First, the apple blossoms of apple trees are the first flowers in the center, and flowers are successively opened within two days. An inflorescence flower usually takes 5 to 6 days from flowering to culturing, and the single flower opening time lasts 4 to 5 days. After 3 days of opening, the stigma began to turn yellow and wilted. Pollination fruit setting rate was the highest on the day of flower opening, and pollination could not be fruited after 4 days of opening. Usually, the first batch of flowers has a high fruit setting rate, the second batch of fruit set has a medium rate, and the third batch of fruit set has a low rate. Therefore, artificial pollination must catch the first flowers. In general, apple pollination time is valid between the day before flowering and the third day after flowering. The pollination effect is best when the flower is open on one day; it is appropriate to use no wind, breeze and sunny weather from 9am to 16pm in one day. . Therefore, artificial pollination must pay close attention to the time. Second, pear pear blossoms generally open in the early morning after 8 o'clock in the morning, the flowers open on the day can be pollinated, flowering pollen best 1 to 2 days, the third day pollination fruit set rate is very low. The best time for pollination in a day is 8 to 14 hours. The clearer the weather, the better the pollination effect. In the pollination process, how to determine the opening time of flowers can be identified by the color of anthers. The flowers that bloomed on the same day were anthers in pink. Some of the anthers on the second day were powdered in black and brown. On the third day, all the anthers turned almost dark brown. For such flowers, they were pollinated due to wilting. The stigma has no effect. Wenzhou Celecare Medical Instruments Co.,Ltd , https://www.celecaremed.com