1. Remove dried and diseased branches. Remove all dried and diseased branches and leaves before sprouting. Scrape moss and plaster spots on the trunk and branches. The wormhole was blocked with the medicine and the whole tree was sprayed with 8 to 10 times rosin mixture or 0.5 Baume of lime sulfur, and 0.5% of compound fertilizer was added to promote flower bud differentiation.
2. Fertilizer shoots before application of buds are the nutritional basis for the whole year. It is very important to fertilize the sprouts before sprouting. Fertilizers should be applied 30 or 20 days before sprouting. Pre-production of 50 kg of fruit requires 100 kg of manure and 2.5 kg of compound fertilizer. Note that pure nitrogen fertilizer (such as urea) cannot be applied to the pre-embryo. After Xiehua, it is appropriate to supplement nitrogenous fertilizers to multi-floral and multi-fruit trees and apply urea or manure water.
3, soil fertilization on the bare roots of the tree, with soil miscellaneous fertilizer earth mulch. Ten days before the spring shoots sprouted, 150 kg of fertilizer was applied to each tea cake and manure, and 0.4 kg of urea was added per 100 kg of fertilizer. You can also apply 2 to 3 kg of compound fertilizer per plant. For the rooted compacted soil, fertilize soil first.
4. Application of foliar fertilizer 10 days before flowering and initial flowering stage, spray with 0.05% to 0.1% borax + 0.5% zinc sulfate + 0.5% urea aqueous solution once, in order to promote the turning of spring shoots as soon as possible. In the flower bud stage, 0.2% borax + 0.5% potassium dihydrogen phosphate aqueous solution can also be sprayed 1 or 2 times to increase the fruit setting rate.
5, artificial pollination When the flowers open into a "10" shape, the acid grapefruit pollen points to the flower head, every day, 8 to 11 o'clock, 3 to 5 o'clock in the afternoon is appropriate. In general, each sour pomelo flower can be given 20 to 30 pomelo flowers.
6, pest control Shatian grapefruit from the bud, flowering to the results generally appear successive locusts, spider mites, larvae and other moth larvae pest damage. Red spiders can be controlled by oil emulsions. Aphids and moth larvae can be killed by common insecticides. After the spring shoot turns green, acute leaf anthrax can occur in case of rainy weather, causing defoliation and fruit drop, which can be sprayed with Bordeaux fluid.
2. Fertilizer shoots before application of buds are the nutritional basis for the whole year. It is very important to fertilize the sprouts before sprouting. Fertilizers should be applied 30 or 20 days before sprouting. Pre-production of 50 kg of fruit requires 100 kg of manure and 2.5 kg of compound fertilizer. Note that pure nitrogen fertilizer (such as urea) cannot be applied to the pre-embryo. After Xiehua, it is appropriate to supplement nitrogenous fertilizers to multi-floral and multi-fruit trees and apply urea or manure water.
3, soil fertilization on the bare roots of the tree, with soil miscellaneous fertilizer earth mulch. Ten days before the spring shoots sprouted, 150 kg of fertilizer was applied to each tea cake and manure, and 0.4 kg of urea was added per 100 kg of fertilizer. You can also apply 2 to 3 kg of compound fertilizer per plant. For the rooted compacted soil, fertilize soil first.
4. Application of foliar fertilizer 10 days before flowering and initial flowering stage, spray with 0.05% to 0.1% borax + 0.5% zinc sulfate + 0.5% urea aqueous solution once, in order to promote the turning of spring shoots as soon as possible. In the flower bud stage, 0.2% borax + 0.5% potassium dihydrogen phosphate aqueous solution can also be sprayed 1 or 2 times to increase the fruit setting rate.
5, artificial pollination When the flowers open into a "10" shape, the acid grapefruit pollen points to the flower head, every day, 8 to 11 o'clock, 3 to 5 o'clock in the afternoon is appropriate. In general, each sour pomelo flower can be given 20 to 30 pomelo flowers.
6, pest control Shatian grapefruit from the bud, flowering to the results generally appear successive locusts, spider mites, larvae and other moth larvae pest damage. Red spiders can be controlled by oil emulsions. Aphids and moth larvae can be killed by common insecticides. After the spring shoot turns green, acute leaf anthrax can occur in case of rainy weather, causing defoliation and fruit drop, which can be sprayed with Bordeaux fluid.
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