Characteristics, propagation and cultivation techniques of disease and insect pest control of silk wood

Characteristics, propagation and cultivation techniques of disease and insect pest control of silk wood

Summary of the characteristics of 1 silk cotton wood

Silk cotton wood belongs to Celastraceae, also known as Baidu, the tree is usually 6 ~ 8 m high, the leaf shape is round, oval or nearly round, the leaf color is light green, and the flowers are small; silk cotton wood is delicate and malleable, and is often used to carve daily utensils; its seeds are rich in oil and are excellent raw materials for industrial oil production. Silk cotton is positive, which is most suitable to grow in places with more sun, less cold and less shade, and its root system has a strong ability to adapt to neutral and acidic environment. Silk cotton wood has a strong demand for fertilizer and water, so it is suitable to grow at the edge of the water or in a fertile and watery place, because it has a certain ability to resist acid soil and absorb acid gas in the air. it also has a certain purification effect on air pollutants such as dust.

Cultivation techniques of 2 silk cotton wood

2.1 selection of nursery land and fertilization for soil preparation. The nursery land of silk cotton should be selected according to its biological characteristics such as acid resistance and water and fertilizer demand, so as to keep the humidity of the nursery and the content of beneficial substances in the soil at a suitable level, and keep the soil in a slightly acidic environment. The land that has been growing silk cotton for many years should be excluded. The treatment of nursery land should be carried out before planting. In general, the soil should be treated deeply in winter to use the weathering effect of the environment to eliminate some harmful microorganisms in the soil. This step needs to be repeated in the first half of sowing. And remove visible foreign bodies in the soil, such as pebbles, plastic bags and other substances that are not conducive to the growth of seedlings. At the same time, it is necessary to fertilize the soil in advance to increase the content of organic matter in the soil, and the nursery is divided into high beds with a width of 1.2 m, a height of 0.2 m and a furrow spacing of 0.3 ~ 0.35 m.

2.2 sowing and seedling management. Before storing the silk cotton seeds, the seeds should be dried in the shade to peel off as much as possible, at the same time, before sowing, the seeds should be soaked to remove the aril, and then the treated seeds should be mixed with wet sand after the soil conditions are suitable. It can increase the water content in the environment and catalyze seed germination. The nursery was irrigated before sowing, and the high border was used for ditch sowing. After emergence, the growth of each border was observed, the seedlings were replenished where the seedlings were sparse, the seedlings that were not growing well were removed, the distance between seedlings was adjusted, and the competition between species and species was reduced. Increase or decrease the amount of irrigation timely according to the weather conditions, and topdressing according to the growth of seedlings to remove weeds in time. The growth of side branches of silk cotton wood will inhibit the growth of the trunk, prune the side branches in time, and cultivate a sturdy and straight trunk.

2.3 Disease and pest control. Most of the insect pests are Euonymus inchworm, which likes to eat silk cotton leaves, which hinders the growth of silk cotton wood. The phototaxis of the inchworm can be used and the black light can be used to trap and kill. At the same time, the soil preparation in the nursery can be combined to kill the pupae. The larval stage of Euonymus inchworm can be controlled with 600x Bt emulsion and 2000 times of 20% chrysanthemum EC.