Street Greening-Picture of Sophora japonica
1, locust
The aphid of Sophora japonica clustered on the shoots, inflorescences and pods as adults and nymphs, and sucked the juice, so that the damaged shoots shrank and drooped, which hindered the growth of the top, and the seriously damaged inflorescences could not bloom and die, and at the same time induced sooty blotch. Every year, the insect began to multiply in large numbers in early and mid-March, produced winged aphids in April, and moved to Sophora japonica in early May, causing the most serious damage in May and June. In early June, it moved to miscellaneous grass to live, and in August, after moving back to Sophora japonica for a period of time, it overwintered with wingless viviparous female aphids in the rhizosphere of weeds and a small number of eggs.
Control methods of locust:
(1) Spray the mixture of stone and sulfur in autumn and winter to eliminate the overwintering eggs.
(2) When aphids occur in large quantities, spray 40% omethoate, 50% malathion emulsion or 40% acephate 1000 to 1500 times or spray rotenone 1000 to 2000 times, and 10% Aphidine.
(3) At the early stage of aphid occurrence or before the overwintering eggs are hatched in large numbers, dip and suck 40% omethoate emulsion for 8 to 10 times, circle the trunk, and wrap and bind it with plastic sheets.
2. Tetranychus cinnabarinus
Tetranychus cinnabarinus overwinters as a fertilized female mite in soil porosity, bark cracks, litter and other places, and all the mites are harmful on the back of leaves. The injured leaves initially show yellow and white spots, and then spread to the whole leaves, with dense filament nets. In severe cases, the leaves of the whole tree are yellow and fall off.
Control methods of tetranychus cinnabarinus:
(1) Prevention and control during the wintering period: use the mixture of sulfur and stone to scrape off rough skin and warped skin, or use the trunk sokcho to trap overwintering mites, which will be burned intensively in the spring.
(2) Chemical control: When spider mites are found to be harmful to leaves, they should be sprayed as early as possible to control the early damage, which is the key to control the later pests. It can be controlled by spraying 40% dicofol EC 1000 to 1500 times, 50% tetradifon wettable powder 1500 to 2000 times, 40% omethoate EC i500 times and 20% mirex EC 3000 times, and the spraying should be uniform. If it is serious, spray it every half month 1 time, and spray it continuously for 2 to 3 times, which has a good effect.
Guohuaishu
3, locust inchworm
Also known as locust moth. It is a serious pest. 1 year produces 3 to 4 generations, the first generation of larvae begins in early May, and the peak periods of each generation of larvae are late May, mid-July and late August to early September respectively. The pupa overwinters in the loose soil around the trees, and the larvae and adults eat the leaves of the trees, causing the leaves to be engraved. In severe cases, almost all the leaves of the whole tree are eaten up.
Control methods of Sophora japonica:
(1) After defoliation and before germination, the pupae are dug in the loose soil under and around the crown to eliminate the overwintering pupae.
(2) Chemical control: In mid-May and late June, we should focus on the control of the first and second generation larvae. 50% acetaminophen EC, 80% dichlorvos EC 1000 to 1500 times, 50% phoxim EC 2000 to 4000 times and 20% mirex EC 2000 times can be used.
(3) The biological control can be 600 times that of Bacillus thuringiensis emulsion.
Pictures of Sophora japonica
4. Rusty-colored Cerambycidae
Rusty-colored Apriona germari occurs every two years 1 generation, and it is mainly damaged by larvae. In early March of each year, larvae start to move, and the dung and sawdust of Apriona germari larvae are hung at the wormhole. The Sophora japonica tree bored by Apriona germari is weak, its leaves are yellow, its branches are dry, and even the whole plant dies.
Control methods of Apriona rustica;
(1) Artificial killing of adults: The adults of longicorn beetles are weak in flying ability and easy to fall to the ground due to vibration. The seedlings can kill female ovipositors on the trunk at night from mid-June to late July every year.
(2) Artificial egg killing: During the spawning period of longicorn beetles from July to August every year, find the egg pieces on the trunk and break them with iron.
(3) Chemical control of adults: During the peak period of adult activity from mid-June to mid-July every year, spraying 2000 times of liquid on the crown of Sophora japonica to kill pyrethroid, once every 15 days, and spraying twice continuously, which can achieve good results.
(4) Chemical control of larvae: March to 10 every year is the active period of longicorn larvae, and 80% dichlorvos, 40% omethoate or 50% phoxim can be injected into the wormhole, and then miaomu.w.cn will seal it with poisonous mud mixed with chemicals, which can poison the larvae.
(5) Using lime 10 kg+sulfur 1 kg+salt 10 g+20-40 kg of water to make a whitening agent, and brushing the trunk to prevent longicorn beetles from laying eggs.
Sophora japonica seedlings
5, Sophora japonica leaf moth
The second generation of Sophora japonica leaves moth 1 year occurs, and the larvae overwinter in the cracks of bark or seeds, and the damage is the most serious in July and August. The larvae mostly eat from the base of compound leaf petiole, causing the compound leaves of trees to dry up and fall off. In severe cases, the crown appears bald and dead, which affects the appearance.
Control methods of Sophora japonica leaf moth;
(1) In winter, the trunk is tied with straw handles or straw ropes to trap and kill overwintering larvae.
(2) Spraying 40% acephate EC 1000 to 1500 times, 50% fenitrothion 1000 times or 50% malathion EC 1000 to 1500 times during the pest occurrence period.
The above are the common diseases and pests of Sophora japonica and their control methods. As long as the temperature, fertilization, management and maintenance are suitable, I believe the diseases and pests will stay away. At present, the planting of green seedlings is hot, and several common seedlings are greatly welcomed by urban greening and government procurement departments. Sophora japonica is one of them. Recently, the price of Sophora japonica has risen steadily. The following is the price list of Sophora japonica compiled by the Seedling Information Center for your reference and exchange.