Grey jujube
The main producing area is Zhengzhou and Xinzheng in central Henan. The fruit is long oval, the single fruit weighs 10 grams, and the pulp is tight. The sugar content is 30% for fresh jujube and 85.3% for dried jujube. The fruit is small and sweet, and the kernel is larger. Dry the improved seed. It belongs to the high quality ones with strong adaptability among the old varieties. The mature period is in the middle and late September. Suitable for planting in Henan, northern Jiangsu, western Zhejiang and so on.
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Control techniques of peach blossom leaf shrinking disease
First, symptoms and damage to the disease occur from time to time in the south, causing branch blight when the disease is serious, affecting ornamental. The disease is mainly harmful to leaves. In early spring, the leaf margin curls downward, the local or whole leaves of the diseased leaves become blister-like, the leaves become thicker, brittle, yellow or red, and the leaves are twisted. The disease is covered with gray-white powder layer in early summer, and the leaves fall early when the disease is serious. The young shoots were grayish green or yellow when damaged, the internodes were short and thick, slightly curved, and the upper leaves were clustered and curled. The branches withered when they were seriously ill. Second, the pathogen and the characteristics of the disease
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Hongpi pear rookie-- Hongxiang crisp
Hongxiang Cake was bred by Zhengzhou Fruit Tree Institute of Chinese Academy of Agricultural Sciences in 1980 with Korla fragrant pear and Zhengzhou goose pear. In 1986, it was selected as a superior line, codenamed 80mur4Mel 6. In October 1997, it passed the crop variety examination and approval in Henan Province, and named it "Hongxiang Crisp". It overcomes the shortcomings of Korla fragrant pear, such as small size and low sweetness, and becomes the leader of today's red pear. In the spring of 1994, some branches were introduced by Zhengzhou fruit trees, and 11-year-old Yali pears were grafted and replaced in batches.
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