I. Distinguishing between ticks and viral diseases Aphids generally parasitize on the back of the leaves of vegetables. When young leaves are damaged, the leaves become smaller and the color is darker. The texture becomes hard, thick and brittle, and the plants grow poorly; when the virus disease damages them. The young leaves of the affected young leaves are generally rolled up, showing deformity, pale leaves, and bright veins. After confirming that the vegetables are harmed by fleas, they can be sprayed with 73% Ketite EC 400-500 mg/L and 5% KSC 667-1000 mg/L; if it is confirmed to be a virus disease, it can be used to treat pests ( Such as maggots, whitefly, etc.) on the basis of disease prevention, choose 20% of virus A WP 1000 mg/L plus shellfish 3300 mg/L or 0.5% of phytoalexin 1000 mg/L plus Kantul plant Nutrients 1000-1667 mg/l solution spray control. 2. Differentiation of nematodes and blight and wilt disease Bacterial wilt, blight and nematodes can cause wilting of the damaged vegetable plants, but the former two are all infectious diseases. After the plants are victimized, the vascular bundle gradually turns brown. Slump at noon, return to normal sooner or later, and continue to languish late. The disease stem was cut and placed in a transparent glass filled with clear water. If there was bacterial wilt that overflowed with mucus, it was blight if no mucus overflowed and the leaves of the lower part of the plant turned yellow. In the early stage of nematode infestation, the aboveground plants grew poorly, the leaves were smaller than normal plants, and the roots of roots were reduced. Some nematodes could form "beads-like" nematodes on fibrous roots; some nematodes were at the junction of main roots and lateral roots. Cortical foraging caused damage to cortical tissue. Severe diseases such as cucumbers, watermelons, etc. may cause grafting with black-skinned squash, vegetable gourds, etc.; after the occurrence of bacterial wilt, we must reduce the humidity in the field and avoid flooding, and 77% can kill Wet WP or 25% WPWP 1667-2500 mg/L solution, each dose of 200 g; nematode can be controlled with 10% line of defense (green collection).
Blood System
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