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The main causes of eggplant wilting are blight, sclerotinia, stem rot, bacterial wilt, verticillium wilt, root knot nematode, and fertilizer. The specific diagnosis is as follows:
1. Look at the distribution of the field. When a fattening occurs, it usually occurs at noon on sunny days, and returns to normal in the evening, which can cause serious plant death. For the other diseases mentioned above, the distribution shape of the field is a patch distribution.
2. See if the root has a root knot. Root knot nematode disease occurs, and root knots of varying sizes can be seen at the roots. The other diseases above have no root knot.
3. See if the vascular bundle is brown. The vascular bundles of eggplant verticillium wilt and bacterial wilt are browned, and the above other diseases have no such symptoms. These two diseases do not show symptoms at the seedling stage and begin to manifest after the flowering results. However, from the bottom to the top of the disease, the vascular bundle of the diseased stem is yellowish brown. When wet, the stem base produces white mildew, and irregular yellowish patches appear between the leaf margin and the vein, and the main vein remains. Green, brown palm-shaped mottled, the site of the disease is dead, flowery, and sometimes "half-mad" phenomenon. In the pathogenic bacterial wilt disease, the middle and lower cortex are rough, and often have long and short ridges and adventitious roots, sometimes with oily brown irregular spots on the diseased stem. If the diseased stem is cross-sectioned, it is slightly squeezed, and there is milky white mucus overflow (bacterial pus).
4. See if the roots are rotten. The root or root of the eggplant root rot, the skin is brown and rot, and easy to peel off, causing the xylem to be exposed. The other diseases above do not have this symptom.
5. See if the base of the stem and the bifurcation are rotten. Stem-based rot only damages the base of the stem. Most of them produce water-stained dark spots on the top and bottom of the soil surface, and rapidly spread to the surrounding area. The hand is pinched and soft, and the leaves turn yellow from bottom to top and then wilted. After the lesion was wrapped around the stem for 1 week, the plant died rapidly and the underground part was normal. Sclerotinia sclerotiorum is mostly infected from the fork part of the stem, grayish white, slightly sunken, phloem rot, and its mycelium can invade the diseased stem, and the epidermis is longitudinally split, the lesion size, shape, length varies, edge water stain, White cotton-like hyphae and black sclerotia are formed on the surface and the diseased stem, and the diseased part is wilted and dead; in the upper part of the plant, symptoms of "bending" can be formed. Most of the disease occurred from the stem base and branches, and it was initially water-stained. It quickly surrounded the branches and stems, turned brown or dark brown spots, and spread up and down. The edges were not obvious and slightly depressed.
Bacterial bacterial wilt: In the early stage of the disease, 72% of agricultural streptomycin was used to irrigate the roots, and the other was sprayed 400 times with diclosan.
Verticillium wilt: After planting the seedlings, the roots are filled with 70% red sun WP 400 liquid, 0.3 kg per drug solution, once every 7-10 days, and even 2-3 times. In the early stage of the disease, soil disinfection or rooting was carried out with 70% red sun wettable powder 800 times. Each plant was used with 1000 ml, once every 10 days, and even 2-3 times.
Epidemic disease: At the beginning of the disease, it can spray 70% red sun WP (methyl thiophanate) 800 times, 50% work suspension 500 times liquid. Spray once every 7 days, even spray 2-4 times.
Stem-based rot: Spray 1200 times solution of 20% methyl chlorophosphorus emulsifiable concentrate at the initial onset, mainly spraying the base of the stem of the plant. It can also be coated with pentachloronitrobenzene powder 200 times solution and 50% Fumei double wettable powder 200 times solution in the diseased part, the effect is better.
Root knot nematode disease: 15 days before sowing or planting, use 10% gram phosphorus, 50% Yishuning, 3% Miller and other granules, mix evenly, and then plow the soil into the soil, apply per acre The amount is 3-5 kg. After planting, the plant is partially damaged in the shed, and 1500 times of 50% phoxim emulsifiable concentrate, or 1000 times of 80% dichlorvos emulsifiable concentrate, 0.25-0.5 kg per planting solution can be used to smoke root knot nematodes in the soil.
Fertilizer: When fat damage occurs, it is necessary to timely water, and spray 0.01% Tianfengsu EC in 3000-4000 times in time to effectively alleviate the damage.
