A Detailed Guide to Common Pests and Diseases of Oriental Lilies and Their Control Methods

1. Diseases

(1) The first is called "gray mold." It is a disease caused by fungi. It occurs more often when the temperature is relatively high and the humidity is also relatively high. Its range of damage is fairly wide; leaves, flowers and stems can all be affected. To control it, first you need to clean up the parts that have already been affected. In addition, you can spray some chemicals, such as metalaxyl and so on. Also, the management afterward is very important. For example, when fertilizing, apply more fertilizer containing the two elements P and K to improve disease resistance. Also, strengthen ventilation, and do not water too much on cloudy and rainy days, and so on.

(2) The second disease is called "root rot." As the name suggests, it mainly damages the roots. First, the root area of the plant will rot. Then, because it cannot absorb water and nutrients, the entire plant may die. This disease occurs mostly from March to May. To deal with this disease, you can likewise use metalaxyl. In addition, disinfecting the soil is also a good method.

(3) The third is called "damping-off," which also mainly damages the roots. It may cause the plant to develop some brown spots. In the worst case, it will gradually dry up and die. If it is infected with this disease, first we must also disinfect the soil. Then there is spraying chemicals, such as chlorothalonil and so on.

2. Pests

There are many pests that harm this plant, such as "aphids," "white grubs," "cutworms" and so on. They often appear in groups, so relatively speaking the damage is also greater. To deal with them, the most effective method is spraying various chemicals. For example, omethoate and so on.