Timing Matters When Spraying Pesticides: What Time of Day Is Best for Effective Spraying
SummaryThe timing of pesticide spraying varies with the seasons. For example, in the hot summer season, it is suitable to spray pesticides before 10 a.m. and after 4 p.m.; in the cool spring and autumn seasons, it is suitable to spray pesticides after 10 a.m. and before 2 p.m.; while in the cold winter and spring seasons, it is suitable to spray pesticides on a clear morning.
I. What Time of Day Is Best for Spraying Pesticides
The timing of pesticide spraying differs from season to season. For example, in the hot summer season, it is suitable to spray pesticides before 10 a.m. and after 4 p.m.; in the cool spring and autumn seasons, it is suitable to spray pesticides after 10 a.m. and before 2 p.m.; while in the cold winter and spring seasons, it is suitable to spray pesticides on a clear morning.
II. Precautions for Spraying Pesticides
1. Water quality
Do not use sewage to mix pesticides. Sewage contains many impurities, which can easily clog the spray nozzle when mixing pesticides, and can also destroy the suspension properties of the pesticide and cause precipitation. Well water also should not be used to mix pesticides. Well water contains relatively many minerals, and after these minerals are mixed with pesticides, they easily undergo chemical reactions, forming precipitates and reducing the pesticide's effectiveness.
2. Concentration
A pesticide with high concentration and high toxicity is not necessarily the one with the best effect. If the concentration of the selected pesticide is too high, it will not volatilize easily, resulting in pesticide residues on crops. After eating them, this will cause certain harm to the human body, and it will also damage the growth of crops, leading to reduced yields later, which will also bring economic losses.
3. Time limit
The safe time limits of pesticides of different strengths are the same. During this period, you must know how long the pesticide safety period is, and you must not spray pesticides before harvest. Generally, the residual effective period of highly toxic pesticides is about 60 days, and the residual effective period of high-efficiency, low-toxicity pesticides is about 15 days. Spraying pesticides before harvest can easily cause food poisoning.
4. Mixing
When using pesticides, they must be mixed with other agents for control in order to achieve the desired effect. However, when mixing, you must also pay close attention to the requirements and standards, and do not let 2 agents mix together and produce adverse reactions.
5. Droplets
Smaller droplets are not always better. The size of droplets is related to whether they can be better distributed, deposited and spread on the target. If the droplets are too small, they will float in the air and be difficult to deposit on the target, which will cause waste. If the droplets are too large, the amount of pesticide liquid rolling off onto the ground will also increase, which will also cause waste.
III. How to Use a Sprayer Tank to Apply Pesticides
1. Open the lid of the sprayer tank, add an appropriate amount of water, ensuring there is enough for one plot. Add pesticides in an appropriate ratio, and add pesticides in an amount depending on the size of one mu of land.
2. Carry the tank on your back. Put the tank on your back, pass the two straps over both shoulders and carry it on your shoulders. When spraying pesticides, use your left hand to press the pressure valve of the sprayer tank up and down to increase the pressure inside the tank, and hold the spray wand with your right hand to spray the vegetables.