The appearance is tan, and the cork is red-brown at the flaking; there are intermittent stripes on the branches, nodules are enlarged, and the shape is like a bead. Most of the hard and delicate roots and fibrous roots are born, and some surfaces are smooth and smooth, such as stalks. It is commonly known as "crossing the river branches" or "crossing bridges"; there are brown scales on the upper part, and there are residual stems or petioles that have not been cleaned at the top. The quality is firm and hard, the section is irregular, the skin is dark brown, the wood is golden, the rays are cracked, the central pith is red and yellow, and occasionally hollow. Odorless, very bitter taste, chewing saliva can be dyed red and yellow. It is better to use fat, beaded, solid, red-yellow, no residual stems and fibrous roots.
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Cucumber wilt disease prevention and control method
Cucumber wilt disease is also known as vine disease and wilting disease. Cucumber can be from the seedlings to the adult stage, but the incidence of the most melon period. Effective prevention methods are as follows: 1. Implement rotation. The rotation time is 3-5 years or more. 2, choose resistant varieties. For example, Jinza No.1, No.2 and Jinyan No.5, No.6, and No.7. 3, cultivation of virus-free seedlings. New nursery beds can be used to grow seedling-free soil. If old seedbeds are used, 50% carbendazim can be used, 8 grams per square meter, plus 10-15 kilograms of semi-dried fine soil, and mix well and apply 2/3 of the medicinal soil to the seedbed soil. , 1/3 of the soil as cover soil, not thick enough to be screened after the disease-free soil. 4, rational fertilization. Apply organic fertilizer and increase phosphorus and potassium fertilizers. 5, irrigation and control. In the early stage of disease, use 50% carbendazim 500 times solution or 25.9% plant protection spirit 500 times solution, 0.25 kilogram per root irrigation solution, 10 days after irrigation and continuous irrigation 2-3 times.