1、 Cause

1. The plant receives too strong sunlight, which may sunburn the plant leaves and cause rust spots on the plant leaves

2. If the plant is infected with diseases and insect pests due to improper maintenance, the plant will also grow rust spots on the leaves due to damage. The longer the time of disease, the larger the area of plant leaf infection

2、 Remedial measures

1. If it is because the sun is too strong, the rusty leaves can be removed in time, and then the plants can be shaded. However, you can't keep the plant in a dark place all the time. You can let the plant accept some scattered light, otherwise it will lead to plant malnutrition

2. If it is infected with diseases and insect pests, in order to prevent the disease from continuing to develop to other leaves, the diseased leaves should be quickly trimmed, the trimmed leaves should be burned, and then the leaves should be sterilized with insecticides or disinfectants, and then the plants should be placed in a ventilated place to restore vitality