During soft rot disease, soft rot appears near the surface of the plant, and causes the leaves to become soft, wet, and withered. The flower color turns brown, and the peduncle softly rots, causing the tuber to stick to soft rot and root rot. , even the plants wilted and died. Control measures: Remove the sick bulbs when harvesting, and soak in formalin 55 times for 1 hour, then dry and store; the depth at the time of planting shall not exceed 5 cm, and avoid watering excessively; Burn out and disinfect the soil with formalin 40 times around the diseased plants.
In the early stages of leaf spot disease, there were small round spots and pale spots on the leaves. Afterwards, they gradually expanded into irregular large patches, sometimes invading flowers and pedicels. Control measures: The diseased leaves were found to be cleared in time, and 25% of the enemy's strength was used to remove 1000-1500 times of the emulsion or 80% of the 500 times of the big students. The spray was applied once every other week and sprayed 2-3 times; the usual maintenance was to avoid pouring too much water. Water.
Mosaic disease mainly shows two symptoms: First, the leaves are typical mosaic leaves and reduce the distortion of the disfigurement, green ring spots or stripes appear near the leaf veins, and the leaves are distorted; second, the white spots appear on the peduncles, and the buds appear light-colored Spots, flowers malformed. The disease can be transmitted by ticks and thrips. Prevention and control measures: disease-free tubers were selected during planting, diseased plants were found during the growth period and burned out in time. In the whole growth period, 50% marathon 1000 times or 2.5% deltamethrin EC was used to control aphids and thrips.
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