Sanqi weeding technology;
Panax notoginseng in seedling stage should be weeded frequently. Farmers generally use manual weeding, because pine leaves are scattered on the border when sowing, which is not conducive to the use of tools. Moreover, there is no fixed time and frequency limit for weeding. When you see grass in the field, you can pull it out manually. When using notoginseng herbicide to control weeds, farmers should pay attention to its application method to avoid phytotoxicity.
The application method of notoginseng herbicide:
1, spray method. This method is suitable for weeds that have grown, and it is also suitable for sealing outdoor soil. At present, most of the manual spraying equipment used is backward, which leads to uneven spraying. You should choose a nozzle with good material, durability and high pressure, and it is best to choose a fan nozzle. Before application, the spraying flow and walking speed should be measured, the spraying width should be determined, and the spraying amount and dosage should be accurately calculated. When spraying, the spraying pressure, the height of the nozzle from the ground and the walking speed should be fixed, and the height of the nozzle should not be lowered at will.
2. Poisonous sand method. This method is generally used for soil sealing of lawns. Using a closed herbicide, adding a certain amount of water, evenly mixing about 40 kilograms of fine sand, spreading it on the lawn, and washing it to the surface with sprinkler irrigation or rain water, a film with a thickness of 0.5- 1cm can be formed, and weeds will be killed when they contact the film. This method can control 40-60 days without weeding.
Notoginseng Herbicide Precautions:
1, use herbicides correctly. Herbicides are generally selective, and different herbicide varieties have different effects on crops and weeds. Therefore, in the process of using herbicides, appropriate herbicides should be selected according to the types of crops and weeds. The selected herbicide should be safe for the crops used and efficient for the weeds, otherwise it will have a serious impact on the crops.
2. Rational drug use during the application period. Herbicides should be selected according to different growth stages of crops, and the use of herbicides can be divided into two stages: pre-seedling and post-seedling, and herbicides should be selected appropriately according to different growth stages of crops.
3, master the application method. When using herbicides, we should master the appropriate methods of use. Don't increase the dosage at will, don't mix them, and clean up the instruments used. Otherwise, it is prone to herbicide damage.