Herbicides play an important role in modern agricultural production, but when using herbicides, they are often affected by rain, resulting in poor herbicide effectiveness or even ineffectiveness. So, how many hours after the herbicide rains does it affect the efficacy of the herbicide?
First of all, we need to understand the principle of action of the herbicide. Herbicides are selective agents that kill or inhibit the growth of weeds by inhibiting their photosynthesis, interfering with the synthesis of plant hormones, etc. When the herbicide is sprayed on a weed, the agent attaches to the weed blades and works gradually.
However, the impact of rain on herbicides is a factor that cannot be ignored. Rain can wash away the agent, making it ineffective for it to function properly. In addition, rainwater can carry chemicals into the soil, causing contamination of soil and groundwater.
So, how many hours after the herbicide rains does it affect the efficacy of the herbicide? It depends on a variety of factors such as the type of agent, weather conditions, soil moisture, etc. Generally speaking, if the agent is able to dry within a few hours, then rain will not have much effect on the efficacy of the medicine. If it rains before the agent is dry, the agent is likely to be washed away by the rain, resulting in poor weeding effect.
In order to ensure the efficacy of herbicides, it is recommended to choose systemic conductive agents when choosing herbicides, which can be absorbed by weeds and conducted in the body, thereby killing the rhizomes of weeds. In addition, herbicides with a longer duration of action can be selected, which can reduce the number of resprays and man-hours.
In addition to choosing the right herbicide, pay attention to the weather conditions when applying. Pay attention to the weather forecast before applying the herbicide and avoid applying the herbicide on days when it is about to rain. At the same time, rain washing should also be avoided for a period of time after application to ensure the weeding effect.
In summary, the effect of rain in the first few hours after the herbicide does not affect the effectiveness of the herbicide depends on a variety of factors. To ensure the effectiveness of weeding, it is advisable to choose the right herbicide and pay attention to the weather conditions to avoid applying herbicides on days when it is about to rain. At the same time, drought should be maintained for a period of time after application to ensure the dryness of the pesticide and the exertion of the efficacy.