Sclerotinia sclerotiorum: In the early stage of the disease, 70% red sun wettable powder 800 times liquid foliar spray is used for prevention and treatment, once a week, even spray 3 times.
1. Look at the distribution of the field. When a fattening occurs, it usually occurs at noon on sunny days, and returns to normal in the evening, which can cause serious plant death. For the other diseases mentioned above, the distribution shape of the field is a patch distribution.
2. See if the root has a root knot. Root knot nematode disease occurs, and root knots of varying sizes can be seen at the roots. The other diseases above have no root knot.
3. See if the vascular bundle is brown. The vascular bundles of eggplant verticillium wilt and bacterial wilt are browned, and the above other diseases have no such symptoms. These two diseases do not show symptoms at the seedling stage and begin to manifest after the flowering results. However, from the bottom to the top of the disease, the vascular bundle of the diseased stem is yellowish brown. When wet, the stem base produces white mildew, and irregular yellowish patches appear between the leaf margin and the vein, and the main vein remains. Green, brown palm-shaped mottled, the site of the disease is dead, flowery, and sometimes "half-mad" phenomenon. In the pathogenic bacterial wilt disease, the middle and lower cortex are rough, and often have long and short ridges and adventitious roots, sometimes with oily brown irregular spots on the diseased stem. If the diseased stem is cross-sectioned, it is slightly squeezed, and there is milky white mucus overflow (bacterial pus).
4. See if the roots are rotten. The root or root of the eggplant root rot, the skin is brown and rot, and easy to peel off, causing the xylem to be exposed. The other diseases above do not have this symptom.
5. See if the base of the stem and the bifurcation are rotten. Stem-based rot only damages the base of the stem. Most of them produce water-stained dark spots on the top and bottom of the soil surface, and rapidly spread to the surrounding area. The hand is pinched and soft, and the leaves turn yellow from bottom to top and then wilted. After the lesion was wrapped around the stem for 1 week, the plant died rapidly and the underground part was normal. Sclerotinia sclerotiorum is mostly infected from the fork part of the stem, grayish white, slightly sunken, phloem rot, and its mycelium can invade the diseased stem, and the epidermis is longitudinally split, the lesion size, shape, length varies, edge water stain, White cotton-like hyphae and black sclerotia are formed on the surface and the diseased stem, and the diseased part is wilted and dead; in the upper part of the plant, symptoms of "bending" can be formed. Most of the disease occurred from the stem base and branches, and it was initially water-stained. It quickly surrounded the branches and stems, turned brown or dark brown spots, and spread up and down. The edges were not obvious and slightly depressed.
Bacterial bacterial wilt: In the early stage of the disease, 72% of agricultural streptomycin was used to irrigate the roots, and the other was sprayed 400 times with diclosan.
Verticillium wilt: After planting the seedlings, the roots are filled with 70% red sun WP 400 liquid, 0.3 kg per drug solution, once every 7-10 days, and even 2-3 times. In the early stage of the disease, soil disinfection or rooting was carried out with 70% red sun wettable powder 800 times. Each plant was used with 1000 ml, once every 10 days, and even 2-3 times.
Epidemic disease: At the beginning of the disease, it can spray 70% red sun WP (methyl thiophanate) 800 times, 50% work suspension 500 times liquid. Spray once every 7 days, even spray 2-4 times.
Stem-based rot: Spray 1200 times solution of 20% methyl chlorophosphorus emulsifiable concentrate at the initial onset, mainly spraying the base of the stem of the plant. It can also be coated with pentachloronitrobenzene powder 200 times solution and 50% Fumei double wettable powder 200 times solution in the diseased part, the effect is better.
Root knot nematode disease: 15 days before sowing or planting, use 10% gram phosphorus, 50% Yishuning, 3% Miller and other granules, mix evenly, and then plow the soil into the soil, apply per acre The amount is 3-5 kg. After planting, the plant is partially damaged in the shed, and 1500 times of 50% phoxim emulsifiable concentrate, or 1000 times of 80% dichlorvos emulsifiable concentrate, 0.25-0.5 kg per planting solution can be used to smoke root knot nematodes in the soil.
Fertilizer: When fat damage occurs, it is necessary to timely water, and spray 0.01% Tianfengsu EC in 3000-4000 times in time to effectively alleviate the damage.
Sclerotinia sclerotiorum: In the early stage of the disease, 70% red sun wettable powder 800 times liquid foliar spray is used for prevention and treatment, once a week, even spray 3 times.
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