Careful use of herbicides for flowers in nursery

When choosing herbicides, it should be noted that many herbicides are not suitable to be used in gardens, flower nurseries and lawns.

1. Post-seedling herbicides to control broad-leaved weeds, such as bentazon, herbicide, trimethoprim, trimethoprim, etc., can not be used in nursery, garden and Dichondra lawn.

2. Post-seedling herbicides for the control of Gramineae weeds, such as high-efficiency herbicides, Jing Shengshou, Jing Gao Ke, Najiaojing, Shoulotong, Penton, etc., are not suitable to be used in Gramineae lawns. This kind of herbicides can not only control Gramineae weeds, but also harm the lawn.

3. Long-lasting herbicides-sulfonylurea herbicides such as chlorosulfuron, methanesulfuron, benzenesulfuron, picosulfuron, trimethoprim, aminobenzenesulfuron, nicosulfuron, Imidazolinone herbicides such as propoxide, heterocyclic herbicides such as paspalum, Guangmieling, etc. These herbicides last too long in the soil. In nurseries where these herbicides have been used, flower seedlings planted after 3 years may be damaged. Metsulfuron will cause spray on tall fescue lawn and cause yellowing and death of tall fescue grass. Trimethoprim can cause albinism of lawn plants.

4. Herbicides which are toxic to soil, such as amides, ureas, triazobenzenes, alachlor, Acetochlor, fucazuron, sekezin, simazine, atrazine, prometryne, cottongrass and so on. If these herbicides are applied in the lawn, it will affect the root system of lawn plants in the case of stagnant water, and then affect the development of lawn plants; in the place of continuous application, it will cause soil structure deterioration and consolidation, affect the ventilation of the soil around the roots of lawn plants, and then cause lawn plants to yellowing.

5. Highly toxic or carcinogenic herbicides, sodium pentachlorophenol and paraquat, are highly toxic and are absolutely prohibited in nurseries and lawns. Herbicide ether has been banned in many countries because of carcinogenicity, and it has been banned in China since 2000. Lasso has carcinogenic effect on animals and is not suitable for use. Trifluralin has been banned in Europe because of carcinogenesis.

6. The problem of drift pollution of herbicides with drift pollution, such as Baicaodi, Hedazhuang, etc. Generally, there are flower seedlings around the lawn, spraying herbicides such as herbicide and grass strong on the lawn will affect the growth of the surrounding flower seedlings.

7. Herbicides with peculiar smell, such as the smell of 2-methyl-4-chlorine, are irritating to people, have an effect on people's stomach after inhalation, and cause drug damage to seedlings, so it is not suitable to be used.

8. Extinct herbicides, such as glyphosate (Roundup), paraquat (gram without trace), etc. Although some seedlings have a certain tolerance to low-dose glyphosate, sometimes the damage caused by glyphosate to seedlings is difficult to judge intuitively, and sometimes the damage is slow, and it is inevitable to drift when spraying glyphosate, which can cause damage to the surrounding sensitive flowers and seedlings.

In a word, the selection of herbicides should not only prevent the direct damage to the lawn of flower seedlings, but also prevent some potential, possible and recessive harm, so as to avoid irreparable damage to the yield, quality and surrounding environment of flowers, seedlings, lawns and lawns. Herbicides with wide herbicide spectrum, moderate efficacy period, good eradication effect and no pollution should be selected according to different needs, varieties and periods.