Adjusting sowing date to prevent and treat corn rough dwarf
Air Filter,Compressed Air Filter,Air Filter Regulator Haosheng Pneumatic Machinery Co., Ltd. , http://www.nb-tattoo.com
Maize dwarfism is a viral disease that is mainly transmitted by Laodelphax striatellus. The typical symptoms are dwarfing of plants, shortening of internodes, white waxy tear-shaped protrusions on the back of leaves, severe ear deformity, and lack of grain or grain reduction. Last year, the occurrence of fly-fly was large. It is expected that the number of fly hoppers this year will remain the same as last year, and even more than last year, the occurrence of corn rough dwarf disease will take priority. Prevention and treatment of the disease is the first choice of resistant varieties. At present, there are no real varieties resistant to corn rough dwarf disease, but some species are more resistant to disease. The more resistant varieties in production are Zhongyu No.4. The second is chemical control. Maize is a dry crop, and the effect of systemic absorption after application is poor. In addition, when spraying, the seedlings are small, and it is difficult for the medicine to be completely sprayed. Therefore, the control effect is not obvious. The third is to adjust the sowing date. Adjusting the sowing date of corn is the most effective method for controlling rough corn disease. The six-leaf corn is most susceptible to disease before the age of 6 leaves. The heaviest damage to corn is mainly a generation of adults of S. lauritus, and the peak period of damage is generally from the end of May to the beginning of June. Avoid planting from late April to mid-May. Spring maize can be sown in early April. Summer maize can be sown until June 10th to avoid the peak of the infection period of the corn plants.