First, symptom recognition
The disease mainly damages the leaves and calyx. On the leaves, there were primary yellowish spots, oval lesions after enlargement, dark brown edges, yellow halos on the periphery, and the central part changed from yellow brown to grayish white. In a high-humidity environment, a mild red mold layer grows and when it is dry, the lesions break. In the calyx, its symptoms are similar to those on the leaves. Sometimes it is connected to several lesions and it is more than 10 centimeters long. The affected parts are often sunken and the pink moldy material grows on the surface. After the flower bud has been killed, if the number of lesions is large, it will affect the growth of buds and the formation of flower buds, and even cause the bud to break and die.
Second, the pathogen
The disease is caused by fungal infection. The optimum temperature for the growth and development of pathogens is 15-20°C. In addition to damage to yellow flower larvae, germs also parasitic on barley, cotton, broad bean and other crops cause root rot, also parasitic on millet and cause seed rot. .
Third, the incidence of the law
The pathogens mainly overwintered with mycelium on dead leaves. The confinement spores spread by airflow, germinating when they produce germ tubes, invading leaves and flower seedlings. The incubation period is 3 days, and 6-7 days later, conidia are produced on the lesions to re-infect. After planting for too long, the vegetable strain becomes old, the compensation ability after onset is poor, and the accumulation of germs is also numerous, so the disease is also serious. Partial application of nitrogen fertilizer, leaves growing soft, extended maturity, increase the incidence. Viscous and heavy soil, poor water permeability, poor growth and development of vegetable roots, reduced resistance to disease. Extensive management or no cultivating and weeding is also susceptible to disease.
Fourth, control methods
1. Disease-resistant varieties should be selected in areas with severe disease. Such as fine leaf flowers, heavy flowers, winter flowers and so on.
2. Strengthen field management and cultivate seedlings. Reasonable fertilization, more application of farmyard manure, and deep excavation of soil, so that seedlings are robust; remove the sick on the ground, picking yellow flowers after cutting seedlings, burned in a timely manner; do a good job in trench drainage work to prevent alum dark stain; spring a lot of new leaves When it happens, less or no quick-acting nitrogen fertilizer is applied to prevent the leaves from growing too fast and the tissue is too young to be easily infected by pathogens.
3. Spray pesticides during the onset. The commonly used agents are: 1% Bordeaux; 75% chlorothalonil wettable powder 1000 times; 50% carbendazim wettable powder 1000 times. Once every 10 miles, a total of 2-3 times.
With the improvement of living standards, snack foods have been deeply loved by the masses of the people. When you walk into the supermarket, you will see snacks such as preserved fruit, sour horns, potato chips, almonds, pistachios, fish fillets, dried meat, and spiced fried meat. Snack foods are gradually upgrading to become the daily necessities of the people. As the economy develops and the level of consumption increases, consumers' demand for the quantity and quality of snack foods continues to grow.
Fish Snacks are ready to eat in a bag. They are delicious. In life, they are a kind of snacks that people often eat. They are diverse and rich in nutrients.
Crab Stick,Shrimp Chips,Shrimp Snacks,Seafood Snacks
Hangzhou Aiyomi food co.,LTD , https://www.aiyomisnacks.com