Spring ploughing soon, wheat herbicide flying anti-dosing precautions

After the Spring Festival, temperatures begin to rise, and farmers start preparing for spring plowing. In many regions, wheat enters its rejuvenation phase from late February to early March. If weeds were not removed before winter, it's crucial to target the best time for weed control now.

Applying herbicides under the right conditions is essential for effective weed management. Most herbicides are temperature-sensitive, so they should not be applied when temperatures drop below 6°C. The best time for application is between 10:00 AM and 3:00 PM, ensuring that temperatures remain above this threshold both before and after spraying.

When using plant protection drones for herbicide application, it's important to avoid windy conditions. Wind can cause uneven distribution of the fine mist, leading to over-application in some areas and under-application in others. Additionally, wind may carry the herbicide mist to nearby sensitive crops, causing unintended damage. Since ultra-low-volume sprays from drones are prone to drift, it's best to avoid spraying on windy days.

If the soil is dry during herbicide application, increasing water volume is recommended to ensure proper coverage. However, if the field is already wet, this may reduce the effectiveness of the herbicide.

It’s also important not to apply herbicides to sick wheat plants. Recent years have seen an increase in diseases such as wheat sheath blight, root rot, and other soil-borne infections. Before spraying, check the health of your wheat seedlings. If the plants are diseased, it's better to delay herbicide application to avoid further stress on the crop.

Another key point is the correct dilution process. Some operators try to save costs by directly pouring large quantities of herbicide into the main tank without proper mixing. This method is unscientific, as most herbicides come with additives that help with penetration and efficacy. These additives are often thicker and may settle at the bottom of the tank if not properly mixed. This can lead to uneven distribution and ineffective results.

Two potential issues can arise from improper dilution:

• Some herbicides may remain undissolved at the bottom of the tank, resulting in wasted product.
• The concentration of the herbicide may be too low initially and too high later, potentially causing phytotoxicity to the wheat.

To avoid these problems, always follow the second-dilution method. Thoroughly mix the solution before transferring it to the spray tank to ensure even distribution of the active ingredients.

Overuse of herbicides should also be avoided. Spraying in thick grass or trying to use up every drop of the solution can lead to excessive concentrations, which may harm the wheat. While herbicides are generally safe at recommended rates, overdosing can overwhelm the plant’s ability to metabolize the chemicals, resulting in damage.

Finally, it's important to understand that some herbicides may cause temporary yellowing of the wheat leaves. This is a normal reaction and usually resolves on its own as the plant recovers. This phenomenon does not reduce yield; instead, it helps regulate excessive vegetative growth, promoting better reproductive development. There's no need to worry about this effect.

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