What is the index of citrus frost injury?
Citrus freezing injury is a major disaster of citrus production in China, especially in the middle and lower reaches of the Yangtze River and the north. The large fluctuation of citrus yield is often directly related to the low temperature freezing injury during overwintering. According to the degree of freezing injury, the meteorological index of citrus freezing injury can be divided into four temperature grades:-5 ℃,-7 ℃,-9 ℃ and-11 ℃, which represent the indexes of citrus starting to suffer frost injury, mild frost injury, freezing injury and severe freezing injury respectively.
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Management and cultivation techniques of citrus in late stage
Orange picked with new lipid membrane solution after soaking on orange storage period of green, green mold, anthracnose, stem rot, black rot, etc. have good control effect, at the same time can prevent water evaporation, prevent bacteria infection, frost insulation, does not affect the crop water absorption, ventilation and light transmission, protect crops from external diseases infection, prolong preservation...
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Measures to control citrus rust wall lice
Pay attention to the inspection of citrus plants, when there is a rapidly expanding layer of yellowish gray on the leaves and fruit surface, and when there are individual black fruits on citrus plants, or with a 10-fold magnifying glass, it is found that there are 2 and 3 rust wall lice in each field of vision, it is necessary to prevent and cure them in time. You can choose MMel 45 Dasheng 600 times solution, or 25% triazotin 1.
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