Prevention of apple black spot disease bagging management is the focus
After apple bagging, the main reason for the occurrence of black spot disease on the fruit surface was that the bag was not effectively controlled before the bag was placed on the bag; the second was that after the bagging, there was much rain and the technology of the bagging was not closed, resulting in the bag's Some places enter the bacteria rain, and finally the bacteria invade the fruit surface in a high-temperature, high-humidity environment inside the bag. Black spot disease is distinguished from the damage of the whitefly on the fruit, the damage of the green-letter tick, and bitter pit disease and pox spot disease. Its pathogens are overwintering on diseased fruits and diseased leaves, and young fruit 10 to 30 days after flowering are easily infested. The incubation period is 40 to 50 days. The germs were born on apple flower residues and infested under high temperature and humidity conditions. After bagging, the fruit parts can be infiltrated through the lenticels. The degree of occurrence and climatic conditions, orchard environment, orchard comprehensive management level, and fruit bag type And performance, bagging and other factors are closely related.
First, the symptoms
At the early stage of black spot disease, needle-shaped black spots appear around the fruit pods, and the diameter of the black spots gradually expands. The dark spots are dark brown to dark brown with the lenticel as the center. Some of them are like the tip size, and some have a diameter of 5 About a millimeter, the late lesion expands into an irregular shape, mostly 1 to 6 mm in size, slightly concave, lesions occur only in the fruit surface epidermis, only slightly deep into the shallow flesh, taste no bitter or slightly bitter taste, no Can cause flesh ulcers. Similar to the calcium deficiency caused by pox spot disease, the difference is that pox spot disease can occur anywhere on the fruit surface, black spots occur as a large spot. Bagging black spot disease occurs shortly after bagging, and bitter pit disease occurs more clearly in the later stages of fruit development.
Second, the incidence conditions
1. Environmental conditions: mainly high temperature and humidity, poor ventilation, poor light transmission, weak trees, and less incidence of bagging, and bagging apple black spot disease mainly occurs in the rainy season from June to August each year, and occurs frequently. In Yushu orchards and trees where girdling, organic fertilizer is less, and nitrogen and calcium are less, trees are debilitated. The varieties are severely affected by Jin Shuai and Luguang, followed by Red Fuji, Red Star, and Guoguang varieties.
2, spraying conditions: mainly in the wrong use of drugs or spraying is not timely and thoughtful, and some medication after the period of bagging too long, the number of medication is less, after bagging is not enough attention to spraying.
3, bagging technology: bagging is the key to improving the quality of fruit inside and outside, the quality of the bag is essential. A reputable factory is guaranteed to have a quality fruit bag produced by a small factory that does not pass technology. The bagged fruit is under the conditions of high humidity, poor ventilation, high temperature, and tender fruit, especially in the area where the water is easily accumulated. The humidity inside and outside the bag is relatively large and there is no effective drug application. Paper bag or film bag, the humidity inside and outside the bag after the rain continued to be large, and in the case of no effective drug spray, whether the paper bag or film bag, the water in the bag after raining can not be quickly eliminated, the paper bag is not dry after a long time or When the bottom outlet of the bag is not open, it will increase the occurrence of black spot disease.
Third, prevention and control measures
1. Strengthen the tree, improve ventilation and light transmission
The main purpose is to increase the organic fertilizer, enhance the disease resistance of the tree, and trim the pruning, open the light path, avoid excessive girdling, increase the use of foliar calcium fertilizer and boron fertilizer, and increase the cell division and activity by spraying more. Pay attention to the underground fertilizer and watering before flowering. Bags that are not suitable for bagging should not be forced to be bagged, and must reach the tree required for bagging in order to carry fruit bagging.
2, strict bagging before spraying
Generally combined with the use of internal suction and protective agent, bagging time to avoid the high temperature at noon, in the morning 8 to 11 o'clock and 2 to 5 o'clock in the afternoon as well, and in the fog after the spray dry after the timely bagging. The last fruit of bagging should be sprayed 3 to 4 times, and the bagging time should not exceed the potency of the drug used.
3, according to technical specifications bagging
First, choose a good quality fruit bag, and then see if it needs to be immersed in liquid, and then continue to carry out the operation in the order of holding bags, supporting bags, pushing fruit, closing bags, and sealing, focusing on the downward pressure on the tying port, and the vent To open.
Keywords---Fish Curd, Side Dish, Sauce, Pot, Boil
Ingredients:
Fish Curd, Side Dish(Dried Day Lily, Rice Noodle), Tomato Sauce
Directions:
1. Add 500ml of water along with tomato sauce pouch into a pot to boil.
2. Add the side dish into the pot and wait for 2-3 minutes
3. Add the fish curd into the boiling soup until they float(1-2minutes). Then pour the soup and the fish curd into a bowl before serving
Fish Ball ,Fish Cake ,Mushroom Fish Tofu,Fish Paste Tofu
Guangzhou Luxe Seafood Enterprises Ltd. , https://www.seafoodluxe.com