Wheat has entered the jointing stage, neither pests nor diseases have been found, so spraying insecticides and fungicides at this time is not equivalent to wasting money?
Today, the little helper received such a question from a farmer, and the answer to the question was also discussed in the high-yield group of the little helper, and two points of view can be summarized, the first is indeed a waste of money, and the second is not a waste of money.
According to the little helper, many farmers have such a point of view, after seeing pests and diseases, they will go to spray, or the wheat in the field has been harmed by pests and diseases, and will only go to spray after showing symptoms.
If no pests and diseases are found in the field, and the wheat grows relatively normally, it is not only a waste of money but also a waste of time and energy to apply pesticides at this time.
There is a general view among such farmers that the best way to control pests and diseases is to prevent them in advance, and do not wait until the wheat shows symptoms before spraying pesticides, and then it will be too late to cause harm to wheat.
If you want to do a good job in the prevention and control of pests and diseases, even if you do not find pests and diseases, you can also have a good effect on pesticides in advance.
The above two points of view, if only from one of them, do have a certain amount of truth, but the starting point is different.
The little helper personally prefers the latter, that is, when it is time to spray, even if there are no pests and diseases in the field, they must be sprayed.
The first reason is that as mentioned above, spraying insecticides and fungicides in advance can play a good preventive role. After wheat enters the jointing stage, the occurrence of field pests and diseases is very rapid, especially in the case of a suitable field environment, 3-5 days, basically the entire plot can be harmed.
Wait until the wheat is yellowed due to pests and diseases, and then spray pesticides, the impact on wheat has been produced, more or less will affect the subsequent growth, therefore, it is recommended to spray in advance to prevent the occurrence of pests and diseases.
The second reason is that the harm of pests and diseases in the field may have just begun to occur, and the wheat has not yet shown the symptoms of harm, and some pests and diseases should not be found in the early stage.
For example, aphids are one of the common pests on wheat, and they like to hide under the leaves, but if they are only observed from above, without looking carefully at the back of the leaves, the aphids will not be easy to find.
When an aphid is found on the front of the leaf, the aphid may have been harmed for many days, and the leaf has turned yellow, affecting subsequent photosynthesis. Spraying insecticides in advance may be just enough to have a control effect.
According to the forecast and analysis of the National Agricultural Technology Center, a number of pests and diseases will be more likely to occur in 2024. Among them, the prevention and control of stripe rust, sheath blight and stem base rot were the focus at the jointing stage of wheat, and aphids and leaf mites were selected; the prevention of scab was mainly carried out at the heading and flowering stage of wheat, taking into account rust, powdery mildew and sucking worms; and the prevention and control of wheat ear aphid, powdery mildew and leaf rust were mainly carried out at the wheat filling stage.
Therefore, after wheat enters the jointing stage, the prevention and control of pests and diseases should be paid attention to. Some farmers spray the agent about three times, while others only spray once.
On the one hand, the cost will be taken into account, cheap pesticides, fungicides, may only cost a few yuan per acre, and more expensive pesticides, a mu of land to hit 20-30 yuan. On the other hand, some plots have better quality of land preparation before wheat sowing, and the eggs and germs in the plot are relatively less, which will reduce the number of spraying.
Based on the above content, the personal opinion of the little helper, after the wheat enters the jointing stage, it is not a waste of money to spray pesticides if no pests and diseases are found in the field, and it can play a good preventive role.
What do you think about this?