Diseases and prevention methods of tuberose

Diseases of tuberose: powdery mildew

symptom

Powdery mildew mainly harms the leaves of tuberose.

In the early stage, small yellow spots appear on the leaves, which are scattered individually, and then gradually develop and expand into round or oval spots. They are united together and can even cover the entire leaf. A white powdery mold layer grows on the surface.

Generally speaking, the lower leaves are more seriously affected than the upper leaves, and the back of the leaves are more affected than the front.

Powdery mildew can affect the photosynthesis of tuberose, disrupt its metabolism and cause premature aging.

Prevention and treatment methods

When purchasing tuberose seedlings, you should choose disease-resistant varieties, remove diseased plants, and eliminate the source of the disease.

The simplest prevention method is to ensure sufficient light and timely ventilation.

If the disease has already occurred, it is necessary to use 1000 times of 70% methyl thiophanate solution or 2000 times diluted 50% mancozeb solution in the early stage. You can also use 2000 times of 25% triadimefon wettable powder for spraying to control the disease.

When the symptoms are serious, you can spray 1000 times diluted 50% Yifaling wettable solvent, 0.2-0.3°Be lime sulfur mixture, or 500 times diluted 40% sterilization pill.

Remove diseased leaves promptly and destroy them, and separate diseased plants from healthy plants to avoid cross-infection and aggravate the spread of the disease.

Diseases of tuberose: Anthracnose

symptom

It can occur at any time of the year, but is more common in hot and rainy seasons.

The spots spread from the leaf tips to the rhizomes. They are brown at first, then gradually expand and increase in number, and many dry black spots appear. In severe cases, the plant dies.

Prevention and treatment methods

When the disease occurs, 1000 times diluted 75% methyl thiophanate wettable powder can be used once every 7-10 days.

You can also use 600 times diluted 80% anthracnose WP, 700 times diluted 75% thiophanate-methyl WP for spraying.

Normally, you can use 1:1:200 Bordeaux liquid for prevention and control, once every half a month, and spray 3-5 times continuously.