Common diseases and pests of Koelreuteria paniculata and their control methods

Six-spotted black-spotted leopard moth

Symptoms of the six-spotted black-spotted leopard moth

The larvae will bore into the branches from the base of the petiole and the back of the main vein of the leaf. Sometimes the larvae can also bore directly into the branches. The infected branches will wither and die.

Six-spotted black-spotted leopard borer control

You can remove the branches and dead branches that are infested with insects, or you can spray them with insecticides such as jianchongsha and imidacloprid for prevention and control.

Pink-necked longhorn beetle

Symptoms of Pink Neck Beetle

The pink-necked longhorn beetle damages the xylem of the plant. The larvae bore into the xylem and excrete large amounts of reddish-brown feces.

Control of pink-necked longhorn beetle

It can be controlled with systemic insecticides.

Ceroplastes jujuba

Symptoms of wax scale

When the Koelreuteria paniculata plant is infected, the entire plant is covered with insects. The nymphs will suck the leaf sap, causing the tree to weaken.

Control of wax scale

Artificial control can be carried out by scraping off the female adults that overwinter on the trees and cutting off the infected branches.

In severe winter, if there is thick icicles on the branches, you can shake off the icicles and kill the overwintering female adults.

You can also spray omethoate, carbofuran or irrigate the roots with furadan to kill the nymphs.

Bischistodon

Symptoms of Double-toothed Grossworm

The larvae and adults of the two-toothed borer will damage the branches and trunks of the plants, eating the newly grown wood, causing the plants to dry up and die.

Double-toothed borer control

Manual control can be carried out by clearing dead branches and damaged trees, or adult insects can be captured manually.

You can use pesticides to control it, such as spraying cypermethrin, chrysanthemum spray emulsion and other pesticides.