Red meat pomelo summer management

In the summer, it is the root period of red-fruited pomelo, the long summer shoots, the young fruit, and the period of fruit enlargement. This period is an important period of fertilization in the whole year, and it is also a key pest occurrence period. It is imperative to grasp the various summer technical measures in a timely manner to promote the development of strong shoots and strong fruits, and to win harvests. The following points are put forward for summer management. 1 The timely application of strong fruit fertilizers and the timely application of strong fruit fertilizers are particularly important for improving the pomelo's strong shoots, strong fruits, and improving quality and yield. The strain produced 50 kg of fruit and applied Sanyuan compound fertilizer 2.5 kg, or urea 1 kg, potassium fertilizer 0.25, and applied 5 times. And appropriate amount of trace elements: 0.2% potassium dihydrogen phosphate + 0.2% borax mixed spraying one or two times. The Baoguo Ling No. 2 packet was diluted to 50 kg. 2 Thinning fruit, thinning, thinning in summer, thinning fruit, and summer shearing can ensure nutrient accumulation, adjust growth tree vigor, and promote vegetative growth to result reproductive growth and metastasis. 1 sparse sparse is sparse for all growing summer tips, sparse summer tips can reduce pest damage and increase fruit set, promote fruit enlargement. The sapling of young trees is the eradication of the early summer tips of “Establishment of Summer” to “Little Manchu”. The summer shoots of the later period are retained, and the summer shoots are used to pick up the heart, leaving only 5 leaves. As a result, the tree does not leave summer shoots, and it is necessary to often shoot in the orchard and wipe it to the front of the agency. 2 Fruit thinning and fruit thinning are important for the balanced growth of fruits, improving quality and yield. The fruit in the canopy has to stay longer. One fruit branch can retain 3 to 4 fruit trees; the taller fruit in the crown can be left in the right amount, and generally one branch can leave 1 fruit in the mother branch, and up to 2 can be sparse. 3 summer shears Summer pruning refers to the lack of pruning in winter and spring shoots are not timely topping the crown top leggy branches, peripheral dense branches, dead branches, pests and branches appropriate amount of cut, summer pruning should be light. Reasonable pruning is particularly important for adjusting growth vigor, ventilation and light transmission, reducing pests and diseases, promoting fruit enlargement and improving quality. 3 Pest control (1) Insect 1 Red spider. From January to June, the first peak, and from July to August, the low temperature peak occurred. Prevention: In early May, pyridazinone 2000 times solution or extinction 2500 times solution. In mid-June, it is 3000 times of full-strength. In mid-July, Chromium 3200 times liquid. 2 rust spiders. 5, 6, 7 key prevention period. Control agent: 80% zinc-enriched zinc 500 times, pyridazinone 2000 times. 3 scale insects. The main contents are: brown garden mediation, sagittal mediation, stacking wax powder mediation, and blowing cotton mediation. All kinds of scale insects should be controlled in the middle and early May, June and mid-June, July and the end of July for the first generation and the second generation of nymphs in the new incubation period. Pharmaceuticals include: Malathion 700 times, speed culling 700 times (in autumn). 4 locusts. Aphids are harmful to young shoots in spring, summer and autumn. Prevention methods: 50% horseradish sulfate 700 times, 80% dichlorvos 1000 times, each time shoots 5 cm before the spray 1 times. 5 leafminers. Leafminer is the main pest in nurseries and saplings. Control methods: young shoots 0.5 cm from the beginning, sprayed every 5 to 7 days, a total of 3 to 4 times. Can be used to kill chrysanthemum 3000 times, Ke Mobao 1500 ~ 2000 times liquid. 6 swallowtail butterfly. Occurs from 5 to 6 generations a year. The larvae initially eat the leaves on the edge of the tender leaves and eat up the whole leaf. Control methods: 80% dichlorvos 1000 times, dipterex liquid 1000 times. 7 蝽蟓. Adult worms and nymphs use a needle-shaped mouthpart to insert juice into fruit. Control methods: May-June nymphs use 50% of malathion 700 times and dipterex water 1000 times. 8 scarabs. Chafers occur in the grapefruit gardens of mountainous regions and are more harmful to new trees. Control methods: spraying 1000 times liquid of dipterex, 80% of dichlorvos 1000 times, and 700 times of malathion. 9 days cows. The newly hatched larvae feed on the bark, turn to the xylem and roots, and turn to the upper part of the trunk after September. Prevention methods: A, capture adult worms: After the beginning of May, various adult worms emerged out of holes and mated and spawned. The people should be promptly mobilized to catch adults around the trunk at noon on sunny days. B, scraping eggs: After the beginning of summer is the adult spawning period, it is necessary to regularly inspect the orchard, check the trunk below 30 cm from the ground, if found to have secreted spit glue, is spawning place, can be used to knife the egg Dig out and destroy, use drugs to block and inject wormholes or use hooks to kill larvae: always find the trunk wormholes, remove insects from the caves, use a 10 times cotton ball of dichlorvos to plug the hole, and then seal the hole with wet mud. Kill the larvae. (2) Disease 1 ulcer disease. Canker disease damages branches, leaves and fruit. Control methods: 0.3% to 0.5% times the amount of Bordeaux mixture, sprayed 10, 25, 50 days after the spray once. Pay attention to eradicate the summer and autumn shoots and destroy the leafhoppers. Spray the young streak before summer and autumn. 2 greasy spot. Stachysporium damage leaves late fruit. Control methods: Spring shoots 0.5 cm long, spraying copper ammonium mixture, 80% zein zinc 500 times liquid + Jinggangmycin 500 times liquid, from May to July each month. 3 anthrax. Anthracnose is a disease that damages leaves, branches and inflated fruit. Control methods: Spring tip spray 0.5% times the amount of Bordeaux mixture, Other times thiophene methyl 500 times spray. 4 sores. Scabs damage leaves, branches and fruit. Control methods: Spring shoots young leaf stage, young fruit control more important, copper ammonium mixture, Bordeaux mixture 0.5% times the amount. 5 ring disease. Harm the fruit of the branches. Prevention methods: Spring tip length 0.5 to 3 cm spraying copper ammonium mixture, thiophanate-methyl 500 times, fruit spray carbendazim 500 times + Jinggangmycin 500 times, in late April, mid-May, 8 In the middle of the month, spray two times.

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