Frequent diseases must be prevented first

This year, wheat leaf rust has occurred more severely in individual plots in some areas.
The conditions of prevention and non-prevention, control period, frequency of control and other conditions are different, and the occurrence of the disease has obvious differences
.
For example, an investigation was conducted in two adjacent wheat fields in a village in Xuchang City, Henan Province.
The differences between the fields are very obvious.
From a distance, there is one yellow and one green.
The leaves of the diseased field are covered with pathogenic spores, and the lower leaves have dried up in advance.
The upper flag leaves have been infested by pathogens causing yellow and green colors, which have a greater impact on the wheat at the filling stage
.
The adjacent field has no disease, the plants are beautiful, the upper and lower leaves are not yellow and dry, and the growth is good
.
When questioning the two farmers, they learned that their sowing period, planted varieties, control times, and chemicals are almost the same, but the only difference is that the control time and control concepts are very different
.
Farmers in the non-infected fields said that they must first know that they should be sprayed in advance to prevent the disease before they occur.
During the jointing stage of wheat spiders, they added fungicides for a control, and then they sprayed them in a timely manner at the beginning of the disease
.
Although the farmers in the affected plots also carried out two disease prevention and control, but the prevention and control period was when the wheat leaves were yellow and the wheat leaves were yellowed.
The effect was very poor, and it was unable to save the yellow leaves.

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Therefore, we remind farmers that we must overcome the idea of ​​"emphasizing insects and light diseases", strengthen the understanding of disease prevention and control, and prevent common diseases before they occur
.