Summer tea garden management catches four points

In summer, the temperature rises gradually, the water evaporation is large, the tea garden is susceptible to drought, and there are many pests and diseases. It is essential to improve the summer tea production and improve the quality and benefit of summer tea garden management.

After the completion of the cultivating and weeding spring tea, shallow ploughing and weeding are carried out between the tea gardens, 10 to 15 cm deep, and the weeds on the tea garden ladder and the surrounding areas are cut off, and the herbicide is not used.

Topdressing and tipping (1) Ditch application or spreading: The planting tea plantation can be fertilized between the planting rafts or while pulling the small ditch, and the soil is reapplied after application; the sorghum planted the tea plantation, which can be applied before or after the rain. In the young garden, 5~10 kg of urea or 7.5~10 kg of potassium sulphate compound fertilizer, 10~15 kg of urea in adult tea garden or 15~20 kg of potassium sulphate compound fertilizer and 5 kg of urea; (2) external spraying : During the development period of the second and third leaves of Yuyi, choose cloudy or sunny morning and spray 0.5~1% urea solution in the evening.

If the soil is dry after 5 months of soil cover, in order to ensure the water demand of the tea shoot growth, the soil must be kept moist to ensure the water supply. For this reason, soil cover measures should be taken to cover the weeds with 5~8 cm thick weeds. Or straw, or cultivating the grass to cover the surface.

The prevention and control of pests and diseases will prevent tea leaves, black thorns, and mites from harming summer and autumn shoots.

Tea green leaf 蝉: (1) Control indicators: the number of variegans exceeds 6 (46 heads) or more than 15 heads per square meter. (2) Agricultural measures: strengthen the management of tea gardens, remove weeds in tea gardens, and deteriorate the habitat; timely picking in batches can reduce eggs and deteriorate nutrient conditions and reduce damage. (3) Chemical control: Before the peak of nymph, you can use any of the following agents to control the spray: 1000 times of insects (5 days, safe interval, the same below) or 10% of imidacloprid 2000~3000 times (7-10 days) 25% Akthai water granules 15000~20000 times (7-10 days), 1.1% green waves 1000~1500 times (7-10 days), 2.5% Uranus 3000~6000 times (7-10 days) 0.2% matrine water solution 600 times liquid (7 days), spray the tea garden around the first spray, apply from outside to inside.

Black thorn powder: (1) Cut off dense insect pests, promote ventilation and light transmission, timely cultivating, fertilizing, enhancing tree potential, and improving plant resistance to insects. (2) The control index is 2 average leaf worms, which should be controlled. When the 1st instar larvae accounted for 80% and the 2nd instar larvae accounted for 20%, it was suitable for prevention and treatment. (3) Chemical control: 50% phoxim emulsifiable concentrate 1000 times solution, 2.5% Uranus emulsifiable concentrate 1500~2000 times solution, and 25% chlorpyrifos emulsifiable concentrate 1000 times solution. The safety interval is correspondingly 5 days, 6 days and 14 days. (4) Black thorn powder is mostly on the back of tea leaves. Pay attention to spraying evenly when spraying; serious tea gardens can also be prevented during the adult period.

Oysters: (1) Agricultural control: In the central area of ​​the occurrence of mites, timely removal of cockroach eggs. (2) Chemical control: 0.9% worms 1000-2000 times liquid, 15% ketone ketone emulsifiable concentrate 300 times liquid, 73% ketone 2000 times liquid; non-picking period 45% stone sulphur mixture crystal 200-300 times liquid.

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