Q: The upper part of the cucumber plant surface has cracked stems and death. What happened? How to prevent?
Answer: According to the description, it should be cucumber bacterial blight. When cucumber plants are infected with the original bacteria, they can cause cracking of stems. Due to the recent frequent rain, the increase of humidity in the field is the main cause of the disease. When the humidity in the field is high, the diseased part often flows out of the amber-like glial substance, and after drying, the longitudinal cracks cause the stems and leaves above the diseased part to wither. After the onset of stems, the epidermis tends to tear, causing the melons to die. However, the vascular bundles do not change color and do not harm the roots. In severe cases, they cause the plants to die continuously and directly cause losses.
Control methods: Under high temperature conditions, watering is not timely and lack of nutrients can also cause cracking of the stem. Therefore, appropriate foliar fertilizer should be added during the control. Available 20% Yetazole 600 times liquid + cytokinin 1000 times liquid + Jing Bo calcium 800 times liquid + boron 1000 times liquid or 72% streptomycin 3000 times liquid + reported agricultural vigor 750 times liquid, 5 ~ 7 Sprayed once a day, can effectively prevent bacterial diseases and stem cracking.
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