“清园春”园圃除草剂是美国高恩公司（GOWAN）综合成千上万除草剂单剂作用机理的理论基础上，运用不同单剂对不同苗木进行组合，反复试验示范对照总结，经过不断筛选，最后成功复配合成对绿化苗木安全的专用二元广谱除草剂。2015年由Try Again Group Ltd Co.引入中国香港。
"QingYuanChun" herbicideS the U.S.GOWAN integrated tens of thousands of herbicide mechanism based on the theory of single dose, using different single dose to combination of different seedlings, repeated experiment demonstration comparison summary, after screening, finally success after cooperate with green seedling security special binary broad-spectrum herbicide in pairs. In 2015 by the Try Again Group Ltd Co. is introduced into China, Hong Kong.
Scope: landscaping tree seedlings. Apply garden green, the color piece ribbon and all kinds of tree nursery. Gramineae, herbaceous flowers and seedlings was cutting seedling nursery and disabled.
Two, use period: two years or more than two years of woody or woody seedlings seedlings transplanting survival robust growth.
3, control of weeds, most efficient control under the leaves of five gramineous weeds and broad-leaved weeds, cyperaceae weeds. More than 5 leaf weeds effect is poor, lignification of weeds is invalid.
Four, the conditions of use: the day before spraying, water pouring through of nursery stock. High humidity effect is good, the drought effect is poor.
Five, the medicine effect: after 24 hours to stop growing, 7 to 15 days began to wither yellow weeds, 10 to 25 days to death step by step.
Six, the use of rules:
1, the dilution Using the secondary dilution method
2, the dosage:66g use to 667m2
3, with directional spray processing, the weeds leaf spray mask to evenly spray weeds on both sides of blade will be subject to weed stem foliar spray through water, try not to spray on seedling young leaves and buds.
4, because the agent weed control effect is influenced by temperature, soil ph and moisture, thus proposed in front of the large area is used for small area demonstration, fine-tuning the recommended dose in order to achieve the best weeding, it is forbidden to use beyond the maximum recommended dose.
5, due to climate and soil environmental impact relative dose partial seedlings slight phytotoxicity, roughly can spraying on the leaf gibberellin or foliar fertilizer nourished, 10-15 days later returned to normal.
6 do not artificial weeding, spraying, 10 days, otherwise it will affect the weed control effect.