Tea leaf spot

Symptoms are also called algae disease. Distributed in tea areas throughout the country, mainly damage the middle and lower old leaves. The leaves of the old leaves are infected and the back of the leaves can produce yellow-brown needles with round lesions or cruciform spots. They gradually develop from radial to irregular to gray-green to yellow-brown lesions of a size of 0.5-1. .0mm, thin strips of felt-like lesions were visible on the lesions, with round or near-circular lesions at the late stage; slightly elevated, dark brown, smooth surface, fibrous texture, and irregular edges.

Transmission routes and onset conditions Chlorella is overwintering with vegetative bodies in diseased leaves. Under conditions of high humidity in late spring, zoosporangium and zoospores are generated. They swim in the water and germinate. They invade from the stratum corneum of the leaves and spread between the epidermal cells and the stratum corneum of the leaves. Zoospores are produced and spread by wind and rain to spread the disease. The pathogenic algae like high temperature, but the parasitic is weak, and many parasitic on the weak tea tree. Tea garden shade, high humidity, or moisture retention favors the onset.

Prevention methods (1) When setting up a new tea garden, it is necessary to pay attention to the selection of high-drying plots; after the rain or when the groundwater level is high, pay attention to drainage and prevent moisture retention. (2) Remove stale branches and diseased branches in a timely manner to improve the ventilation and light transmission conditions in the tea garden. (3) Appropriate application of phosphorus and potassium fertilizers to improve tea plant disease resistance. (4) Spraying 0.6% to 0.7% Lime half-Bordeaux Bordeaux fluid or 0.5% more than 96% CuSO4 fluid or 30% Green Depo suspension 400X or 12% green milk at the beginning of early spring or late autumn onset Copper EC 600 times.

Ulcers is commonly known as gastric ulcer and duodenal ulcer, the formation of ulcers is closely related with gastric acid or pepsin digestion. Ulcer disease is a chronic disease, its seizures were cyclical, episodes and remission of alternating appear, and the onset of abdominal pain has a certain rule. The main cause of ulcers include: 1. Helicobacter pylori infection 2. Bad diet 3. Mental factors 4. Drug stimulation. Many patients with gastric ulcer who have taken non-steroidal anti-inflammatory drug history, these drugs will stimulate our gastric mucosa, causing damage, then it will cause ulcer disease over time. The current anti-ulcer drug is mainly focused on reducing gastric acid and enhance the protective effect of gastric mucosa. In recent years,the research and development of anti-ulcer drug progress is faster, effective drugs have been listed, sales are also rising.

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