Symptoms: Cauliflower is very sensitive to trace elements such as boron. Boron deficiency often causes empty holes in the center of the flower axis. In severe cases, the flower bulb becomes rust-brown and bitter, and the flowering branch of the remaining plant strains is not easy to loosen. Etiology: Boron deficiency in the soil is 0.310ˉ6, which is the critical value of boron deficiency. Prevention methods: Each 1/15 hectare (1 mu) can be made up of borax or 50 grams of boric acid to form an aqueous solution, which is applied to the planting hole as a base fertilizer. Or with 0.1% to 0.2% borax or boric acid for extra-root topdressing to spray early in the plant growth. Hospital Nitrile Gloves,Exam Nitrile Gloves,Nitrile Gloves Bulk,Medical Hand Gloves Powder Free Puyang Linshi Medical Supplies Co., Ltd. , https://www.linshimedicals.com