Naphthylacetic acid can promote plant cell division and enlargement, induce formation of adventitious roots, increase fruit setting, prevent fruit drop, change male and female flower ratio, etc., and is widely used in fruit trees. 1. The Shuguo Golden Delicious and the Marshal were apples and pears, and after spraying for 20 weeks, they sprayed 20 mg/L of naphthylacetic acid. Guoguang Apple spent 10 days spraying 20 mg/L naphthalene acetic acid + 300 mg/L ethephon and received significant fruit thinning. effect. 2. To prevent pre-harvest fruit-dropping, marshals, and short-stemmed varieties, such as red jade apples, the pre-harvest fruit drop is more serious, in the 5 to 10 days before the fruit-falling period, spraying naphthalene acetic acid 30 to 40 mg / l, separated by 10 Spraying again 1 to 12 days prevents fruit drop before harvest and promotes fruit coloring. 3. Promoting cuttings rooting with 500-1000 mg/L naphthylacetate solution for root cutting (speeding) treatment of grape cuttings can increase the survival rate of cuttings and increase rooting volume. Talc powder 1000 grams plus 0.5 ~ 2.0 grams of naphthalene acetic acid powder, fully mix, insert the base with water soaked in the right amount of powder, insert the seedbed, this method is used for pomegranate and other difficult root cuttings. 4. Many varieties of the marshals and Fuji apples that prevent the cutting saw from slicing are easily bred and sprouted at larger cuts and cuts, which not only consumes large amounts of nutrients, but also seriously affects the ventilation and light transmission of the internal warts. If you use the 1% or 1.5% naphthalene acetic acid solution to apply scissors or kerf when cutting in winter, you can prevent sprouting. 5. Promoting rooting of seedling planting seedlings When saplings are planted, immerse the roots in a solution of 50 to 100 mg/L naphthylacetate for 20 minutes or spray on the roots to increase the survival rate. Dipping the roots with a low concentration of naphthalene acetic acid for a longer time before colonization can also achieve good results. 6. Preventing grapes from falling grains at the size of the pea grains of the grapes prevents maceration by impregnating the ears with 300 mg/L naphthylacetic acid. 7. Promoting Seed Germination Hawthorn seed has a thick and hard shell and is difficult to germinate. It requires two winters before germination. Soaking seeds with 50-100 mg/L naphthalene acetic acid can promote the germination of hawthorn seeds. 8. The promotion of parthenocarpy in strawberry flowering treated with 0.25 mg/L NAA ointment can induce parthenocarpy of strawberry. 9. Promoting the healing of lesions in 50 % of 40% Formamide arsenic, 50 mg/L naphthylacetate, can significantly improve the healing rate of rot disease, reduce the recurrence rate of rot, and further improve the control effect. 10. To promote the grafting of the graft, prepare a solution of 100 g of naphthalene acetic acid 1 g of water, and then use waste paper to cut into strips and dip into the solution, and remove the dry and ready-made hormone paper. The use of hormone paper to bind the grafted parts of fruit trees is conducive to the formation of callus. Compared with unwrapped, it can survive 3 to 5 days earlier.