Amaranth is a very common food in our daily lives. Whether it is a leek dumpling or a leek box, I believe many people are from snacks to big ones. However, if the leek is improperly managed, a devastating disease, rust, can occur.
First, the symptoms of rust
Amaranth rust mainly infects leaves and pedicels. It is a disease caused by fungi and is mainly transmitted by airflow. In the early stage of the disease, a yellow-shaped blister with a hammer-shaped or elliptical bulge is formed on the epidermis. A yellow halo is often formed around the lesion, and then expands into a large erythema. After the epidermis ruptures, an orange-yellow powder is scattered. Both sides of the leaf can be infected, and black vesicles appear on the leaves and stems in the later stage. When the disease is serious, the lesions fill the entire leaves, and the leaves of the whole amaranth turn yellow, and a lot of rust powder is emitted, which loses the edible value.
Second, prevention and control measures:
1. Selecting excellent varieties adapted to different periods: such as Beijing Dabaigen, Beijing Daqing Miao, Hanzhong Donglu, Shouguang Dugenhong, Shandong 9-1, etc., can reduce the incidence;
2. Reasonable rotation: Reasonable rotation to reduce the accumulation of bacterial sources. For the planting of large fields, fertile and organically-rich fields should be selected. Before planting, water should be poured and base fertilizer should be applied. For every mu, fertilized manure and other farmyard manure 3000 kg, 25% compound fertilizer 30 kg, and spraying disinfectant on the surface. The soil was disinfected by adding 800 times liquid of New High Fat Film.
3. Reasonable close planting; good ventilation and light transmission; timely drainage after rain to prevent excessive humidity in the field; using formula fertilization technology, applying more phosphorus and potassium fertilizer to improve disease resistance, and spraying a new high-lipid film 800 times to form a layer The protective film prevents the bacteria from invading by airflow. And in the growing stage of the leek, the strong stems can be sprayed, which can make the stems of the plants strong, the leaves are thick, the leaves are fresh, the plants are flourishing, and the natural taste is strong.
4. When harvesting, cut down as low as possible, and pay attention to clean the noodles. After harvesting, spray 45% sulfur suspending agent 400 times liquid to disinfect, and spray 800 times of new high-lipid film to enhance the efficacy and improve the active ingredient utilization. Rate and consolidate the control effect.
5, in the early stage of the disease, spray 25% propiconazole EC 3000 times solution or 25% tebuconazole water emulsion 3000 times solution, 30% diphenyl ether A · propane ring EC 3000 times solution, 15% triazolone wettable powder 2000 times Liquid, once every 10 days or so, 2 times.
6, the site of heavy disease, the drug can not be prevented, it is best to cut from the ground rhizome, and then spray the fungicide protection in the remaining roots, and strengthen management, increase fertilizer, accelerate the growth of leek, make the leek re- Get up.
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