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Seven Points For Attention When Using Herbicides
Source: | Author:pmo9a49c2 | Published time: 2022-01-18 | 342 Views | Share:

1. Pay attention to the selectivity, specificity and timeliness of chemical herbicides, and do not misuse or misuse.


2. Strictly control the restricted dose. The use of herbicides should be based on the specific soil quality, taking into account the microclimate of the farmland, and strictly in accordance with the dosage range, concentration and amount of the drug specified in the drug description.


3. Reasonable mixing of drugs. When two or more herbicides are used in combination, the mixing ratio, application time and spraying technique must be strictly controlled, and whether there is resistance or other side effects between each other should be considered. A small amount can be used for the miscibility test first. If precipitation, flocculation, stratification, floating and deterioration occur, it indicates that its safety has changed, and it cannot be mixed. In addition, attention should be paid to the synergistic function of the mixed agent. For example, the herbicidal effect of the mixture of Shacadan and propanil is greater than the sum of the herbicidal effects of each single agent. When using, reduce the dosage of the mixed agent (usually half of each single agent) Within) to avoid phytotoxicity and ensure the safety of medicinal materials.


4. Pay attention to pesticide application isolation and wind direction, and the droplets are not too thin, so as not to drift and cause nearby farmland to suffer from pesticide damage, and pay attention to the impact on the next crop.


5. Master the best time and technical operation essentials for herbicide application, properly store the medicament, prevent misuse, and clean the spray equipment to avoid misuse and cause phytotoxicity to other crops.


6. Pay attention to the influence of environmental conditions on herbicides. Factors such as temperature, moisture, light, soil type, organic matter content, soil cultivation and soil preparation level, etc., will directly or indirectly affect the herbicide's weeding effect.


7. Flexible medication. The herbicide and weeding method for the base of medicinal plants should be carried out under dew-free conditions to prevent the stems and leaves from contacting the liquid. For pesticides that are sensitive to crop seedlings and embryos, soil treatment should be applied after covering the seeds before sowing, and try to improve the quality of sowing, and increase the amount of sowing appropriately. Some transplanted medicinal materials have large seedlings and young weeds, so a seedling belt (20-30 cm wide near the seedlings) can be used for concentrated application. Protective application of herbicides with poor selectivity or contact resistance is to spray or pour the liquid directly on the surface, try not to touch the seedlings of medicinal materials, and can not delay the application when the seedlings are vigorous and the green leaf area is large. If the stubble permits, measures such as dry land irrigation, paddy field moistening and mulching induction can be taken before the medicinal materials are planted to make the weeds germinate in advance, and then kill them with chemicals.