Codonopsis pilosula pest: red spider
It belongs to Araneae, Acarina, Tetranychidae. The adults and nymphs gather on the back of the leaves to suck the juice and draw silk to form a net, which harms the leaves and shoots, turns the leaves yellow and finally falls off; the flowers and fruits cause atrophy, dryness, rapid spread and serious harm, especially in the autumn drought.
Control methods: clear the garden in winter, pick up the dead branches and leaves, and burn them centrally. spray 1 °2 °B é (1 °2 Baume) stone sulfur mixture after clearing the garden; spray 0.2 °0.3 °B é (0.2 °0.3 Baume) stone sulfur mixture in spring, or 50% fenitrothion 1000-2000 times. Once a week, several times in a row.
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Codonopsis pilosula pest: grub
It belongs to Coleoptera, Scarabidae. It is the larva of the beetle, which is mainly active in the soil and harms the root of Codonopsis pilosula. Grubs usually occur one generation a year, and larvae or adults survive the winter in the soil. When the temperature rises in the following spring, the grub gradually moves to the top of the soil. When the soil temperature is above 15 ℃, the grub feeds on the topsoil above 10cm. When the temperature rises and the soil is dry in summer, it goes down to the deep layer of the soil. In autumn, it returned to the topsoil layer, and after October, it dived into the soil layer below 30cm to spend the winter.
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Prevention and control of diseases and insect pests of Codonopsis pilosula
Codonopsis pilosula is commonly used in China, which is widely planted in the north of China, with the functions of tonifying qi and nourishing blood, invigorating spleen and stomach, promoting fluid and clearing lung and so on. The main treatment of shortness of breath, Jin wound thirst, spleen and stomach weakness, loss of appetite, clear stool, lung deficiency cough and asthma, fever after weakness, qi deficiency prolapse and other diseases, a wide range of uses. The prevention and control methods of diseases and insect pests are introduced as follows: first, root rot often occurs during the period of high temperature and humidity from May to June in summer. It mainly occurs in the plants of Codonopsis pilosula in the growing period of more than 2 years. At the beginning of the disease, the lateral root near the ground
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