How to do a good job in grassland maintenance and pest control of garden plants

Planting grasslands to protect and control pests;

(1) pruning

1. 1 pruning purpose. Lawn pruning is an important link in lawn management measures. Only by removing the excess part of the lawn surface within the allowable range can the unhealthy vegetative growth be controlled. The lower the lawn is mowed, the more beautiful the lawn looks and the more uniform the texture is. However, if the lawn grass grows too high, it will become messy, its quality will drop, and its use value and ornamental value will be lost.

1.2 Pruning principle and pruning height. Plants have the characteristics of regeneration, and the old leaves of the upper leaves that have been cut off can continue to grow; There are tender leaves, which may not be injured when pruning; Lawn grass can be divided into segments, and new branches and leaves can be produced on the segments, so it is more powerful and growing stronger to mow the lawn grass frequently. Generally, the suitable height of lawn grass is 2-4 cm, when the lawn grows to more than 5 cm.

Trim the lawn in time when planting rice, so that the lawn presents a certain height and a flat and clean appearance.

1.3, pruning frequency, pruning frequency and many factors, to go through.

Only by observing the growth and development of lawn for a long time can we judge the pruning frequency. For example, regional, seasonal and turf growth and development time may greatly affect the best growth and development time of different turfgrasses. Therefore, the pruning frequency is mostly in the adaptive growth time of the lawn, such as the rainy season, when the fertilizer is sufficient, the pruning frequency is relatively large. (2) Fertilization management

Proper fertilization provides nutrients for the growth and development of lawn and improves the texture and durability of lawn. The main lawn is made of nitrogen and phosphorus. Especially the application of nitrogen fertilizer has a great influence on the growth rate of lawn. Generally, the higher the amount of nitrogen fertilizer, the faster the lawn grows. In addition, pay attention to excessive use of nitrogen fertilizer will also weaken the resistance of lawn to pests and diseases. Therefore, the rational use of nitrogen fertilizer should not only ensure the demand for nitrogen in lawn, but also prevent excessive nitrogen application and ensure the healthy growth of lawn.

(3) Water

The water content of lawn tissue must reach more than 70%, so that the lawn can meet the water requirements. When the water content drops below 70%, it will produce withered buds and even die. Proper watering is the basic guarantee for the normal growth and metabolism of lawn grass, thus promoting the absorption and growth of nutrients by lawn grass. Morning and dusk are the best time to water the lawn, and the amount of irrigation depends on the growing environment. When the weather is hot or the water content in the soil can be checked to be low, the irrigation water can be increased. Only in this way can we ensure that the lawn grass has enough water supply.

(4), remove weeds

Weeds in the lawn and lawn grass are usually "close friends". In the process of growth, weeds compete with lawns for glory, moisture, nutrients and space, which greatly affects the photosynthesis of lawn grass, making lawn grass grow thin and even die without enough living space. In the maintenance and management of lawn grass, because lawn mowers can't distinguish lawn grass from weeds, it is necessary to manually pull out weeds, especially some weeds with creeping branches, which take root or lie down on the ground, and the workload is the largest. This requires long-term artificial weeding, so as to prevent potential weeds, control them before they harm lawn grass, establish the competitive advantage of lawn grass, and promote the healthy growth of lawn grass.

Third, the prevention and control of lawn grass diseases and insect pests

1, brown spot is also called Fusarium wilt.

This disease is characterized by the fact that leaves are first flooded, darkened and deepened in color, and finally dried, withered and light brown. The main cause of the disease is excessive application of nitrogen fertilizer and thick hay layer under high temperature. The cause of the disease must be balanced fertilization, increased application of phosphorus and potassium fertilizer, prevention of large amount of irrigation or flooding, removal of dry haystacks and native lawns, and reduction of sources of infection. 2. Pythium, also known as mildew, is characterized by its infection of turfgrass in high temperature and humidity, which will make its roots, rhizomes, stems and leaves brown and rot. Turfgrass has a round grayish brown hay spot with a diameter of 2 to 3 cm. The main reasons are low organic matter content, poor ventilation, lack of phosphorus and excessive application of nitrogen fertilizer in high temperature and humid environment. The prevention and control methods of pythium include: improving the planting terrain conditions, removing the accumulated water in rainwater and irrigation water in time, watering reasonably, reducing the irrigation amount, and controlling the relative humidity of the growing environment of lawn grass; Remove hay and diseased grass in time to avoid the spread of germs; Balanced fertilization, reasonable pruning, and don't cut grass too often in high temperature season.