Common diseases and pests of bayberry and their control methods

Bayberry diseases

Brown spot symptoms

Needle-sized purple-red spots will appear on the surface of leaves infected with brown spot disease. As the infection worsens, the edges of the leaves gradually turn brown or gray-brown. In the later stages of the disease, the center of the spots turns light reddish brown or grayish white, with ascospores of the pathogen scattered on them. The diseased leaves eventually dry up and fall off.

Brown spot disease prevention and control methods

Apply more organic fertilizer and potassium fertilizer to enhance the resistance of trees, and remove water from the tree base in time; remove dead branches and leaves in the garden in early spring every year to reduce pathogenic branches; if the trees have been infected with bacteria, spray 1000 times diluted carbendazim.

Cancer symptoms

Branches infected with bayberry cancer will develop small milky white protrusions with a smooth surface. They usually occur at the nodes and will cause the area above the tumor to die; the bark will become rough, cracked, and uneven, causing premature aging of the tree, and in severe cases, the entire plant will die.

Cancer prevention and treatment methods

Pay attention to protecting the trees, minimize the wounds on the trees, try to avoid causing mechanical damage to the trees, and prevent the invasion and infection of pathogens; increase the application of organic fertilizers and potassium fertilizers to enhance the resistance of the trees.

Root Rot Symptoms

The pathogen usually invades through wounds, and the hyphae invade the vascular bundles, causing them to turn brown and necrotize. In severe cases, the entire tree will die. The leaves are light green (withered), gradually turn reddish brown and fall off, occasionally leaving a few branches and leaves, but they cannot sprout and grow the following year.

Root rot prevention and treatment methods

Deep plowing and improving the soil, and increasing the application of organic fertilizers and potassium fertilizers can improve disease resistance; promptly remove and burn diseased plants to avoid further spread; be careful not to plant bayberry together with peach, pear, plum and other trees.

Bayberry pests

Symptoms of pine caterpillar damage

Pine caterpillars can harm many types of trees. Newly hatched larvae like to gather on new shoots and tender leaves, but they have a strong ability to spread and can easily cause dispersed feeding damage. In severe cases, only the veins of the leaves remain.

Pine caterpillar control methods

Newly hatched larvae should be killed in time by spraying them with a 100-fold diluted solution of dichlorvos; adult insects have a strong phototaxis and can be killed with light.

Symptoms of debt avoidance bug infestation

The debt-avoiding insect mainly harms the new shoots and branches of bayberry, biting the leaves and causing the death of young buds and branches.

Debt avoidance bug control methods

Newly hatched larvae should be killed in time by spraying with a 100-fold diluted dichlorodiphenyltrichloroethane solution.

Symptoms of leaf roller damage

The larvae of leaf rollers like to spin silk to wrap the tender leaves of the new shoots of bayberry, causing the leaves to curl and wrap the larvae in the leaves. The larvae then eat the leaf flesh in the curled leaves, spin cocoons and pupate to overwinter.

Leaf roller control methods

After the larvae are found, you can spray 1000 times diluted cypermethrin or 4000 times diluted cypermethrin.

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