Eggplant Verticillium wilt, commonly known as half madness and black heart disease, has spread rapidly in recent years and is an important disease in eggplant production. Since the introduction of Taiwan's purple long eggplant variety “Nongyou 704†in 1995, the planting area has reached 233 hm2 or more per year. However, the occurrence of eggplant disease has become increasingly serious, with Verticillium wilt as the most common. Generally, after the onset of disease, the yield loss will be 20%-30%, and when serious, the loss will be more than 60%. Since 1997, our center has focused on strengthening the comprehensive prevention and control technology of the disease and achieved certain results. The main experience and technical measures obtained over the past few years are summarized as follows: 1 Causes and development rules The pathogen of Verticillium dahliae is Verticillium dahlia, belonging to the genus Verticillium spp. The mycelia, sclerotia, and chlamydospores lived in the soil with the diseased plants in the soil and could survive in the soil for many years. Germs can also winterize inside and outside the seed with conidia and mycelium. In the second year, the germ can directly invade through the root wound, the radicle epidermis, or the root hairs, first in the vascular bundle and then spread to the stem and fruit. In addition, diseased plants can also be transmitted as compost, and germs are spread in the fields through air flow, irrigation, and agricultural operations. Warm and high humidity is conducive to the epidemic of the disease, and the optimal temperature for onset is 20--30 degrees. In this temperature range, the higher the humidity, the more severe the occurrence occurs. In the eggplant flowering period to the fruit period, if there is more rain, or the land is low, it is easy to water; well water flood irrigation, or after the storm water, the water evaporates quickly, causing the soil to dry and cracked; the soil is sticky and heavy, and many crops are connected. The ground temperature is low or too high; the application of unripe organic fertilizer or lack of fertilizer and soil nematodes and underground pests are all conducive to the occurrence and development of diseases. 2 Symptoms of Verticillium dahliae are mainly responsible for the damage of the leaves, and they can be affected during various growth stages of eggplant. In the early stage of disease, pale yellow spots are produced between the lower leaves and veins, and gradually develop to the half of the leaves or the whole leaves turn yellow. The diseased leaves in the early days withered during the day and the night and rainy weather could be restored. The color changed from yellow to brown, and the leaf margin curled upwards. Finally, the leaves were dead and shedding. Diseases can spread upwards and can develop into the whole plant, sometimes also on the half leaf or half plant. The diseased plants are dwarf, with small and small fruits and brown stripes inside; the base of the stem is often rotted and the vascular bundles of stems and roots turn brown or brown. 3 Comprehensive Prevention and Control Technical Measures 3.1 Agricultural Control (1) Select disease-resistant varieties. Such as long eggplant No. 1, Longzagone No. 1 and so on. Selection of disease-free varieties can be selected from disease-free fields or from disease-free areas. Seeds should be disinfected before sowing, and can be soaked in warm water of 55 degrees for 20--30 minutes; or 70% pentachloronitrobenzene powder, and the amount is 0.2% of the seed weight. (2) Use seedless soil nursery or bed sterilization. Seedbed should be selected for high dryness, convenient drainage, soil fertile and pathogen-free plots. Before seeding, the seedbed soil should be fully sun-dried and full-fertilizer compost should be applied, and 50% carbendazim wettable powder or 70% pentachloronitrobenzene must be used for 8-10 g per m2 dose for bed disinfection. (3) Implement rotations. Rotation with rice for 1-2 years, and non-solanum vegetables rotation for 4- to 5-year. (4) using plug seedlings. One hole and one seedling of plug seedlings, the plants are distributed evenly, nutrients in nutritious soil are sufficient, and permeability is good. Therefore, the seedlings are thick and the roots are well-developed; the seedlings are generally planted without damaging the roots or the roots are light, and the seedlings are not returned after planting. Disease resistance. (5) Application of grafting seedling technology. According to systematic observation and data records, eggplant grafted seedlings have strong resistance to Verticillium wilt and bacterial wilt, and the incidence rate can be reduced by 4.7%-34.5%. (6) Enhancement of decomposed organic fertilizer, and topdressing with nitrogen, phosphorus, and potassium fertilizers, and timely cultivating and soil cultivation to promote root growth. (7) The diseased plants should be removed in a timely manner and taken out of the field and buried deep or burned. 3.2 Chemical control (1) When planting, 667 square meters of 5 kg carbendazim WP 5 kg of finely ground 100 kg of agitated soil, scattered in the planting hole for preventive treatment. (2) After colonization, the roots and ground may be sprayed with 70% of dexamethasone WP 500 times, or 50% of benomyl WP 1000 times, or 50% of DT bactericide 350 times, or for irrigation. Root processing. It is applied once every 10-14 days. (3) 50% carbendazim WP 500 times solution can be used for spraying at the beginning of the disease, or 70% thiophanate-methyl 500 times wet solution for irrigating, spraying (irrigation) once every 7-10 days Continuous spraying (irrigation) 2-3 times.