What is the use method of stone sulfur mixture?

① The concentration used depends on plant species, plant diseases and insect pests, climatic conditions and service life. Too high concentration or too high temperature can easily cause phytotoxicity. The spraying of trees and flowers in dormant period (early spring or winter) is generally controlled at 3 ~ 5 Baume, and the concentration used in growing season is 0. 1 ~ 0.5 Baume.

(2) Before use, the degree of the stock solution must be measured by Baume hydrometer, and the amount of water added should be calculated according to the required concentration and diluted with water. Formula for diluting sulfur mixture stock solution to target Baume degree per kilogram with water:

Water addition (kg)/kg stock solution = (Baume degree of stock solution-target Baume degree)/target Baume degree.

③ Common methods: A. Spray method. Spraying can prevent and control red spiders, scale insects, rust, powdery mildew and so on. Spraying 0.3-0.5 Baume on trees and flowers after germination; In order to control the rust of Rosaceae trees, the pathogen overwinters in the host of conifers (juniper, juniper, cypress, etc.). ) exists in the form of mycelium, so before trees germinate in spring, 0.5 ~ 0.8 Baume sulfur mixture should be sprayed on conifers to control the spread and spread of germs; Spraying lime-sulfur mixture with 0.2 ~ 0.3 Baume degree in the growing season has better control effect on lawn rust and rose rust; Spraying 0. 1 Baume sulfur mixture after germination has special effect on controlling hawthorn spider mite. Spraying 3 ~ 5 Baume sulfur mixture before germination in winter and early spring can effectively control cotinus coggygria powdery mildew, apple flower rot and bacterial perforation of peaches and plums, and kill nymphs, adult mites, nymph mites and mite eggs of overwintering scale insects. B. dry coating. After pruning dormant trees, the trunk and main branches of Lagerstroemia indica and pomegranate were coated with sulfur mixture stock solution, which basically eliminated Lagerstroemia indica. Wound healing agent. Disinfection and scraping of wounds with sulfur mixture stock solution can reduce the infection of harmful bacteria and prevent the occurrence of rot and ulcer.