Aloe vera plants can sometimes suffer from black spot disease as they grow. When this happens, choosing the right pesticide becomes important. The severity of the disease can depend on factors like the aloe variety's resistance and the surrounding temperature. For instance, extreme weather conditions such as typhoons, heavy rains, fog, or hail, especially when the temperature fluctuates significantly between day and night, can exacerbate the problem and cause the disease to spread rapidly.
In the early stages of black spot disease, you'll notice watery, thread-like lesions appearing on the leaves. These lesions can grow into circular black or brown spots with a radiating pattern, often surrounded by yellow or yellow-brown smudges. As the disease progresses, darker brown particles might appear within these spots, and the leaf surface may become sunken while the internal tissue is destroyed, leading to multiple infections.
To combat this issue early on, consider using a 75% thiophanate-methyl WP solution diluted at 800 times, or a 50% carbendazim WP solution diluted at 600 times, along with 150 ppm of agricultural streptomycin. Spraying this mixture every 5 to 7 days, even up to two or three times, can yield significant results.
During the growing phase of your aloe plants, maintaining an optimal environment is key. Ensure the lowest temperature for aloe growth remains above 8 degrees Celsius to reduce the risk of infection. Additionally, practicing single-row planting can help improve air circulation and sunlight exposure. Applying 0.1% potassium dihydrogen phosphate as a foliar spray can also boost the plant's resistance to diseases. Proper field drainage is equally important—dig trenches around pathways to quickly remove excess water after rainfall, preventing waterlogging.
If the disease is more severe, pruning affected branches can help limit its spread. You can also apply a 50% carbendazim WP solution diluted at 600 times or a 70% thiophanate-methyl WP solution diluted at 800 times directly onto infected areas for thorough disinfection.
When purchasing pesticides, it’s essential to compare prices and find reliable suppliers. For example, check out this link [Pesticide Price] for detailed information on various products and their costs. Remember, selecting the right pesticide based on your specific situation is crucial for effectively managing black spot disease in aloe vera plants.
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