Diseases and pests of red spider lily and their control methods

Diseases and prevention methods of red spider lily

Bacterial soft rot

The pathogen is a weak parasite that mainly harms the tubers of the plant.

The pathogen invades through the wounds on the surface of the red spider lily, and secretes protopectinase during the expansion process. The pectin in the intercellular layer between the mealybug host cells causes the plant's cells to decompose and water to seep out. The diseased part will then appear soft and rotten, and sometimes emit a foul odor.

Prevention and treatment methods

Before planting, soak the plants in 0.3% copper sulfate solution for 30 minutes, wash with water, and plant after drying.

Spray 500 times diluted 50% carbendazim wettable powder every half a month for prevention and control.

In the early stage of the disease, spray with 2500 times diluted 50% benomyl.

Pests and control methods of red spider lily

Spodoptera litura

The disease is usually severe from late spring to November.

The larvae will harm the leaves, buds and fruits of the plant. They will eat the leaf flesh and bore into the flower stalks and seeds, causing the plant to grow weak, gradually wither and die.

Prevention and treatment methods

For prevention and control, you can use 2500 times diluted 5% Reponsil suspension or 1000 times diluted Wanling.

Lycoris radiata

The larvae will eat the inside of the bulb. When the damage is discovered, the leaves are often hollowed out, leaving a large amount of green or brown feces particles at the damaged area.

Prevention and treatment methods

Always observe the back of the leaves to see if there are neatly arranged insect eggs. Once found, remove them immediately.

You can dig out overwintering insect eggs when turning the soil in early spring to reduce the occurrence of insect pests.

When the disease occurs, spray 1500 times of the pesticide Lorsban or 800 times of chlorpyrifos emulsifiable concentrate. Choose to spray in the morning or evening when the larvae come out to move around, and the prevention and control effect will be better.

Grub

It is a general term for the larvae of the superfamily Scarabaeoidea of ​​the order Coleoptera.

The larvae live in the soil all their lives and like to bite newly sown seeds, rhizomes, seedlings, etc., causing missing seedlings and broken ridges. They are extremely widely distributed and cause serious damage.

Prevention and treatment methods

Once discovered, pesticides such as chlorpyrifos or dichlorvos should be used for spraying and prevention in a timely manner.