Pepper leaf curling can occur due to pests, environmental stress and viruses. While pepper plants add variety to a garden, they are sensitive to pest damage and improper growing conditions.Continue Reading
The feeding of pests, such as mites, aphids, whiteflies and thrips, contributes to leaf curl on pepper plants. While mature leaves can develop spotted or stippled areas if pests feed on them, developing leaves may grow curled or twisted depending on where the pests feed. Viral diseases also cause pepper leaves to curl, and they are often caused by infection from different insects and pests.
Environmental conditions can cause stress on pepper plants. Leaves curl regularly during the middle of hot summer days. Strong winds or high humidity can cause pepper leaves to curl in self defense.Learn more about Botany