Black shank disease causes cucumber rot-head symptoms Identifying cucumber black shank disease mainly damages the growing point of cucumber, and the morbidity is rapid. Within a few days, the heart leaves wither. There are three points in the recognition: one is the formation of stellate perforation in the lesions of the leaves, and the symptoms are obvious. Other phenomena do not have perforation; the second is the cracking of the stem lesions, and there is often a flow of colloidal material; the third is the lesions on the melon strips. The transparent gel flowed out and became sores. Regardless of whether it is on the stem or on the melons, when the humidity is high, the disease minister has a layer of smoke and black mold.
Control methods (1) Cultivation measures: Scab is a disease of low temperature and high humidity. During the cultivation, attention should be paid to raising the temperature of the greenhouse and shortening the time of condensation on the surface of the leaves. Covering the plastic film and reducing the air and soil temperature; , Bring it to the outside and burn it out. (2) Chemical control: Use 25% DuPont Fuxing 8000x or 70% thiophanate-methyl 700x spray to control. In the early stage of onset, 50% carbendazim wet powder 1000 times solution and 70% mancozeb WP can be sprayed with 1000 times liquid. The spray growth point should not be sprayed.
The disease caused by cucumber blight
Symptoms The plants that observed the bad heads were found to have invaded the edges of the new leaves and presented with "V" shaped lesions. The stems were mostly killed in the joints, and there were amber or transparent gums. A large number of small black spots caused severe growth. The main difference between the diagnosis of this disease and Fusarium is that the vascular bundle does not change color, and it does not cause the entire plant to die.
Control methods (1) Rotation of crops: implementation of non-melon crops: rotation for more than 3-4 years. (2) Chemical control: 32.5% azoxystrobin dibenzoylzole 1500 times or 70% mancozeb 600 times plus 75% chlorothalonil smokeable shed, or stem lesions smear 9281 ( Fruit trees use 5 times liquid, the effect is better.
Bacterial edge blight causes cucumber to be bad
Symptoms of erythroblastic edge blight are susceptible to morbidity during the cold season. The disease caused by the disease symptoms of cucumber rotten head disease infection, the invasion from the new leaf edge, causing the edge of leaves dry, leaf veins folds, leaf curling.
Control methods can be used 72% of agromycin 3000 times or 77% can kill the wet powder 400 times spray control, every 5-7 days, once sprayed 3-4 times.
Symptoms Recognition of cucumber black shank disease mainly damages the growing point of cucumber, and the incidence is rapid. Within a few days, the heart can be withered. There are three points in the recognition: one is the formation of stellate perforation in the lesions of the leaves, and the symptoms are obvious. Other phenomena do not have perforation; the second is the cracking of the stem lesions, and there is often a flow of colloidal material; the third is the lesions on the melon strips. The transparent gel flowed out and became sores. Regardless of whether it is on the stem or on the melons, when the humidity is high, the disease minister has a layer of smoke and black mold. Control methods Cultivation measures: Scab is a disease of low temperature and high humidity. During the cultivation, attention should be paid to raising the temperature of the greenhouse, shortening the time of condensation on the surface of the leaves, covering the film, reducing the air and soil temperature, and promptly removing the debris from the shed. Burned outside the shed. Chemical control: more use of DuPont Fuxing times or thiophanate-methyl spray control. The early stage of the disease can be sprayed with carbendazim wet powder twice liquid plus mancozeb wettable powder twice times the liquid effect is better, do not spray the growth point when spraying. The disease caused by the blight of cucumber was observed in the observation of rotten heads. Many plants were found to invade from the edge of the new leaf, and they showed ""shaped lesions. The stems were killed in the joints with amber or transparent glial. In the course of logistics, there were a large number of small black spots, which caused severe growth. The main difference between the diagnosis of this disease and Fusarium is that the vascular bundle does not change color, and it does not cause the entire plant to die. Prevention and control methods for crop rotation: implementation of non-melon crops: more than a year of crop rotation. Chemical control: Azoxystrobin difenoconazole can be used, or mancozeb Mn-fold diluted with chlorothalonil, smoked canopies, or stem lesions (fruit trees) twice the liquid, the effect is good. Bacterial marginal blight causes symptoms of cucumber rot. Identification of erythroderial edge blight is easy to occur in the cold season. The disease caused by the disease symptoms of cucumber rotten head disease infection, the invasion from the new leaf edge, causing the edge of leaves dry, leaf veins folds, leaf curling. The control method can be controlled by using the agricultural leuplicin solution twice or by killing the wettable particulate powder and spraying it once a day with even spraying.
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