The Occurrence and Comprehensive Prevention of Pear Tree Silver Leaf Disease

The occurrence and comprehensive prevention and control of pear silver leaf disease In recent years, silver leaf disease is common in pear trees in some areas of the city. The disease is a devastating fungal disease. When the disease is severe, the pear garden can be destroyed within a few years. The diseased pear trees weakened. The output is reduced, and the severe disease tree will die after 2-3 years, which will seriously affect pear production. First, the symptoms of forging leaf injury not only damage pear trees, but also harm peach, apple, jujube and other fruit trees. The symptoms of the affected fruit trees are mainly on the leaves and branches. In the role of bacteria under the action of leaf epidermis and mesophyll tissue separation, the gap is full of air, due to the reflection of light, the leaves appear pale gray, slightly silvery white sheen, it is called the silver leaf disease; branch symptoms mainly in the xylem, the bacteria in the disease The xylem of the tree can spread upwards to 1-2 years old, making the xylem of the diseased part brown, dry and smelly, but the tissue does not rot and can spread down to the roots, causing more rot in the roots. Damaged fruit trees often show symptoms from one branch first, and then gradually increase until the entire plant becomes ill. The diseased trees are slow to germinate, and the leaves and the fruit become smaller. The sick and dead tree can produce a purple-gray fruiting body that is repetitive, but the fruiting body does not occur in the undead tree. Second, the occurrence of regular silver leaf disease pathogens for the basidiomycotina, Lactobacillus non-brown bacteria purple purple leather bacteria, the optimum temperature zone is 26 °C. During the winter, wintering occurs on the stem xylem of the diseased branch or on the stem of the dead tree. Bacillus spp. spreads with air currents and rainwater, and when the condition is appropriate, invades infected plants from the wound. In general, from May to June and September to October, the tree is rich in nutrients. It is the optimum period for the infection of bacteria, and it is also the key period for prevention and treatment. It takes 1-2 years for the infected fruit trees to reach the symptoms from the infected bacteria, which brings certain difficulties to the prevention and treatment work. Therefore, preventive measures must be taken for the diseased fruit trees. III. Comprehensive prevention and control 1. Ecological control of agriculture, strengthening orchard management 1. Increase the use of organic fertilizers, improve the soil, increase the tree vigor, and improve the disease resistance of trees. 2 Flat and low-lying orchards, strengthen drainage facilities, prevent water accumulation in the park, and poor growth of fruit trees. 3 protect the tree; prevent other branches and diseases, reduce wounds, trim should be light. In the wards, it is not advisable to change the species. 4 For denser orchards, appropriate transplants should be made to achieve a reasonable density and avoid friction between wounds. 2. Manually control 1 pair of severe diseased trees and dead trees. Roots should be dug, roots must be rooted, brought out of the orchard and burned, and diseased holes are disinfected with quicklime. 2 Clear up the orchard, eliminate stubble, diseased leaves and diseased roots and remove the source of the disease. 3 After excavating the soil of the diseased plants, other non-rosaceous families were replanted and the orchards were reformed. 3, chemical control 1 diseased shoots on the branch with fewer branches to take the broken branch therapy, that saw off the diseased branches, pay attention to the xylem part of the discoloration of all saw clean, with Bordeaux pulp or 10 Baume degree of lime sulfur or 20% Shi Bao Ling 1000 times liquid smear wound to inhibit the spread of bacteria. 2 Lightly infected plants were taken to be rooted, then sprayed with 20% carbendazim 3000 times solution and rooted at the same time, or perforated with sulfuric acid-octahydroxy-quinoline (this medicine needs to be imported and expensive). 3 Prior to the germination of the fruit trees, the application of 50 grams of bactericide or sub-microbial fungicide per acre of soil had obvious control and preventive effects.

Canned Tuna is an important variety of canned fish, canned tuna processing is the main species of albacore tuna and yellow-fin tuna, canned tuna has many varieties, including Canned Tuna in Brine, Canned Tuna in Tomato Sauce, Canned Tuna In Sunflower Oil, Canned Tuna in Vegetable Oil. In addition the tuna muscle more sulfur-containing protein, generally use the anti sulfur acid tin coating as a whole and canned container.

Canned fishes are made in our sub company-Zhejiang XingWang LongSheng Food Co.,Ltd. The company now has two factories(can branch and loin branch) and the main production equipment are: 3 processing capacity of 60 mt(materials)/day canned fish production lines; 4 processing capacity of 50 mt(materials)/day frozen cooked tuna loin production lines; 3 freezing capacity of 80 mt/day freezer rooms and 1 disposing capacity of 1000m³/day waste-water treatment plant. All the key equipment of every plant are imported from Thailand or Japan.

We will always strive to create more delicious, natural and safer marine health food.

 

Canned Tuna

Canned Tuna,Canned Tuna In Brine,Canned Tuna In Sunflower Oil,Canned Tuna In Vegetable Oil

TAIZHOU XINGWANG AQUATIC PRODUCT CO., LTD. , http://www.tzxingwang.com