Control of main pests of Dangshen

The main pests in Codonopsis pilosula cultivation are aphids, ground tigers, grubs, mole crickets, red spiders, so how to control these pests?

Codonopsis pilosula alias Shangdang, Xidang, Dongdang, Lu Dang and so on, is a perennial herbaceous vine of Campanulaceae. The root is used in medicine. It has the functions of tonifying qi and nourishing blood, harmonizing spleen and stomach, promoting fluid, relieving thirst and clearing lungs. Originally produced in Shangdang County, Shanxi Province (now Changzhi City, Shanxi Province). It is cultivated in many places now.

Brief introduction of plant characteristics and varieties

1. Plant characteristics. The root is conical, fleshy, the tip is inflated, with most stem scars, commonly known as "lion head". The twining trailing stems are much branched, up to about 2 meters high. The young part has fine white hairs, the leaves are alternate, opposite or pseudowhorled, the leaf blade is ovate or broadly ovate, the base is nearly heart-shaped, and the whole body section has milk, with a special stench. Flowers light green, pedunculate. Capsule conical, seeds mostly small, brown glossy; florescence 8-September, fruiting 9-October.

2. Variety introduction. At present, there are many producing areas of Codonopsis pilosula, and the varieties and names are complex. according to the proximity and quality of the region, the products are divided into five types: the West Party, the East Party, the Bai Party, the West Party and the East Party, and the rest are family varieties.

II. Biological characteristics

1. Growth and development. Codonopsis pilosula likes a cool climate, and the alpine area with an altitude of 1800 Murray 3000 meters above sea level is more suitable for growth.

2. Requirements for environmental conditions. High temperature is bad for its growth. Strict requirements for light, seedlings like yin, after growing up like yang. Party ginseng taboo continuous cropping, continuous cropping is prone to diseases and insect pests. Potato is the best crop in the previous crop of Codonopsis pilosula.

3. The methods of pest control are introduced as follows:

Aphids mostly occur in summer and are serious in drought. They mainly absorb the sap of tender buds and leaves and make them dry up and die. Prevention and control method: can be sprayed with 40% dimethoate EC 1500 Mel 2000 times. Ground tiger, grub, mole cricket often occur in the seedling stage, harming the stem and root of the seedling, resulting in lack of seedlings and even reduced yield. Control method: ① uses 25 grams of chlordane EC mixed with 5 kilograms of fried wheat bran, add an appropriate amount of water to make poison bait and kill it in the field. ② irrigated around the rhizosphere with 50% zinc parathion EC 700Mel 1000 solution or 50% 1605 emulsion 1000 times. When ③ was damaged at seedling stage, 100 grams of 90% crystal trichlorfon and 5 kilograms of fried rapeseed cake were used to make poison bait. Red spiders harm seedlings and adult leaves, sucking sap, causing plants to wilt and even dry up. Control method: can be sprayed with 1500 times solution of 50% fenitrothion.