperature and precipitation data,through the investigation of the damage caused by agricultural meteorological disasters in Ledu cherry production in recent years, the comparative analysis of the data of automatic weather stations in the planting area and the ground meteorological observation data of the regional meteorological bureau, it is concluded that the temperature index of the late frost damage of the big cherry during the flower bud period is as follows The temperature index of late frost damage in flowering and young fruit stage is-1.0 ℃. The freezing degree of flower bud, flower and young fruit was affected by cooling rate and low temperature maintaining time. Fruit cracking could be caused by continuous rain for more than 7 hours at the mature stage, which affected the fruit quality.