Eggplant brown scale disease is one of the most important diseases affecting the yield and quality of eggplant. It can be diseased from the seedling stage to the fruit harvest stage, often resulting in dead seedlings, dead branches and fruit rot, of which fruit rot has the greatest loss. During the transportation and storage of eggplant, the whole pile of rot is often caused by brown smut, which seriously affects the economic income of farmers. Therefore, it is of great significance to understand and master the occurrence and prevention of brownie disease in eggplant to increase eggplant yield, reduce losses and increase economic benefits. 1. Symptoms are mainly harmful to leaves, stems, and fruits, and mainly to fruit damage. Seedlings were sick, spindle-shaped brown pitted spots appeared at the base of the stem, and there were black small particles. When the conditions were appropriate, the lesions spread rapidly, the seedlings fell down, the leaves fell, the lower leaves suffered damage, and the leaves appeared greyish-white immersed round spots. Brown, the last round of many small black spots, late enlargement of the lesions, often caused by dry perforation of leaves, fall off, more than the stem in the victim, lesion spindle-shaped, brown edge, the central gray depression, and then expand the force dry rot ulcer Spots, dense black dots, diseased rings one week, the whole plant withered. The victim initially presented a light-brown, circular depression spot, which later expanded into a dark brown, round or irregular shape. There were obvious markings on the fruit and a number of small black spots were born. The diseased fruit in the later stage rotted or still hung on the branches. 2, the incidence of disease Eggplant Brown Vegetation with conidiospore or hyphae attached to the seed or the plant's disease on the body, become the main source of seedling early infection, conidia spread by wind and rain, insects or agricultural operations, Directly from the epidermis or wound invasion, conidia parasites in the epidermis of the host, so that the upper part of the leaves and stems of the disease, the minimum temperature for disease growth and development of 7 °C, the maximum temperature of 40 °C, the optimum temperature of 28 °C, when The greenhouse temperature is 28-30°C, and the humidity is above 80%. In the case of bacteria source, it can spread in 3-5 days. General greenhouse seedbeds encounter long-term rain, low-lying, high humidity, high temperature, poor ventilation, cold air, long fog, long growth, high density, easy to disease, and heavy damage. For poor drainage, soil viscosity, partial application of nitrogen fertilizer or defertilizer, sowing too early, planting too late, seedlings are seriously affected by underground or aboveground pests, replanting fields in old wards will aggravate the occurrence of brownie disease. Seed borne bacteria are the main cause of seedling blight and damping-off. They are also the medium for long-distance transmission of diseases. The pathogens in the soil and diseased bodies cause many plant stem ulcers, resulting in conidia. Further infestation of the leaves causes the onset of the disease. 3. Control measures 3.1 Selection of disease-resistant varieties: Shandong Zaofeng eggplant, Jilin white eggplant, Long eggplant No. 1 and so on. 3.2 Selection of plots: The land to be planted should be flat, deep in soil, fertile in soil, and well-drained sandy loam soil. 3.3 Rotation: More than 3 years of rotation of eggplant, pepper, tomato, and other vegetables outside the Solanaceae, and severe disease plot rotations will take longer. 3.4 Seed treatment: Select seeds full, no umbilicus dark brown seeds, seed disinfection method, a warm soup soaking, first with cold water to intervene the immersion 3 call -4 hours, and then soaked with warm water 55 °C for 15 minutes, or use Soaking seeds in warm water at 50°C for 30 minutes, immediately cooling with cold water, drying and preparing seeds, 2 soaking with chemicals, soaking seeds with 10% of "401" antibacterial agent 1000 times for 30 minutes, soaking with 300 times of formalin for 15 minutes, 1% high Potassium manganate solution soaked for 10 minutes, 0.1% copper sulfate soaked for 5 minutes, soaked after soaking, repeatedly washed with water, dry and dry, 3 seed dressing, with 50% benomyl WP and 50% thiram After each wettable powder is mixed with three parts of fine soil, it is dressed with 0.1% of the seed weight. 3.5 Disinfection of bed soil: The seedbed is selected from the clean and pure soil, bed soil disinfection method is made of 50% carbendazim WP or 50% methine WP 10 kg mixed soil 2 kg per square meter, when sowing, Take 1/3 of the medicine soil and spread it on the seedbed, and 2/3 of the medicine soil covers the seed. 3.6 Strengthen field management: Deep plowing, leveling, and leveling before planting, and applying adequately decomposed quality farmyard manure and compound fertilizer as base fertilizer. Avoid partial application of nitrogen fertilizer, the results of timely fertilizer in the later period, reasonable irrigation, planting to remove the diseased seedlings, the density should not be too large, increase the field asked the ventilation and light, the use of plastic film covering high ridge cultivation. The plant is densely planted in order to increase the ventilation and light transmission capacity of the field, and irrigation under the membrane is used to control the appropriate temperature and humidity, thereby reducing the humidity in the field and reducing the incidence. 50 kg gongdendazim WP was used in each (mu) greenhouse and evenly spread on the ground. 15 cm of cultivator was used to disinfect the soil. Each square meter of space used sulfur 5 g plus 80% dichlorvos 0.1 g and saw not 20 g After mixing, the shelter was ignited for 24 hours. The diseased plants, diseased fruits and diseased leaves were found to be removed (removed) in a timely manner and brought out of the park to be burnt or buried. In the later period of reproduction, to reduce the humidity in the field, a small amount of groundwater should be used. Method: Before the arrival of the rainy season, clean up the drainage ditch. Drain the water immediately after the rain to prevent the water in the ground area. 3.7 Chemical control: 1 75% chlorothalonil WP 500 times or 58% metalaxyl WP wettable powder 500 times or 64% WP wettable powder 6 times, or 50% Kedistan WP 500 times spray control, spray once every 5-7 days, alternating use of the above-mentioned different agents, a total of 2-3 times, can receive better control effect. 2 Results of the disease can be used 75% chlorothalonil WP 600 times or 70% dexamethasone WP 400-500 times or 65% dexamethasone WP 500 times or 1; 1:200 Bordeaux mixture Such as spray control, 3 smoke method, in the greenhouse can be used 10% chlorothalonil smoke agent or 20% speed Ke Ling smoke agent, or 10% chlorothalonil plus 20% quick-mixing smoke agent, each (mu ) 300-400 grams of medication, once every 5-7 days, a total of 2-3 times. 4 No matter what method is used, what kind of pesticides should be used for prevention and treatment. Before spraying, it is necessary to remove the diseased leaves and diseased fruits first, and to use the drugs in the early stage to achieve early detection and early treatment.