The spraying of special herbicides after the seedlings of red peony (white peony and peony) is skillful, and the application time is not right and the dosage is not accurate, which will have a great impact on it. It can be damaged by pesticides and affect short-term growth, and seriously affect the root system, which is not conducive to the growth of the next year and beyond. We should master the best spraying time of special herbicides after the seedlings of red peony (white peony and peony), and then master the dosage according to the time, so that we can use the medicine in a targeted manner to achieve the best effect with the minimum dosage, so that the impact of red peony is minimized or even no.
Due to the effect of occlusive herbicides, there are relatively few weeds about a month after the emergence of red peony. We set the time of the first application to be one month after the emergence of red peony seedlings, during this period, due to the influence of spring temperature, the leaves of peony are still tender, and the weeds are not too high. However, if there are many types and quantities of weeds, then it is time to do the first weeding operation. On the basis of the standard dosage of our herbicide, the dosage is reduced by one-third, so that the weeds can be killed, and the leaves of red peony will not be affected. Because, if the normal amount is used at this time, the red peony leaves will be stimulated and deformed because they are too delicate. In addition, if the weeds in this season are not complete, they can be sprayed according to the type of weeds, and a formula can be reduced, which is safer and more economical for red peony. For example, the weeds that generally come out first are gray cabbage, artemisia seeds, spiny cabbage, Xanthium fungus, camellia, etc., which can be sprayed with a formula containing No. 1 and No. 4, according to one-third of the normal dosage. In the east of Hulunbuir Ling, Heilongjiang.
3. In the fourth accumulation temperate zone, the spraying time at this time is about around June 5. For the first spraying, if it is the fifth or sixth accumulated temperate zone in Lingbei or Heilongjiang, it needs to be around June 25.
If the effect of the occlusive herbicide is satisfactory in the early stage, or the number of weeds is small, it is not necessary to carry out the first weeding, and the second post-seedling spraying is carried out according to the situation in the later stage.
The second spraying of post-emergence herbicides, most of which are rain-concentrated and rain-heavy seasons, need to add additives, such as silicones. Then the dosage is adjusted according to the size of the weed and the growth of the red peony. For example, when the wax layer of red peony leaves is basically formed, the resistance to pesticides is improved, and the weeds grow rapidly due to the effect of temperature and rain. At this time, the dosage can be increased by one-third on the basis of the standard dosage. If there are many kinds of weeds, such as: gray cabbage, artemisia seeds, spiny cabbage, Xanthium, camellia, curly knotweed, amaranth, wild alfalfa, purslane, sorrel leaf knotweed, etc., you can use the full formula (No. 1, 2, 3, 4).
In the whole growing season, there is a big difference in the growth of each stage, such as the difference in the growth of red peony, the difference in the growth of weeds, and the dosage will definitely not be a dose, such as those sold online, a compound preparation to cope with the rapid growth season, that is unrealistic. The increase or decrease of the optimal dosage and type of drugs should be prepared on the spot, and targeted formulas should be made according to local conditions, which will be more effective, reduce to the minimum, and then in the case of incomplete weeds, subtract unnecessary formulas, and save money for precise medication.