What kind of plant is nettle

Plants are an indispensable substance in people's lives. Plants can regulate people's emotions, such as flowers, which are plants that many people like, especially female friends. Would like rose, jasmine etc. Then there are some plants that are relatively rare in our lives, such as nettles. As everyone knows, urticaria is a disease problem of skin allergy. However, many people do not know much about the plant called nettle. What kind of plant is nettle?

Species differences

Urtica dioica is the most widely distributed species in China. Its leaf margins vary greatly, generally with several shallow lobes, but some specimens in Hubei, Shaanxi and Sichuan are palmately 3-cleft or deeply fissured. Some young leaves have not yet differentiated into lobes and only have coarse teeth. This suggests that leaf division seems to be a more evolved trait; on the other hand, the fact that the trait is unstable also shows that this group of plants seems to be in the process of differentiation.

Growth environment

Nettle grows in semi-shaded and wet places on hillsides, roadsides or near houses at an altitude of about 100 meters (in Zhejiang) or 500-2000 meters.

Distribution

Distributed in Anhui (Qimen), Zhejiang, Fujian, Guangxi, Hunan, Hubei, Henan (Funiu Mountain), southern Shaanxi, southeastern Gansu, Sichuan, Guizhou and central Yunnan, China. It is also distributed in northern Vietnam.

Reproduction method

Seed propagation: The potted seedling emergence rate reached 91%, and the seedlings grew and developed well, with an emergence rate 11% higher than the field test. However, the field propagation seedlings emerged after 14 days, with an emergence rate of 80%. The seedlings grew and developed well and were stronger than those in the potted test. Fine land preparation can improve the germination rate of nettle seed propagation in the field. In Linzhi area of ​​Tibet, the breeding time of nettle seeds is mid-March every year, and the suitable sowing amount is 10 grams per square meter. Water the soil sufficiently, spread the seeds carefully, and sprinkle a thin layer of soil lightly after sowing. This can ensure that the seedlings are complete, neat and uniform. It can be transplanted after 6-8 leaves.

Pest and disease control

Diseases: Powdery mildew occurs in small amounts in high temperature seasons. You can use 1500 times diluted Bai Daifu and 1500 times diluted Libai alternately, spray once every 7-10 days, and it can be cured after 3 times. Insect pests, aphids and leaf miners are prone to occur, and can be controlled by using 1500 times diluted Chongbijing. Be careful not to expose your skin when spraying to avoid stings. If caterpillars are found on the leaves of the plant, the infested branches can be cut off and burned; or 500 times diluted 40% omethoate or 2000 times diluted 20% cypermethrin can be sprayed for prevention and control.