Common pests and control of magnolia flowers

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Fried oyster

The fried nymphs suck the root juice of the flowers in the soil, the adult sucks the juice of the main leaf, and the females lay the ovipositor on the shoots to spawn, causing the shoots to die.

Control methods: 1 Kill freshly cooked nymphs in time. 2 If it occurs more severely, it can be ignited near the tree trunk during the hot summer nights. Shake the tree branches to make the crickets burn to death and kill the crickets that fall outside the fire. 3 Use sticky tung oil or cobweb kneading sticks to stick to bamboo sticks to trap adult insects. From August to August, the inspections were performed in time and the spawning sticks were cut off.

2. Red wax

The nymphs and adults of Red Waxbill suck the flower sap, and their excrement often induces the occurrence of coal fouling, forming a layer of black mold or a thick black film on the leaves. The whole plant becomes a black tree, the plants are weak and rarely flower. Or can not flower at all.

Control methods: 1 winter and early spring, combined with pruning to remove some of the worm branches. 2 If the plants of the damaged flowers are less or shorter, they can be manually scraped in the winter and spring. 3 In the incubating period of nymphs, spray 25% imidothiophosphate 1000 times, or 40% omethoate EC 1500 times, spray once every 4 to 6 days, and spray 3 times. 4 When introducing flower seedlings, strict quarantine shall be taken to prevent the introduction of insects.

3. Blowing

Control methods: 1 manual control. Use hand or tweezers to pinch off female worms and oocysts, or cut away many insects. 2 biological control. The introduction of red ladybugs, Australian ladybugs and other natural enemies preyed on the blows. Drug control. During the transfer period of newly hatched nymphs, spray 40% omethoate 1000 times, or 50% cesarean orange 1000 times, or ordinary detergent 400 to 600 times, spray once every 2 weeks, even spray 3 ~ 4 times.

4. Red spider

Control methods: 1 Soak citrus seeds with water 10 times a day and night, and spray the plants after filtration. 2 Wash powder 15g, 20% caustic soda 15ml, water 7.5kg, spray the plants after mixing. 350g grass ash, plus 2.5kg water, stir well, soak two days and nights filter, add 3g washing powder and mix thoroughly, spray once a day, even spray 3 times, spray 3 times every other week, you can eliminate the second generation of pests, Put into the soil can control aphids. 4 Igniting a mosquito-repellent incense plate, placing it in a disease-plant pot, and then using a plastic bag to consolidate the pot, and after 1 hour of smoking, kill the eggs and adults.

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