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

   2. Strictly control the limited dosage. Herbicides should be used according to the specific soil quality, considering the farm microclimate, strictly according to the dose range, drug concentration and amount specified in the drug description.

   3. Mix the potion reasonably. When two or more herbicides are used together, it is necessary to strictly master the proportion of coordination, application time and spraying technology, and consider whether there is resistance or other side effects between each other. A small amount can be taken first for mixability test. If precipitation, flocculation, stratification, floatation and metamorphism occur, it means that its’ safety has changed, so it cannot be mixed. In addition, attention should also be paid to the synergistic function of the mixing agent. For example, the herbicidal efficacy of benthiocarb and propanil mixture should be greater than the sum of the herbicidal efficacy of each single agent, and the dosage of the mixing agent should be reduced (generally less than half of the dosage of each single agent) to avoid drug damage and ensure the safety of the medicinal materials.

   4. Be careful to the isolate and wind direction when applying pesticide, so as not to drift away and cause damage to the adjacent fields, and also to the effect on the next crop.

   5. Master the best time and technical operation essentials of herbicide application, preserve the pesticide properly, prevent the wrong use, and clean the spray appliance well, so as to avoid the misuse and harm to other crops.

   6. Pay attention to the influence of environmental conditions on herbicides, such as temperature, water content, light, soil type, organic matter content, soil tillage and soil preparation level, etc., those all can affect the herbicide's herbicidal effect directly or indirectly.

   7. Flexible use of medicine. The base of medicinal plants should be treated with herbicides under dew-free conditions, so as not to harm the stems and leaves in contact with the medicinal liquid. The soil treatment should cover the seed before sowing and apply the medicaments that are sensitive to the seed and germ, and improve the sowing quality as much as possible and increase the sowing quantity appropriately. Some transplanting medicine because of its seedling big, and weeds young, can take seedling belt (seedling near 20~30cm wide) concentration application.The application of protective application of herbicide with poor selectivity or touch is to spray the liquid directly or pour it on the surface without touching the seedlings, and cannot be delayed until the seedlings are vigorous and the green leaves are large. If the stubble is allowed, it can be used to irrigate the herbs in dry land, moisten the paddy field and induce the cover film before planting, so as to make the weeds germinate in advance and then kill them with medicine.