What pesticide is best for controlling bayberry pests and diseases?

At the mention of bayberry, everyone is surely familiar with it; it is not only highly nutritious but also sweet in taste, and very popular among people. It is now grown in most regions, so what pesticide should be used for bayberry?

1. Brown spot disease

Damage symptoms: leaves infected with brown spot disease develop purple-red dots the size of needle tips on the surface. As the infection deepens, the leaf edges gradually turn brown or grayish brown. In the late stage of the disease, the center of the lesion becomes light reddish brown or grayish white, scattered with the fungus's ascospores, and the diseased leaves finally dry up and fall off.

Control method: Apply more organic fertilizer and potassium fertilizer to strengthen the tree's resistance, and drain accumulated water from the tree basin in time; every year in early spring, clear away dead branches and fallen leaves in the orchard to reduce pathogen-carrying branches; if the tree is already infected with the pathogen, spray carbendazim diluted 1000 times.

2. Cancerous swelling disease

Damage symptoms: branches infected with bayberry cancerous swelling disease produce small milky-white protrusions with smooth surfaces, usually occurring mostly at the nodes, causing the parts above the tumor to die; the bark becomes rough and cracked, uneven, causing premature aging of the tree, and in severe cases causing the death of the whole plant.

Control method: Take care to protect the tree body, minimize wounds on the tree as much as possible, and try to avoid causing mechanical damage to the tree to prevent pathogen invasion and infection; apply more organic fertilizer and potassium fertilizer to strengthen the tree's resistance.

3. Root rot

Damage symptoms: The pathogen usually invades through wounds; the hyphae invade the vascular bundles, causing them to brown and necrose, and in severe cases causing the decline and death of the whole tree. The leaves turn light green (green wilt), then gradually turn reddish brown and fall off, occasionally leaving a few branches and leaves, but they cannot sprout and grow the following year.

Control method: Deep plow and improve the soil, and apply more organic fertilizer and potassium fertilizer to improve disease resistance; promptly dig out and burn diseased plants to avoid further spread; be careful not to plant bayberry mixed with peach, pear, plum and other trees.

4. Pine caterpillar

Damage symptoms: Pine caterpillars can harm many kinds of forest trees. Newly hatched larvae like to gather on young shoots and tender leaves, but they have a strong ability to spread, easily causing scattered feeding damage, and in severe cases only the leaf veins remain.

Control method: Newly hatched larvae should be caught and killed in time, and sprayed with trichlorfon solution diluted 100 times; adults have strong phototaxis and can be trapped and killed with lights.

5. Bagworm

Damage symptoms: Bagworms mainly harm the new shoots and tender branches of bayberry, biting the leaves to pieces and causing the tender buds and branches to die.

Control method: Newly hatched larvae should be caught and killed in time, and sprayed with trichlorfon solution diluted 100 times.

6. Leaf roller moth

Damage symptoms: Leaf roller moth larvae like to spin silk and roll leaves on the new shoots and tender leaves of bayberry, causing the leaves to curl and wrapping the larvae inside the leaves; afterward the larvae feed on the leaf flesh inside the rolled leaves, spin cocoons, pupate and overwinter.

Control method: After discovering the larvae, spray fenitrothion diluted 1000 times or fenvalerate diluted 4000 times.