Chestnut powdery mildew belongs to fungus Aspergillus subsplenium Pulmonaria, a variety of species, but the main damage of chestnut powder ball powder powdery powder and powdery powder fork powder two species. The former is parasitized on the back of the leaf and is referred to as powdery mildew. The diameter of the closed cystic shell is 214-250 μm. It has a needle-like adventitious filament and contains as many as 2 to 4 ascospores. The latter is parasitized on the front of the leaf and is referred to as powdery mildew. The diameter of the closed capsular shell is 84 to 168 μm, and the attached wire is bifurcated. Wide distribution, heavy occurrence, where the chestnut production areas have occurred, especially in the occurrence of seedlings and young shoots up to the most victims, the victims of young shoots and yellow leaves dry coke, severe seedlings can cause death. In addition to damaging chestnuts, it also harms forestry techniques such as tussock and ridges. The "powdery disease" of many kinds of fruit trees is currently in its peak period, and it is generally harmful.
Damage symptoms
The main damage leaves, shoots and buds. After the leaves are infected, yellow spots appear on the leaves or leaves, followed by a large amount of white powder. When the sky is fine and dry, the white powder is flying and the damaged leaves are distorted and deformed. The damaged young shoots also produce white powder, which affects lignification and is severely deformed.
The law of incidence
The pathogens overwinter on the tip of the diseased leaf with the closed capsule shell, and ascospores are released between April and May the following year to infect new shoots. During the whole growing season, the germs can continuously produce conidia as long as new shoots occur. The weather is warm, the weather is clear, the sun is dry, the Yuli spreads and the development takes place; the rainy season comes after the air turns wet and turns light, nursery seedlings and saplings are the most severe, and trees older than ten years are lighter.
Control methods
1. Qingyuan disinfection in the winter to eliminate the leaves in the garden, combined with pruning to cut off the serious deformed branches, concentrated burned, sprayed on the tree 3 to 5 degrees lime sulfur, culling of overwintering bacteria, in order to reduce the year after the pathogen. When the spring is about to sprout, spray 200 times equal amount of Bordeaux mixture for prevention.
2. Cut off the diseased plants. The diseased plants were found in the morning when the dew was not dry and the white powder was not easy to fly. The diseased areas were cut off from below 6 buds and burned in order to avoid spore transmission.
3. Spraying pesticides From the beginning of onset, spray 600-800 times 20% triadimefon EC or 25% powder every 10 days or 200 times 4% agricultural anti-120 powder.
In addition, the powdery mildew of apple, hawthorn, peach, plum, grape, citrus, walnut, mango, litchi and other fruit trees, although not the same pathogen of chestnut, are the same whitefly disease, close relatives, occurrence time, damage location, damage Symptoms, damages, etc., are also similar and can be controlled with the same method.
Bale Machine is used for silage and grass bale. It`s popular in small farms for packing small silage bales, the weight of silage bales are usually 70-90kgs..
Bale Machine is composed of conveyer belt which can deliver silage to the central bale box, central bale box which bale the bulk silage into round bale, and bale part which rotates fast and pack the round bale with Silage Wrap.
There`re two kinds of bale machine: automatic and semi-automatic ones. For automatic machine, worker just put silage on the conveyer belt, and it can pack itself. For semi-automatic machine, worker has to help it cut the rope, open and close the door of bale box, and put it down to the ground.
Bale Machine,Automatic Bale Machine,Small Size Bale Machine,Multiple Layers Bale Machine
Zibo Maoyang Industry and Trading Co.,ltd , http://www.mysilage.com