Common diseases and pests of Selaginella and their control methods

Selaginella diseases

Leaf spot

Leaf spot disease often occurs during the rainy season, and is generally more likely to occur in humid weather because humid weather makes it easier for the bacteria to multiply. When the disease first occurs, it appears as small brown spots. The edges of the leaf spots become water-soaked and faded, and expand outward in a ring-like pattern. In the later stage, dark brown mold spots will appear in the center of the lesions, and under humid conditions, they will turn into a dark brown mold layer.

Leaf spot disease prevention and control methods

Remove diseased leaves promptly and spray with 100 times diluted carbendazim during the disease period.

anthrax

Anthracnose initially occurs on the leaves and in severe cases spreads to the petioles. In the early stage, the lesions appear as small water-soaked yellow spots, which gradually spread into a ring-like shape. In the later stage, the lesions become connected into one, causing the leaves to dry up, and small black spots arranged in a ring pattern will appear.

Anthracnose control methods

Strengthen maintenance and increase the application of phosphorus and potassium fertilizers to enhance plant resistance; in the early stage of the disease, you can spray with 1000 times diluted equal-volume Bordeaux mixture or 1500 times diluted thiophanate-methyl solution.

Selaginella pests

Brown Soft Scale

Brown soft scale can harm many kinds of plants and is more common on Selaginella. Brown soft scale generally gathers on leaf surfaces or young leaves, sucking plant sap through piercing-sucking mouthparts, which can easily induce sooty mold disease, affect the plant's photosynthesis, and ultimately cause weak growth and yellowing leaves.

Brown Soft Scale Control Methods

When there are not many insects, you can use a brush or bamboo stick to scrape off the insect bodies; during the nymph hatching period, you can spray with 100-fold diluted malathion emulsifiable concentrate or oxydemeton-methyl emulsifiable concentrate.

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