Diseases and Pests of Begonia and Their Control

1. Aphids.

Spring and autumn are the peak growing seasons for Begonia. If the plants are not well ventilated and the environment is hot and stuffy, aphids are likely to occur. This is a small green-yellow or brown insect that often lives on the tender shoots or flower buds at the top of the plant. It uses its needle-like mouthparts to suck the sap from the leaves of the begonia, causing the leaves to curl and shrink, leading to death. The main method of prevention and control is to increase indoor ventilation. If insect pests are found, you can soak cigarette butts in water for 24 hours and then spray them on the stems and leaves of the Begonia. This will have a better effect. Use 1500 times diluted 50% aphidicide emulsion or 1000 times diluted 25% phosmet emulsion to spray and kill aphids.

2. Red spider.

3. Leaf rollers.

This insect is very small in size, and its larvae mainly eat tender leaves, causing the leaves to curl up, the plant's growth to decline, and the flowers to bloom poorly. To control this disease and pest, just check more often and cut off the diseased leaves in time.

4. Stem rot.

Water-shaped markings that appear on the rhizomes and lower parts of the stems can lead to softening and rot if not attended to. This is mainly caused by the potting soil being too wet, so it can be prevented by controlling the amount of watering.
It is rare for begonias grown at home to be subject to diseases and insect pests. However, the potted plants must be placed appropriately in a ventilated and cool growing environment, and must be protected from infection by pests and diseases from other potted flowers and trees.