Lettuce brown spot mainly damages the leaves, and it usually leads to sickening and spreading of the seeds, spreading and infecting. When the plants grow poorly or apply nitrogenous fertilizers to cause over-stretching growth, it will cause the disease to worsen. There are two symptoms of the onset of symptoms: one is a watery appearance at the beginning, and then gradually expands to a round or irregular shape, brown to dark gray lesions, ranging in diameter from 2 to 10 mm. The other is a dark brown lesion with irregular edges and a watery halo around the periphery. Dark, dampish moulds were found on wet surfaces. In severe cases, the lesions merged and the leaves became brown and dry.
Prevention:
1. Clean the garden, timely soil preparation, deepen the sun, apply lime and apply organic base fertilizer. After harvesting, the diseased body was promptly brought out of the park and burned, and the disinfectant was sprayed to disinfect the whole garden. The new high-fat film was sprayed with 800 times liquid, which greatly improved the utilization of the effective components of the medicine.
2. Pay attention to reasonable irrigation during planting and management period, and use N, P, and K with reasonable top dressing, and apply foliar fertilizer to strengthen the stems to make plants grow robustly, increase resistance, make stem thick, leaves thick, fresh leaves, strong natural taste. .
3. Chemical control, at the beginning of the disease, 75% chlorothalonil wettable powder 1000 times solution and 70% thiophanate-methyl wettable powder 1000 times solution can be sprayed to reduce the spread of brown spot, and the formation of a new high-fat film Protective film to prevent the spread of pathogens by wind and rain, spraying once every 10 days, continuous control 2 to 3 times. Stop the medication 5 to 7 days before harvesting.
Prevention:
1. Clean the garden, timely soil preparation, deepen the sun, apply lime and apply organic base fertilizer. After harvesting, the diseased body was promptly brought out of the park and burned, and the disinfectant was sprayed to disinfect the whole garden. The new high-fat film was sprayed with 800 times liquid, which greatly improved the utilization of the effective components of the medicine.
2. Pay attention to reasonable irrigation during planting and management period, and use N, P, and K with reasonable top dressing, and apply foliar fertilizer to strengthen the stems to make plants grow robustly, increase resistance, make stem thick, leaves thick, fresh leaves, strong natural taste. .
3. Chemical control, at the beginning of the disease, 75% chlorothalonil wettable powder 1000 times solution and 70% thiophanate-methyl wettable powder 1000 times solution can be sprayed to reduce the spread of brown spot, and the formation of a new high-fat film Protective film to prevent the spread of pathogens by wind and rain, spraying once every 10 days, continuous control 2 to 3 times. Stop the medication 5 to 7 days before harvesting.
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MOQ: 100pcs
MOQ for OEM: 2000pcs
The main products are as follows;
1. Stethoscope ,
3. Digital Blood Pressure Monitor,
5. Nebulizer ,
6. Oral Irrigator ,
7. pharmacy products
Diagnostic Test Products,Digital Thermometer,Oral Irrigator,Blood Glucose Meter
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