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China: Heavy rains affect Fuji apples

Since the beginning of October, strong "autumn" weather has continued in Northwest China. In most provinces and cities of the region, rainfall reached more than 200 mm. According to weather reports, the rains should end around October 23. Cloudy and rainy days, a lack of sunlight and low temperature have had a negative impact on Fuji apples. There are four main consequences:

1. Root hypoxia: Because of excess water, the soil became saturated. Roots didn't have enough oxygen and the absorption process was hampered. 

2. Early leaf infections: Apple leaf spot disease is also the result of excess moisture - it dilutes the protective effect of fungicides and leaves start to wilt and fall. 
 
3. Fruit surface rain erosion: Because of the prolonged ripening period, red Fuji apples have rain-impact erosions. From mid-July to the first week of August, the temperature was 30 degrees, which caused cracks on the apples' surface and made the fruits more vulnerable to infections 

4. Flower bud differentiation. October is nutrient accumulation time for apple trees. Rainy and cloudy weather have greatly reduced leaf photosynthesis, which led to flower bud differentiation. The amount of "abnormal flowers" has increased. This will badly affect next year's apple vloumes and quality.

Source: Fruit Service Center


Publication date: 10/17/2017


 


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