In the spring, the octagonal fruit enlargement period, due to the spring rain, humidity, temperature instability, a wave-like rise, it is easy to cause fruit drop, increase pests and diseases, we must strengthen the management of fertilizer and water and pest control, in order to promote young fruit and protect young If it prevents fruit drop, increase production and improve quality.
First, fertilize the fruit. After the temperature rises in the spring, total nitrogen, phosphorus and potassium fertilizers are used as the main fertilizer. If the tree is over 5 years old, apply urea 1.5 to 2 kg per plant, potassium dihydrogen phosphate 1 to 1.5 kg, or apply NPK fertilizer 2 to 3 Kilograms, spread after the rain, or under the canopy 6 to 8 depth 15 to 20 cm, width 30 to 40 cm, length 80 to 100 cm of the radiation channel.
Second, the prevention and treatment of pests. In the spring, check the leaves and fruits of the octagonal tree and find out that there are pests such as scale insects, powdery mildew, and tussock moths, that is, spray two to three times 800 times of trichlorfon, 1000 times of dichlorvos, and 800 times of methyl methacrylate. Bujin mixture, or 1000 times farmland music, 800 times carbendazim, 3,000 times the death of the net mixture to control, spray every 15 to 20 days, evenly spray all the leaves and fruits to start with water droplets to Dropping is appropriate. If rain falls within 4 hours after spraying, it should be reapplied again to improve the control effect.
Third, the top dressing. After the temperature rises in the spring, it must be sprayed once every 7 to 10 days with 5000 times cloud-120, 0.1% borax, 0.1% magnesium sulfate, 0.2% urea, 0.2% potassium dihydrogen phosphate mixture, or 5,000 times Yunda—120,800 times of high-efficient organic humic acid active liquid fertilizer, 1500 times of Shennongsu chelated fertilizer mixed liquid; or 5000 times of Yunda—120, 1000 times of green fenwei 1, and 10000 times of sprayed Shibao mixture. In order to improve the nutritional level of leaves and fruits, to prevent fruit drop, increase fruit set rate, increase production and improve quality.
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