Rust is one of the most common diseases of aloe, which usually occurs in summer when the temperature is high and the humidity is high. The pathogen propagates through spores and overwinters on the surface of the soil with the residual of the pathogen. The spores pile up under the epidermis, and break up into dark brown.
It needs careful maintenance and observation. In case of any disease, remove the residual leaves of aloe and burn them.
In the early stage of aloe brown spot, there will be many dark green water spots on the leaves, and with the aggravation of the disease, the spots gradually expand into a circle. At the later stage of the disease, many black particles will appear in the lesion. The more the disease, the more the particles, the more serious it will lead to the rot of Aloe Vera.
1. Plant resistant varieties.
2. Strengthen the management and care of potted plants, pay attention to the suitability of room temperature, keep ventilation and fertilizer balance.
3. Pay more attention to the observation of potted plants. Remove and destroy the diseased leaves as soon as they are found.
4. In case of disease, it can spray 100% chlorothalonil 75% powder 1000 times. Spray once every 2-3 weeks, 3-4 times in a year.
Leaf blight usually occurs in southern China and spreads through water or insects. Its symptoms include small dark brown spots at the tip of the leaves, which gradually expand, dry up, shrink the spots and produce small arranged black spots at the later stage.
1. Pay attention to observation and prevent the spread of disease.
2. Select varieties with strong disease resistance, such as Chinese aloe, Curacao, etc.
3. Aloe is not cold resistant, so we should pay attention to the combination of water and fat to enhance its disease resistance.
4. Potted medicament for control (75% chlorothalonil wettable powder 600 times medicament liquid).
