Abstract:

To study the effect of temperature and humidity change on the occurrence of ‘Hongyang’ kiwifruit ulcer disease, based on monitoring data of ulcer disease from March to April in 2013 to 2018 of 5 test areas in Houchang, Miluo, Shaomi of Shuicheng County, Langdai of Liuzhi Special Zone and Pugu of Panzhou City, and the observation data of temperature, humidity and days of persistent rainfall in the same period, we used mathematical statistics to analyze the relationship of the occurrence and the prevalence of ulcer disease of ‘Hongyang’ kiwifruit with temperature, humidity and days of persistent rainfall. The results showed that the temperature and humidity condition for the starting time of ‘Hongyang’ kiwifruit ulcer disease was precipitation weather (daily precipitation ≥0.1 mm) for 4 days or more, the average daily temperature≤15.0℃ and the average daily relative humidity≥80%, in addition, after the occurrence of the disease, the low temperature, overcast and rain and high humidity maintained for 1 day or more. The climate condition for the prevalence of the disease was precipitation weather (daily precipitation ≥ 0.1 mm) for 4 days or more, the daily average temperature ≤18.0℃ and the daily average relative humidity ≥ 80%, in addition, after the prevalence of the disease, the low temperature, overcast and rain and high humidity maintained for 1 day or more. In conclusion, the occurrence and prevalence of ‘Hongyang’ kiwifruit ulcer disease has a good response to the change of temperature and humidity in Guizhou Province.

Key words: ‘Hongyang’ kiwifruit, ulcer disease, monitor, temperature, humidity, days of persistent rainfall, relationship