Index of pear seedling coming out of nursery
Pear seedlings out of the nursery index level project first-class secondary varieties and rootstock types pure root lateral root number more than 4 more than 3 main root length more than 10 cm length of lateral root length not less than 15 cm, diastolic stem rootstock length less than 10 cm, height more than 130 cm, more than 100 cm thickness (5 cm above ground) more than 1 cm rootstock treatment rootstock stakes must be cut off The number of full buds in the plastic zone is more than 6. Note: the yield of seedlings per hectare is less than 150000. The rootstock of pear in Beijing area should be du pear or mountain pear.
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A New very late ripening and High quality Peach Variety: Wangmu Hongxiantao
Wangmu Hongxiantao, also known as Jinzui Xiantao, is a new late-ripening and high-quality peach variety in China. Its main characteristics are: late ripening, large fruit, red color, sweet, storage resistance, transportation resistance, high economic value, so it is a very promising variety of extra late maturity and high quality. 1. Botanical characteristics the tree is strong and upright. The trunk and perennial branches are white and smooth. Annual branches reddish brown, internodes short, average 1.53 cm. New shoots flourish from mid-May to mid-June, secondary shoots flourish from July to August, and secondary branches grow the most.
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Prevention and control of apricot gum disease in greenhouse
Apricot gum disease is a typical physiological disease, which is caused by many causes, such as hail injury, insect injury, frostbite, sunburn, mechanical trauma, etc., which is easy to cause gum disease in high grafting or branch renewal. Overpruning in summer, improper fertilization, heavy clay of soil, strong acidity, improper use of pesticides and drug damage can induce gum disease. Only by mastering the incidence law of the disease, can we achieve effective prevention and treatment. The symptoms, pathogenesis and prevention techniques are introduced as follows: symptom flow mainly occurs in
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