How to control brown spot in grape planting
Symptoms: Brown spot is caused by Pseudocercospora grape infection, which mainly damages grape leaves. At the initial stage of the infection, the infection spot shows light brown and irregular angular spots, and the spot gradually expands, up to 1 cm in diameter. The spot changes from light brown to brown, and then turns to reddish brown, the periphery is yellowish green, and in severe cases, several spots are connected into large spots, the edges are clear, the back of the leaves is blurred, and the disease part dies in the later stage. Grayish brown mildew occurs when it is rainy or humid.
Control methods: ① thoroughly remove litter to reduce the source of the disease. Spraying 3-5-degree stone-sulfur mixture before germination; ② spraying control: in areas with serious disease, 200 times Bordeaux can be sprayed once in June, 500-fold carbendazim, 600-800-fold chlorothalonil or 800-800-fold thiophanil can be sprayed alternately every 10 to 15 days. 65% mancozeb is harmful to some grape fruits, especially in the north, and the concentration should be 1000-1200 times; ③ should be fertilized reasonably and pruned scientifically. Increase the application of multi-element compound fertilizer. Enhance the tree potential, improve disease resistance, scientific retention of branches, timely heart pruning, ventilation and light on all sides.
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Control of Myrica rubra
There is a great difference between male and female morphology of adult bayberry coir moth. The male adult is 15-20 mm long, with a wingspan of 30-35 mm, dark brown, with 3-5 translucent markings near the outer edge of the forewing and brown hind wings. The female adult is wingless, shaped like a maggot, about 26 mm long and has a dirty white body.
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Prevention and treatment of Snake Eye Disease of growing Strawberry
With the arrival of autumn, the temperature dropped, Rain Water increased and the light was insufficient. Snake eye disease began to occur frequently in some strawberry producing areas, and the incidence of some fields reached more than 50%, which has seriously affected the growth of strawberries. The main occurrence and control techniques are introduced as follows: first, diseases.
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