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Symptom Identification and Control Methods of Root Rot in Codonopsis pilosula
The pathogen is a type of imperfect fungus among the fungi, and it is divided into two types: chronic onset and acute onset. In the chronic type, the disease begins in mid to late May. In the early stage of the disease, dark purple lesions appear on the lower fibrous roots or lateral roots, which then turn black and rot. After the disease spreads to the main root, it gradually rots from bottom to top. The remaining unrotted part is mostly a "half-section ginseng," and the area near the rotted part is dark brown. The stems and leaves above ground gradually turn yellow and eventually die. In the acute type, the disease mostly begins in mid to late June. Once the ginseng root is infected, almost the entire ginseng root becomes diseased at the same time
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What kind of environmental conditions does Codonopsis pilosula cultivation require?
Codonopsis pilosula is also known as three-leaf vegetable, single leaf, and stinking codonopsis. It is a perennial climbing herbaceous plant of the Campanulaceae family. Codonopsis pilosula is a commonly used traditional Chinese medicine, originally from Shangdang, Shanxi; its root resembles ginseng, hence the name codonopsis. The root is used medicinally and has the functions of tonifying qi and nourishing blood, harmonizing the spleen and stomach, promoting fluid production and clearing the lungs. There are many varieties of codonopsis medicinal material, such as Western codonopsis, mainly produced in Gansu, Shanxi, Sichuan and other provinces; Eastern codonopsis, mainly produced in the northeastern provinces; Lu codonopsis, mainly produced in Shanxi, Henan and other provinces. The Tai codonopsis among the Western codonopsis is especially the best in quality. Codonopsis is a deep-rooted plant that prefers a cool and moist climate.
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What are the control methods for rodent damage to codonopsis (Codonopsis pilosula)?
They begin to damage the seedlings when the seedlings emerge 5 cm above ground. Control methods: (1) Mix 1 part of 3% zinc phosphide with 95 parts of green vegetables, beans, rice, etc.; after mixing well, scatter the bait in the evening in places where rats frequently appear or at their burrows. (2) Mix 1 part of 0.5% bromadiolone evenly with 3 parts of flour, then add cut apple pieces, vegetables, and fried dough sticks (cut into 1 cm pieces) and mix them evenly to coat; this can be placed in the evening in places where rats are frequently active. Alternatively, use 2.5% phorate granules at 1500 g per 667 sq m mixed with 10 kg of fine soil and scatter it along the edges of beds and ridges to drive rats away; be careful not to scatter it on the seedlings.
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Symptoms and control methods of downy mildew in codonopsis (Codonopsis pilosula)
Irregular brown lesions appear on the leaf surface, and a gray mold-like growth (conidiophores and conidia) appears on the underside of the leaves, which can cause the plant to die. Control method: remove diseased plants and fallen leaves and burn them in a centralized manner; during the disease period, spray 300-fold dilution of 40% Shuangyiling or 1000-fold dilution of 70% chlorothalonil, once every 7 to 10 days, for 2 to 3 consecutive times.
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Introduction to the New Codonopsis Variety 92-02
I. Variety Introduction: Codonopsis pilosula is one of the main medicinal herbs in Dingxi City, Gansu Province, with a planting area of about 18,700 hm2 over the years and a total output of more than 30,000 t, accounting for 40% of China's Codonopsis pilosula share. In 2001, Weiyuan County of Dingxi City was named "China's Hometown of Codonopsis pilosula" by the Organizing Committee of the Hometown of Specialty Products of the Chinese Association of Agricultural Science Societies, and the Codonopsis pilosula industry has become one of the important pillar industries of Dingxi City. However, the Codonopsis pilosula currently planted in fields is basically a mixture of multiple types, which has adversely affected yield and quality and severely restricts the sustainable development of the Codonopsis pilosula industry. Therefore, breeding
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Symptom Identification and Control Methods of Rust Disease in Codonopsis pilosula
It damages the leaves. The diseased area on the underside of the leaf is slightly raised, forming the uredinium, which later ruptures and releases orange-yellow urediniospores. The disease is most severe from June to July. Control methods: (1) Clear away withered branches and fallen leaves in winter. (2) During the disease period, spray with a 200-fold dilution of 50% dinitro compound or a 400-fold dilution of 97% sodium dithiocarbamate, once every 7 days, for 2 to 3 consecutive applications.
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What are the main medical effects of Codonopsis pilosula?
Medical effects of Codonopsis pilosula. Codonopsis pilosula is sweet in flavour and neutral in nature, entering the spleen and lung meridians. It has the effects of tonifying the middle and boosting qi, strengthening the spleen and benefiting the lungs, and quenching thirst and promoting fluid production. It is used to treat conditions such as weakness of the spleen and lungs, weakness of the spleen and stomach, insufficiency of lung qi, shortness of breath and palpitations, poor appetite and loose stools, asthmatic cough due to deficiency, internal heat with wasting-thirst, and fatigue and weakness. It is a commonly used tonic and strengthening medicine.
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What are the growth habits of Codonopsis pilosula? Understand these characteristics to grow it better
Codonopsis pilosula is a perennial herbaceous vine. It prefers a mild climate, cool summers and a humid atmosphere. It is cold-hardy, and after planting, the roots can overwinter in the soil in the open field. It has strict light requirements: seedlings prefer shade and moisture, so avoid direct sun during the seedling stage; once established, the plants prefer sun. Codonopsis pilosula requires deep, loose soil, with fertile sandy loam being the best. It dislikes saline-alkaline soil, clay and low-lying land, and is not suitable for continuous cropping.
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How to prevent and control damping-off of codonopsis (Codonopsis pilosula) seedlings?
The disease mostly affects the base of the stem below the epidermis, at the boundary between dry and moist soil. It begins as yellow-brown sunken lesions; as the lesions enlarge they girdle the stem and gradually penetrate into the stem, causing rot and death. Once infection occurs it spreads rapidly, killing plants in patches. Control methods: choose well-drained sandy soil with good ventilation, and increase phosphorus and potassium fertilizer. Treat seeds with 50% carbendazim wettable powder or 65% zineb wettable powder at 0.2%-0.3% of the seed quantity; alternatively, use 50% carbendazim wettable powder or 65% zineb wettable powder
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Identification and Control Methods for White Grub Infestation in Codonopsis pilosula
Belonging to the order Coleoptera, family Scarabaeidae. It is the larva of the scarab beetle, mainly active in the soil, damaging the roots of Codonopsis pilosula. White grubs generally have one generation per year, with larvae or adults overwintering in the soil. After temperatures rise in the following spring, white grubs gradually move upward in the soil; when the soil temperature reaches above 15°C, they move into the topsoil layer above 10cm to feed. When summer temperatures rise and the soil dries out, they descend to deeper soil layers and stop feeding or moving. In autumn they return to the topsoil layer to be active, and after October they successively burrow down below 30cm to overwinter.
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