The prevention and treatment of flowering and fruit falling caused by poor pollination and fertilization of walnut trees:
The male flower of hickory has a short flowering period, while the female flower has a long flowering period and waits for pollination. Therefore, pollen is collected for artificial pollination. When the male flower inflorescences start to loosen individually, the male inflorescence of pecans is collected from 8 to 10 am, and the pollination period is appropriate when the stigma of the female stigma changes to purple, swelling, and mucus. The pollen is placed in a 3-layer gauze bag and hung on a bamboo pole. The person lifts the bamboo pole while walking in the forest and shakes or hangs the pollen bag (2 layers of gauze) on the high wind outlet. If the wind blows, it can also be scattered. Dissolve pollen in water and spray it.