In recent years, with the increase of the area of ​​spring-sown corn, the disease of maize dwarf mosaic virus has also increased, which has become the main disease of spring-sown corn.
First, symptom recognition
Corn dwarf mosaic virus disease can be ill during the whole growth period of corn, especially in the seedling stage. At the trifoliate stage of the corn, there are many elliptical chlorotic dots or markings in the veins at the base of the heart leaf. The veins are arranged along the veins to continue the length of the strip. As the disease progresses, the symptoms gradually spread to the whole leaf. There are several chlorotic stripes with different lengths and shades between the thick veins. The interlobular mesophyll loses green and turns yellow, and the veins remain green, thus forming obvious yellow-green stripes. As the corn grows, the condition becomes more serious, the chlorophyll of the diseased leaves decreases, the leaf color turns yellow, and the purple-red stripes gradually appear from the leaf leaf margins. Finally, the disease is dry, the diseased plant is weak and small, the growth is slow, and the plant height is often less than the healthy plant. 1/2.
Second, prevention measures
1. Select resistant varieties, coated seeds and pesticides for seed dressing.
The disease-resistant inbred lines and hybrids are selected, and the coated seeds can be used to control both viral diseases and other corn diseases. It is very effective to mix 50 kg with furandan suspension 2 and 100 ml.
2. Planting at the right time to strengthen field management.
The planting should be completed before April 20th to avoid the encounter time between the sensitive period of the susceptible seedlings and the peak period of the infected insects, reduce the incidence, clear the weeds in the field, lower the aphids, the base of the gray planthopper, and timely destroy the fields.
3, treatment of disease prevention.
Eliminate the poisonous aphids in time, and eliminate the aphids in time in the early stage of the aphids, especially pay attention to the prevention and control of seedlings.
4, chemical control.
(1) Use 3.85% virus Baker 600-700 times solution + 0.3% potassium dihydrogen phosphate.
(2) Anti-toxin aqueous solution 500 times solution + 0.3% potassium dihydrogen phosphate.
Disease Test Adenovirus Rapid Test Kit
Pathological Analysis Equipments
Disease Test Adenovirus Rapid Test Kit
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