The wheat midge larvae lurk in the husk of the wheat husk and suck the slaked grain slurry, causing pods and empty shells. Its body is very small, the hazard is very concealed, in recent years, the weight of the field should pay attention to timely prevention and treatment. Wheat midge worms mature in deep soil with mature larvae and can live for many years. When the soil temperature rises to about 7°C in 10cm spring (about the jointing stage of wheat), the larvae move to the surface of the soil. When the wheat enters the booting stage in mid-April, the larvae successively phlegm in 3cm of surface soil, and after the emergence of the adult in late April, On the surface, then lay eggs on the wheat ears, which is at the time of wheat heading and flowering. After hatching, the larvae drilled into the glume of the spikelets and bite into the epidermis to feed. In view of the characteristics that the midge only harm the ear grains in the wheat ear stage, the larvae, larvae, and adults before the heading of the wheat concentrate on the surface activity of the soil, it can be adopted to prevent and cure by spraying the soil in the booting stage and spraying in the flowering stage. (1) Spill soil. Apply 40% phoxim EC to 250 ml of water and 2 kg of water per acre, mix well with 20 kg of fine soil and spread it into the wheat field after the dew is dry. Then use a bamboo skewer or a string to shake the wheat strain to completely separate the soil. At the surface. When combined with irrigation, the effect is better. (2) Select acetamiprid, imidacloprid, phoxim, and pyrethroid sprays for spraying at the heading stage, pay attention to adding enough water to spray evenly, and choose to apply in the evening. Christmas Ornaments,Clear Christmas Ornaments,Plastic Christmas Ornaments,Christmas Ball Ornament COFCO HEBEI INTERNATIONAL TRADING CO., LTD. , https://www.cofcohb.com