Wheat thicket dwarf disease

Wheat rosette dwarf disease is a viral disease transmitted by the virus vector gray planthopper. There are two peaks in the infection of gray planthopper on wheat: the first peak is after the emergence of wheat seedlings, and the second peak is after the wheat turns green. With the gradual rise of temperature, the overwintering generation of gray planthopper begins to feed on wheat seedlings and transmit the virus. 2. Control methods (1) thoroughly remove the weeds in and around the wheat field when the wheat turns green, and eliminate the suitable living environment of gray planthopper, so as to reduce the source of virus-transmitting insects. (2) pour back green water at the right time. Pouring green water can kill gray planthopper and reduce the source of virus-transmitting insects. (3) Prevention and control by spraying. Spray control should be applied when the temperature is stable at 5 ℃ in spring. You can use 1000 times of omethoate EC or 1000 times of phoxim, spray 50-75 kg per mu, spray once every 5-7 days, and spray twice. Spray within 5 meters of the wheat field when spraying. Close to roadsides, ditches, land, the edge of the ground should pay more attention to prevention and control.