During the rainy season, the temperature rose and the rain increased. The growth of winter wheat was accelerated. However, the growing wheat also provided sufficient food for the pests, and some pests were already moving. Recently, the wheat larvae in Hebei are in a latent state. Due to the large amount of precipitation in the early stage and the high soil moisture, as the temperature rises, the larvae will soon be paralyzed and feathered. It is expected that this year will be more serious.
In fact, not only in Hebei, combined with meteorological conditions and analysis of pests, experts predict that the mites in the wheat areas of Tianjin and northern Henan will also occur this year. Among them, Anhui and southern Henan have reached the stage of adult emergence in late April , while Henan The northern, Shandong, Shanxi, and Hebei wheat areas will also reach the adult emergence period in May and mid- May . Here, experts remind farmers that the effective control period of wheat larvae is short, and it is difficult to prevent and control once spawning. It is currently the best period of prevention and control, and everyone must pay close attention to prevention and treatment.
In addition to the larvae, there is also a pest in the middle and late stages of wheat growth, which can not be taken lightly, that is, aphids. It is expected that this year's wheat aphids will be heavily biased in the Huanghuaihai wheat area, in the southwest, the middle and lower reaches of the Yangtze River and the northwestern part of the wheat. The district will occur moderately and it is necessary to strengthen prevention and control.
In the middle and late stages of wheat growth, not only will pests invade, but many diseases will also come in. Since April , the average temperature in most of the winter wheat area is lower than normal, and the precipitation is generally 30 to 50%. Due to the high humidity in the field, as the temperature rises, the meteorological conditions of high temperature and high humidity are likely to induce the development of wheat scab, stripe rust, powdery mildew and sheath blight. The occurrence of scab is biased, and attention should be paid to prevention and treatment.
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