(a) The bee pollination. Longan is a dichogamous insect-borne, wind-borne flower, mainly insect pollinating. Bees are most active in a radius of 250 meters, so bee colonies are best scattered in orchards. A group of bees (8 to 10 baskets of bees) are deployed every 0.46 to 0.53 square kilometers longan park. At the large longan base, a group of 50 swarms of bees is set and a group of bees are set every 500 meters. The bee colony pollinating the fruit trees should be a strong bee colony with new queen bees, and strengthen feeding management to promote the proliferation of bee colonies and increase the enthusiasm of bees. The bee colony should be transported to the orchard two to three days before flowering. During the bee-keeping period, insecticides should be suspended from the orchard and nearby orchards, vegetable gardens and crops. (b) Artificial pollination. During the male flower's blooming period, use a clean wet towel to repeatedly adhere to the anther to stick the pollen, and then quickly brush into the water. When there are a large number of pollen, spray the cloth with a clean sprayer immediately to the female flower. Pollen can not be immersed in water for more than 20 minutes. Pollen will germinate and fail if it exceeds 30 minutes. Washing pollen with immersed full-bloom inflorescences into the water should also be used to collect flowers at the same time. Pollen is quickly washed out in 1-2 minutes and sprayed through a nylon net yarn. In the event of lack of pollination on rainy days, pollen should be collected in a dry, low-humidity container and sprayed in the dilution water as the weather improves. (c) Fruit thinning. The fruit thinning time should be from mid-June to early July. Early-maturing varieties are sparse, late-maturing species are late sparse, and more than 1/4 of the trees at the end of the last stage have no fruits. Don't get rid of the ear. Too much of the ear (80%? 100% prosperous and prosperous) ) To spam 10% to 30% of the ear, leaving 60% to 70% of the robust mother tree. The dense ears, the top of the crown, the ears with too few fruits, and the ears damaged by the pests were cut off, leaving the ears with branches and leaves in the lower part of the crown. (D) Ears bagged. The ear bagging helps to prevent damage to the fruit, such as stink bug, yellow bee, and bat, so that the skin of the fruit is smooth and bright yellow, and the cracking fruit is reduced, and the quality of the product is improved. Tests have proved that the use of plastic gauze bags longan ear, not only ventilation, there is a certain degree of shading, can reduce the noon fruit surface temperature of 0.2 ~ 1.5 °C, reduce the occurrence of young fruit sunburn, play a role in pest control against bats.
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