Tuberous begonias are beautiful plants with their large, showy flowers and lush foliage. However, they are prone to infestation by borers, which can damage the plant and even kill it. These pests can be difficult to control, but with a little effort, you can get rid of them and keep your tuberous begonia healthy and vibrant.
Borers are insects that lay their eggs on or in the stems of plants. When the eggs hatch, the larvae bore into the stem and eat their way through the plant tissue. This can cause significant damage to the plant and make it more susceptible to disease and other pests.
The first signs of borer infestation on a tuberous begonia plant are wilting leaves and stems. As the larvae continue to feed, the plant may develop cracks or holes in the stem. If left untreated, the plant may die.
There are several methods for controlling borers on a tuberous begonia plant:
The first step in controlling borers is to prune infected stems. Cut off any wilted or damaged stems at least one inch below the visible damage. Dispose of the infected stems in a sealed bag or burn them to prevent the spread of the borers.
Insecticides can be an effective way to control borers on a tuberous begonia plant. Look for an insecticide that is labeled for use on begonias and follow the instructions carefully. Apply the insecticide to the soil around the base of the plant and on any remaining healthy stems.
Beneficial nematodes are microscopic worms that feed on insect larvae, including borers. You can purchase nematodes from a garden center or online. Mix the nematodes with water and apply them to the soil around the base of the plant.
Sticky traps are another effective way to control borers on a tuberous begonia plant. Hang the traps near the plant and the borers will stick to them when they try to fly away.
Preventing borers from infesting your tuberous begonia plant is key to keeping it healthy. Here are some tips for preventing borer infestations:
The first signs of borer infestation on a tuberous begonia plant are wilting leaves and stems. As the larvae continue to feed, the plant may develop cracks or holes in the stem.
To prevent borers from infesting your tuberous begonia, plant it in well-draining soil and in a location that receives partial shade. Water the plants deeply but infrequently, apply a balanced fertilizer, and inspect your plants regularly for signs of borers and other pests.
Insecticides can be safe for your tuberous begonia if you follow the instructions carefully. Look for an insecticide that is labeled for use on begonias and apply it as directed.