Organic salt Shandong YingLang Chemical Co.,Ltd , https://www.sdylhgtrade.com
How to prevent lotus leaf rot after heavy rain
In recent days, we've experienced several consecutive heavy rainfalls in the area. Many of these rains have flooded the lotus ponds, leading to a noticeable issue. Within a week after the rains, the lotus leaves started showing signs of yellowing and rotting. The infection began with the younger leaves and gradually spread to the larger ones. Additionally, other plants in the pond, such as reeds and poplars, also showed similar symptoms on their leaf edges. What could be causing this? And how can it be treated?
Based on the description provided, it seems that the lotus is likely suffering from either leaf spot or leaf blight. These conditions are typically caused by fungal, bacterial, or mold infections. In northern China, prolonged heavy rains between June and September often create ideal conditions for the spread of various fungi. If the lotus plants are not receiving enough nutrients or are growing weakly, they become more vulnerable to bacterial diseases.
To manage the problem, the approach depends on the size of the nursery and the severity of the infection. For smaller areas with mild cases, manually removing the infected leaves—both floating and upright ones—can help reduce the spread. At the same time, improving fertilizer and water management will support plant health and help control the disease.
For larger nurseries with more severe infections, it's necessary to take stronger measures. Local agricultural departments may recommend purchasing bactericides and removing affected leaves. Effective treatments include a 25% wettable carbendazim or zineb solution, a 50% thiophanate-methyl diluted at 800 times, or a 0.1% detergent powder mixture. When dealing with large areas, a 50% carbendazim or thiophanate-methyl solution mixed with 10 parts of lime powder can be used. Spraying should be done early in the morning or late in the evening, avoiding midday when the sun is strongest. It's recommended to spray once every 15 to 20 days, repeating the process two or three times for best results.
In addition to chemical treatments, proper care of the plants through balanced fertilization and controlled watering is essential. This helps strengthen the lotus plants and makes them more resistant to future infections. Regular monitoring of the pond and its surrounding environment is also important to catch any new issues before they become serious.
Next Article
How did Asarum choose to do it?