Control Methods and Technical Key Points for Cucumber Green Mottle Mosaic Disease
Many farmer friends will find green spots frequently appearing on cucumber leaves and flowers during the growing process, which greatly affects the growth and development of cucumbers. In fact, this is called green mottle mosaic disease, and the main sources of this disease are seeds and soil. Its causes are varied, so it is also relatively difficult to control. Now the editor below will explain the main symptoms of mottle mosaic disease and the solutions.
1. Disease Symptoms
This green mottle mosaic disease does not mean that the spots are only green; its spots come in two colors, one green and one yellow. When the disease first occurs, it infects seedlings at the seedling stage, and green spots appear on the top few leaves of the seedlings. On relatively smooth and flat leaf surfaces, bright green raised areas will form; new leaves are darker in color, and in the end the entire leaf veins become transparent, and new leaves cannot grow larger, becoming smaller and smaller. This leads to reduced photosynthesis in cucumbers and insufficient plant nutrition, resulting in stunted plants and wrinkled leaf surfaces. Green patches also appear on the fruit, and in more severe cases, tumor-like growths form on the cucumber, causing the fruit to eventually grow into deformed fruit, making the fruit lose its commercial value and seriously affecting farmers' economic interests. The symptoms of yellow patches are similar to those of green patches, only the color is different.
2. Transmission Routes
The main transmission routes of leaf and flower green mottle disease are through soil and seeds, and the conditions for transmission are relatively broad. Pathogens on seeds can spread to leaves, causing symptoms on young leaves after about three weeks. In addition, the pathogens of this disease are extremely easily spread through hands, clothing and other artificial media. During farm operations in the garden, even a little carelessness can lead to large-scale spread of the pathogen and infection of other plants.
3. Conditions for Disease Onset
Cucumber is a crop that likes water and light. The period when this disease occurs is mostly in summer. A high-temperature environment will accelerate the development of the pathogen and increase its infectivity. Storms and heavy rain can cause plants to collide with each other, and branches to rub against each other and create wounds, or when plowing and fertilizing, carelessness may damage the roots and burn them. Then the pathogen will take advantage of the wounds to invade and infect.
4. Control Methods
When selecting seeds, choose disease-free and disease-resistant improved varieties, such as Chunqiu Lu, Zhongnong No. 8 and other products. Establish disease-free seed fields in the garden, frequently apply a small amount of disease-free organic fertilizer, strengthen the resistance of seedlings, and accelerate growth. During farm operations in the garden, avoid injuring the roots. If diseased plants are found, they should be pulled out in time. Pay attention to disinfection when sowing to avoid already carrying disease from the very beginning. Seeds can be disinfected with high-temperature water or chemicals such as trisodium phosphate. Water appropriately to prevent the soil from becoming too dry.
The above is a brief introduction to cucumber green mottle mosaic disease. The conditions for the onset of green mottle mosaic disease are very easy, and there are also many transmission routes. Therefore, in daily management and intertillage and hilling, try to avoid injuring the roots. Reducing the occurrence of wounds also reduces the incidence of the disease. To learn more related information, please continue to follow Qinnong.com.