Lotus root is a kind of high-yield and high-efficiency aquatic economic crop. It is a kind of vegetable that the people eat. It is widely cultivated everywhere. With the adjustment of industrial structure, the cultivated area has been continuously expanding. In recent years, the occurrence of lotus root disease has become increasingly serious and has become a major obstacle to the development of lotus root production.

First, the common diseases of lotus root

1. Lotus root disease, also known as black root disease, mites. It is the first major disease in the production of lotus root, and it is generally susceptible to disease in the old paddy fields and continuous cropping fields with shallow and shallow layers of cultivation, which will affect the yield and reduce yield. It is a disease of lotus root which is caused by the infection of R. sphaeroides. It mainly harms underground stems, aboveground leaves and leaf surfaces. The stems and leaves with light green color were light green, brown and dry from the leaf margin, and the petiole was finally dead. Most of the bacteria invade the wound, absorb roots or growth points, and pathogens spread with water irrigation.

2. Lotus leaf blight is the second most serious disease on lotus root, and the pathogen is the pathogenic fungus of the monofilament genus. The main harm to the lotus leaf, the lotus leaf edge first appeared pale yellow lesions, and then gradually spread to the middle of the leaves, was yellow-brown, and finally expanded from the mesophyll to the veins until the onset of disease, poor paddy field fertility, severe disease.

3. The leaf spot of lotus root is mainly harmful to the leaves, and sometimes it can also occur on the petiole, which is caused by the damage of pathogenic fungi of the genus Rodius.

Second, lotus root disease, comprehensive prevention

1. Implement a 2-3 year rotation. In particular, the rotation of floods and droughts plays an important role in reducing disease.

2. Selection of disease-free species All species of bacterium are the main source of fungal pathogens. To prevent the disease, the key is to select cultivars from the disease-free cultivars for cultivation and eliminate the bacterium source. After spraying 50% carbendazim or thiophanate-methyl 800 times or 75% chlorothalonil WP 800 times, cover with a plastic film for 24 hours after sealing and sterilize, and air dry the seeds.

3. Eradicate the diseased plants to completely remove the diseased field and diseased bodies, and deeply or concentratedly burned. Before planting, 50-100 kilograms of lime is used per acre to sterilize and clean the pastoral area, and accelerate the decomposition of organic fertilizer.

4. Reasonable fertilization Basal fertilizer should be dominated by organic fertilizer, and the fertilizer must be fully decomposed. For soils with acidic soils and strong reducing properties, lime should be re-used. Lime should be applied early and applied. During the growth period, attention should be paid to the application of nitrogen phosphate fertilizers. Silicon fertilizers should be added wherever possible, and supplemental boron, zinc, molybdenum, and other trace fertilizers are recommended. Do not apply chemical nitrogen fertilizers to improve plant disease resistance.

5. Scientific management of water during the sick period of deep water irrigation, reducing ground temperature inhibit germ propagation. Keep soaked fields in deep water every day, do not drain water and turn over the sun. Non-reserved farms must cut down the horticultural tillage or dig hoe after harvesting lotus seeds, and it is best to plant a winter crop. For those who don't plant winter crops, they should also plunge and flood the fields to reduce the contamination of soil and diseased bodies.

6. Timely medication control. At the beginning of the disease, use 50% carbendazim WP 600-800 times, or 50% TOPOX WP 800-1000 times, or 50% carbendazim WP 600 times 75% chlorothalonil 600 times liquid spray. It is also possible to use the above-mentioned mixed powder 500 grams of fine soil 25-30 kg, heap boring after 3-4 hours into the shallow water layer of lotus root, 2-3 days after the above mixture 600 times or 70% thiophanate-methyl 800 Double fluid, carbendazim 200 times liquid mixing "402" 4000 times liquid, spraying foliar or petiole, even spray 2-3 times, can effectively reduce or control the spread of the disease.

For flower type operation lamp, it has two types of lamp head, one is big one, it has 64 LED bulbs which from Germany osram, another small one, it has 45 LED bulbs, also from Germany. the surgical lamps bulb can last long for 8 hours, that is one of the reasons which our surgical lamp has low maintainance rate. for Double Dome Surgical Lamp, can constituted by one big+one big lamp head, one big+one smal lamp head and one small+ one small lamp head, it can be choosed depends on users' requirment; 

the flowet type OT lamp has functions of Bright and Uniform illumination; Outstanding color temperature control performance; Supramaximal effective light field;Electric focusing system;

Double Dome Flower Ot Lamp

Double Dome Flower Ot Lamp,Double Dome Ot Lamp,Double Dome Operation Lamp,Double Dome Surgery Light

Shandong Lewin Medical Equipment Co., Ltd. , https://www.lewinmed.com