It is hot and rainy in summer, which is prone to disasters such as famine, waterlogging, diseases and pests, Landscape greening design in Harbin The company suggests that we should start with the prevention of famine and waterlogging and pests, and comprehensively carry out weeding, pest control, fertilization, waterlogging drainage and other work.

(1) In view of the serious occurrence of diseases and insect pests, it is necessary to predict and prevent the diseases and insect pests of seedlings in advance, formulate practical control measures for different insect pests, and cut off the pest branches according to the principle of simultaneous chemical control and physical treatment, effectively controlling the occurrence of diseases and insect pests.

① Lawn prevention and control: The weather is hot and rainy, and it is the season with frequent cold season lawn diseases. The maintenance and management work mainly focuses on disease control. The diseases that are easy to occur include rot mold, brown spot, powdery mildew, rust, damping off, etc., and chlorothalonil, carbendazim, mancozeb and other bactericidal drugs are mainly used. The insect pests that are prone to occur are small tigers and the use of polyester drugs such as phoxim.

② Prevention and control of green trees: The main pests of green trees are longicorn beetles, wood lice, leaf miners, leaf tigers, scale insects, scarabs, etc. In recent years, the damage of psyllid in trees and shrubs is more serious, followed by scale insects. The control effect can be achieved by using conventional pesticides, rapid killing, and metformin. The main diseases include root rot, powdery mildew, anthrax, etc. The commonly used drugs for prevention and control include tobuzin, carbendazim, anthrax, etc., with a common concentration of 800-1000 times. In addition to drug control, the dead branches and leaves shall be cleaned frequently in cultivation to keep clean, and waterlogging shall be eliminated. If necessary, pruning and spraying shall be carried out.

(2) In view of the large growth of weeds in summer, weeds should be removed in time to ensure the vigorous growth of seedlings and the overall effect of urban greening. Timely destroy and weed the hedges and lawns, and at the same time, shape and trim the hedges and lawns, and fertilize the seedlings in the green space by taking advantage of the favorable opportunity for seedlings to absorb water and fertilizer in the rainy season.

① Summer is the season when a large number of weeds occur. Timely removing weeds from the green space is an important measure to maintain the beauty and consistency of the garden landscape. Broad leaved weeds can be controlled with herbicides such as broadleaf weed, 2,4-D butyl ester, bentazon, etc. Grass weeds (such as Setaria viridis, Digitaria tangutica, Avena vulgaris, etc.) can be controlled with specific herbicides, but they are harmful and should be used with caution, most of which are manually removed.

② Large weeds under trees and shrubs must be eradicated, especially all kinds of vines, such as dodder, which are seriously harmful to trees.

③ Weeding should be carried out in sunny or early sunny days when the soil is not wet.

(3) Waterlogging prevention: generally, there is a large amount of water in rainy season, so the drainage facilities of each green space should be dredged in advance, and the affected seedlings should be remedied in time. After the rainstorm, the ponding around the trees should be removed, especially around newly planted trees.

(4) Fertilization in rainy season

① The rainy season is the most vigorous period for tree growth. Top dressing can be applied during the growth period according to the growth trend of the plant.

② The amount of fertilization shall be determined according to the conditions of tree species, tree age, growth period, fertilizer source and soil physical and chemical properties. Generally, if the DBH of arbors is below 375px, 1.0kg compost shall be applied per 75px; if the DBH of arbors is above 375px, 1.0-2.0kg compost shall be applied per 75px. If you want to expand the crown and view flowers and fruit plants during the young and middle-aged period, you should appropriately increase the amount of fertilizer.

③ For arbors and shrubs, fertilizer ring ditches should be dug first, and their outer diameter should be compatible with the crown width of trees, and their depth, width and height should be 25-750px.

④ The type of fertilizer applied shall be determined according to different requirements of tree species, growth period and ornamental. In order to expand the crown width in the early stage, nitrogen fertilizer should be applied, and phosphorus and potassium fertilizer should be applied to the tree species for flower and fruit viewing. Attention should be paid to the application of trace elements and fertilizer outside the root, and the application of compound fertilizers should be gradually promoted.

⑤ The perennial fertilizer accumulation of various green lands should be based on organic fertilizer. Organic fertilizer shall be applied after being decomposed. Fertilization should be carried out in sunny days; Fertilize except for roots, and the fertilizer shall not touch the leaves.