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What are the control methods for tea plant purple root rot?
Distribution and symptoms: It is found in all tea-producing areas, but occurs fairly commonly in North China and East China. This disease mainly occurs at the seedling stage and the mature plant stage, damaging the roots or the root collar. First the fibrous roots rot, turning brown or dark brown, then it spreads to the lateral roots, which after rotting turn purplish brown. The surface of the lesions is covered with purplish brown thread-like matter, and on the surface of the diseased roots there are hemispherical granular sclerotia. The base of the small stem plus cm is often surrounded by purplish red mycelium, soft in texture; it peels off easily, and the root cortex also peels off easily. In severe cases the aboveground part wilts, new shoot sprouting decreases, and the diseased plant dies. Occurrence pattern
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Detailed Explanation of Key Techniques for Straw-Based Cultivation of Lotus Root in Shallow Ponds
Straw-based cultivation of lotus root in shallow ponds gives high yields, is easy to harvest, saves water and labour, and the planting area is expanding year by year. The average yield is 4000 kg of lotus root per mu, more than 30% higher than that of ordinary shallow-pond lotus root. 1. Choosing suitable varieties. For seed lotus root, choose early-maturing varieties with thick, round rhizomes, white skin, crisp and tender flesh, sweet taste, good quality and high yield, such as 'Elian No. 4', 'Elian No. 5', 'Jinan White Lotus Root', etc. 2. Building the lotus pond 1. Site selection and material preparation: the lotus pond should be chosen in a sunny place without shade from trees, such as village-edge wasteland, abandoned house sites, disused pits and ponds, low-lying abandoned land, etc.
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Master the correct method when earthing up ginger to avoid damaging the roots
Ginger needs to be earthed up several times during its growth period. It is understood that the mechanical earthing-up machine used locally in Anqiu causes more serious root damage to ginger than manual earthing up, because the furrow bottom formed by the earthing-up machine is about 20 cm wide and the ridge height is 40 cm, while manual earthing up with a hoe leaves a furrow bottom of about 10 cm and a ridge height of around 35 cm. "When the earthing-up method cannot be changed, excessive root damage can be avoided by adjusting the growth direction of the underground ginger tubers, that is, when sowing the seed ginger, deliberately place the seed ginger perpendicular to the planting row, so that the daughter ginger and granddaughter ginger are also perpendicular to the planting row. By the time of earthing up, the entire ginger tuber is then perpendicular to the planting row, while the fleshy roots, lateral roots and fibrous roots caused by earthing up extend along the direction of the planting row, so they will not be damaged too much during earthing up. If the underground seed ginger is sown parallel to the planting row, too many roots will be damaged during earthing up." said Liu Shinian of Qianyulin, Linghe Town, Anqiu City.
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Detailed Explanation of the Method for Sprouting and Raising Black Locust Seedlings from Root Segments
Black locust (Robinia pseudoacacia) is tolerant of drought and poor soil and grows quickly, making it a good tree species for rural landscaping around homes and for block planting. If the root-segment sprouting method is used for raising seedlings, it is not only low in cost and simple to carry out, but the seedlings are also of good quality. 1. Site selection and bed preparation Choose a nursery site that is sheltered from the wind, faces the sun, has level ground and good drainage as the hotbed. Before making the beds, apply 1000 kg of organic fertilizer per mu, and 50 kg each of ammonium bicarbonate and superphosphate; after plowing and harrowing level, scatter a 100:1 bait of bran and methamidophos on the bed surface to prevent damage from underground pests such as mole crickets. The beds should run north-south, 1.5 m wide and about 12
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Research and Analysis of High-Efficiency Lotus Root Cultivation Models: A Case Study of Lotus Fields in Caidian District
Lotus root is one of the pillar agricultural industries of Caidian District, Wuhan City. In 2006, the planting area was 10,000 hectares, the total output was 200,000 t, and the total output value was 320 million yuan, accounting for 18.2% of the district's total agricultural output value. In order to improve the economic benefits of lotus fields, Caidian District promoted several high-efficiency lotus field cultivation models and achieved good results. In 2006, the promoted area of the models in the district reached 7,730 hectares, accounting for 77.3% of the district's lotus root planting area. The main models promoted and applied in recent years are introduced below.
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What are the storage techniques for lotus root? Detailed explanation of key methods
For storage, lotus root must be strictly selected: disease-free and undamaged underground stems with a firm texture, thick and plump flesh, and low water content. After harvest, do not wash them; store the whole roots with mud on the surface. They can be stored in shallow pits dug indoors, covered with straw or soil. Alternatively, they can be layered with sand in a storage facility, with the surface covered with 5-10 cm of sand. The covering must not be too thin, otherwise the tubers on the surface layer are prone to dehydration and loss of freshness. If the humidity is too high, they are prone to rooting and mildew rot. According to experiments, in a refrigerated warehouse at 5-7°C (finally, 11°C) and in an ordinary underground cellar (9-14°C in winter, 23-25°C in summer), buried with dry sand
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Detailed Explanation of Lotus Root Field Rotation and Crop Succession Cultivation Models
Lotus root is an important aquatic vegetable in China and also an important export-oriented cash vegetable. It is widely cultivated in areas south of the Huang-Huai region, especially in the Yangtze River Basin and areas further south. It not only plays an important role in increasing farmers' income and improving agricultural efficiency, but also has important value in improving and beautifying the environment, and in wetland protection and utilization. Centering on lotus root and implementing good rotation and crop succession is important for fully improving land utilization rate and economic benefits per unit area, reducing pest and disease damage, reducing pesticide use, improving soil, and enhancing soil fertility.
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How to Make Candied Lotus Root and Detailed Steps
1. Material selection. Choose fresh lotus root with a slightly yellow skin, pure white flesh, and a root diameter of 40-50 mm; and white sugar that is clean and white, with uniform granules, transparent, and meets hygiene standards. 2. Pre-processing. Wash the lotus root thoroughly in clean water, cut off the root ends, then rinse several times in clean water. Prepare a 2.5% sodium hydroxide solution and heat it to 90°C. Then put the washed lotus root into the sodium hydroxide solution and stir constantly. When the skin of the lotus root begins to peel off, remove it and rinse in clean water until
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A detailed introduction to several propagation methods for lotus root
Several propagation methods for lotus root
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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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