What are the pests of magnolia?

The insect pests of magnolia include:

First, fried cicadas

The nymph of the fried cicada sucks the root juice of the flowers in the soil, the adults suck the juice of the main leaves, and the female inserts the ovipositor on the branches to lay eggs, causing the branches to die.

Prevention and control methods:

1. Kill the newly unearthed mature nymphs in time.

2. If it is serious, you can light a fire near the tree trunk on a hot summer night, shake the branches, burn the cicadas and kill the cicadas that fall outside the fire.

3. Apply the sticky mass of tung oil or cobwebs to the end of the bamboo pole to catch adults.

From April to August, inspect and cut off the spawning branches in time.

2. Red wax scale

The nymphs and adults of the red wax scale suck the flower juice, and their feces often induce the occurrence of coal fouling disease, so that a layer of black mold or thick black film is formed on the leaves, the whole plant becomes a black tree, and the plant is weak, rarely blooming or unable to bloom at all.

Prevention and control methods:

1. In winter and early spring, combined with pruning, some insect branches were removed.

2. If the injured flowers and plants are less or shorter, they can be scraped off manually in winter and spring.

3. During the peak incubation period of nymphs, spray 25% imidophos EC 1000 times or 40% omethoate EC 1500 times, once every 4-6 days, 3 times in a row.

4. when introducing flower seedlings, strict quarantine should be carried out to prevent insects from being brought in.

Third, blow cotton scale

Prevention and control methods:

1. Artificial prevention and control. Pinch off female worms and oocysts with hands or tweezers, or cut off multi-worm branches and leaves.

2. Biological control. Attract and release natural enemies such as big red ladybug and Australian ladybug to prey on cotton scale. Drug prevention and treatment. During the transfer period of newly hatched nymphs, 40% omethoate 1000 times, or 50% fenitrothion 1000 times, or ordinary washing powder 400 times 600 times, was sprayed every 2 weeks for 3 times.

4. Red spider

Prevention and control methods:

1. Soak the citrus peel with 10 times water for one day and night, filter and spray the plant.

2, detergent 15g, 20% caustic soda 15ml, water 7.5kg, mix well and spray the plant.

3. 50g plant ash, fully stirred with 2.5kg water, soaked in water and filtered for two days and nights, then mixed with 3G detergent and sprayed evenly, once a day, three times in a row, and three more times after a week, can eliminate the second generation pests and put them into the soil to control maggots.

4. Light a plate of mosquito-repellent incense, place it in a pot of diseased plants, and tie it tightly with a plastic bag. After 1 hour of smoking, it can kill eggs and adults.