Is buttonwood suitable for planting in front of or behind the house?
Cultivation techniques of Chinese parasol tree
Platanus acerifolia in China is usually propagated by sowing, cutting and rooting. Harvest the fruit when it is ripe in autumn, dry it and thresh it, then sow it in the autumn of that year, or store it in sand until the spring of the next year. The row spacing of drilling holes is 25 cm, the thickness of covering soil is about 1.5 cm ... and the sowing amount per mu is about 15 kg. Seeds germinate regularly, 4-5 weeks after sowing. Dry-stored seeds often germinate unevenly, so they can be soaked in warm water before sowing to accelerate germination. Under normal management, the height of the seedlings in that year can reach more than 50 cm, and then they will be planted and cultivated in the next year. Three-year-old seedlings can leave the nursery. The planting place should be chosen in a high and dry place, and the hole should be applied with Bika bacterial fertilizer as the base fertilizer. After drying, the incision should be sealed with wax. Pay attention to pests such as psyllid, chilblain moth and spiny moth, which can be controlled by petroleum emulsion, dichlorvos, dimethoate and methamidophos. In the north, young trees should be wrapped with straw ropes to keep out the cold in winter. Fertilize once in winter and once in early spring.
plant diseases and insect pests
The main pests and diseases of paulownia are paulownia psyllid, cotton leaf roller and so on.
Lycopodium Tokyo
Lycopodium vietnamese, also known as Lycopodium vietnamese, is the main pest of Lycopodium vietnamese. Nymphs and adults suck juice on the back of leaves or young branches of Platanus acerifolia, destroying dredging tissues, especially young trees, which are vulnerable. In severe cases, the leaves are all yellow and the top is withered. The white cotton wax secreted by nymph blocks the stomata on leaves, which affects the normal respiration and photosynthesis of leaves.
Make the leaves pale and shrivel. When the wind blows, the ash silk flutters with the wind, falling in flocs like flying fog, which makes people feel sticky when they accidentally touch it, and it smells bad and is difficult to clean. Seriously pollute the surrounding environment and affect the appearance of the city.
Prevention and control methods:
Chemical control: In the middle and late May, 10% aphid powder can be sprayed 2000~2500 times, 2.5% imidacloprid 1000 times or 1.8% avermectin 2500~3000 times.
Spraying clear water during the damage period can wash away flocs and kill many nymphs and adults. Spraying 8 times of 65% soap petroleum emulsion in early spring can prevent them from overwintering eggs.
Lepidoptera moth harms trees such as phoenix tree and magnolia tree. 40% chlorpyrifos EC can be injected 400 times into the damaged tunnel with a veterinary syringe to poison the larvae. It can also be controlled by petroleum emulsion, dichlorvos, dimethoate and methamidophos.
Pay attention to the protection and utilization of natural enemies such as parasitic bees, ladybugs and lacewings.
The leaves of cotton leaf roller larvae are cylindrical, and the leaves hidden in them are notched or perforated. Seriously eating all the cotton leaves will continue to harm the bracts or buds in cotton bolls and affect the growth and development of cotton plants.
Host not only harms cotton, but also amaranth, hollyhock, Abelmoschus manihot, hibiscus, kapok and so on.
Prevention and control methods:
Pinch the larvae and pupae in the leaves with your hands.
Spraying 40% dimethoate EC 1500 times, 5% imidacloprid EC 2000 ~ 3000 times or 25% diflubenzuron No.3 3000~4000 times every 7~ 10 days in the larval stage.