What are the control methods for pests and diseases of the tropical water lily (Nymphaea stellata)?

Main Diseases

Rot Disease

The pathogen of this disease most likely appears on wounds that have already formed, perhaps wounds caused by earlier insect damage or other diseases. However, there are generally disease-resistant varieties for this disease, so try to choose disease-resistant varieties, as this can greatly reduce the probability of the disease appearing. In daily care, you should also pay close attention to prevent the disease from occurring due to water that is too warm or too much water.

Leaf Rot

The symptom of this disease is naturally that the leaves gradually rot, and the plant cannot grow normally. When harvesting in the previous year, all diseased plants must be destroyed, which can reduce the possibility of plants getting the disease the following year. Once symptoms are found, spray with a fungicide immediately, such as a certain dose of carbendazim. About once every 10 days, 2-3 times in total is enough.

Main Pests

Small Leaf Beetle

This is definitely a "devastating" pest, usually occurring in summer. Once this period arrives, this insect will attack the leaves and the stems of the flowers, so the flower color may become very dull. Once this insect is found, immediately rinse the leaves with water, and also spray an appropriate amount of insecticide. When the infestation is severe, it is best to remove the entire infested leaf to prevent insect eggs from being left behind.

Snails

If you encounter this type of small pest, you can mix trichlorfon and wood shavings evenly, then put these powder and wood shavings into a cloth bag, and tie the bag directly to the leaf stalk to diffuse the liquid, so that the liquid can kill these small pests without harming the plant. If conditions permit, you can choose to put loaches directly on the water surface.