Zhang Deyang, a large vegetable planter in Shouguang, Shandong Province, passed MMS (138****7459) on September 9. Q: Recently, there are many symptoms of withered death in the local greenhouses and in the eggplants planted in open fields. What is the disease?
China Insurance Group Plant Protection Information Feedback Center A: The reader's feedback is typical. Some time ago, in many areas in Shandong, it was discovered that some plants in the eggplant field in the open field were dry, and a nearby plant was also evident. The wilting and dead state of the eggplant plants was observed after the removal of the eggplant plants. It was not a blight. Fusarium wilt plants usually began to grow yellow wilting from the base leaves, opened the stalk near the ground, and blackened the vascular bundles; Faster, the leaves will dry without losing the green, and the stems will be squeezed and the grey purulent will appear. However, these plants do not have these symptoms. In the base of the eggplant stems, there is a plexus of filamentous material that comes close to one another and resembles the taste of edible mushrooms.
Comprehensive analysis can clearly determine that the disease is eggplant white tinea disease.
Eggplant whitefly disease mainly damages the stem base. The diseased disease department initially showed dark-brown water diffuse-spotted spots, and produced a white shiny silky mycelium, causing the cortex of the stem to rot, and finally dry off or the whole plant died. Whitefly is a kind of soil-borne fungus disease that has a wide range of parasitic diseases. There are only 20 kinds of vegetables, such as cucumbers, eggplants, leeks, and kidney beans.
After onset, the leaves and petioles of the plants withered and the leaves did not fall off. Some leaves are yellow, others are always green, and finally the whole plant withers, but the roots are generally intact. The disease mainly depends on the radial spread of the surface hyphae. The disease has a central diseased strain, and the high temperature and high humidity are conducive to the occurrence and prevalence of the disease. The temperature is about 30°C, and the relative humidity is above 95%. Through inspections, the management of extensive, over-watered, low-lying, poorly-drained plots, the occurrence of white peony disease.
Eggplant blight, can be controlled by the following methods:
1. Comprehensive prevention: Level up the land as much as possible before sowing to avoid the accumulation of water in the field. Controlling the planting density and adopting a wide and narrow row spacing will not only benefit the ventilation and light transmission in the field, reduce the occurrence of diseases, but also facilitate field operations and improve management efficiency. Balanced fertilization, especially Excessive use of nitrogen fertilizers, adequate use of phosphate and potassium fertilizers. Special attention must be paid to the application of farmyard manure prior to the application of decomposed fermentation, otherwise unripe manure fertilizer is more conducive to the occurrence of a variety of diseases and insect pests.
2. Artemisinin (6% oligosaccharide chain protein) is used skillfully to treat seedlings, so that the crop is not susceptible or susceptible to light. Altaline is a biological regulating substance. It activates the immune system of crop plants and resists the infestation of bacteria. At the same time, it also promotes the production of more lignin in eggplant. The stem of the eggplant stem is denser and prevents the invasion of pathogens. Before the eggplant is transplanted, a bag of water (15 grams) of Ateling spray seedlings is planted on the barrels, and after planting, the flowering, the pre-flowering, and the fruiting period. Spraying alone or with other agents can greatly reduce the occurrence of diseases.
3. Remove the central disease strain: In the early stage of disease, locate the central diseased plant in time. The central diseased plant is the basis for disease expansion and should be removed early and taken out of the field for destruction.
4. After mixing with medium-term carbon (40% Duofu Bromoacetonitrile) 500g plus 40% pentachloronitrobenzene 500g mixed fine dry soil 40kg, spread the disease points and surrounding soil, and then watering, Disinfect. You can also use Xiu Miao (3% Metalaxyl Hymex Agent) 800 times solution, plus Zhongbao Atai Ling spraying the ground, irrigating the hole or applying 1-2 times, but pay attention to the amount of liquid Penetrate to the root of the eggplant.
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