Prevention and control of new tomato virus disease in 09

Viral diseases are generally transmitted through the needle-type mouthparts of planthoppers, aphids, leafhoppers, etc. Therefore, antivirus focuses on insect prevention and does a good job of isolating such pests. If you find that there are such pests, you should take medicine in time, and once you get sick, it will be more difficult to cure.

In addition, it is necessary to choose varieties that are resistant to viral diseases. As for the new virus you are talking about, I don't know what it is. There was an outbreak of yellow aconolaus leaf disease in 07, and it was not new in 09.

The son of Lund is more professional, here is an introduction to the home remedies for the prevention and treatment of TY virus:

Jianlizhuang of Shanghai Shuaifeng Company cooperated with Jinggangmycin spraying, and continued to use it 3-5 times from the seedling stage, once every 7-10 days.

Symptoms: The field symptoms of tomato virus disease are very complex, and the main manifestations are four types: mosaic leaf type, fern leaf type, stripe leaf type and yellowing curl leaf.

Control methods: To control the occurrence and epidemic of tomato virus disease, we should pay equal attention to disease-resistant varieties and agronomic control, and combine comprehensive control measures with pesticide control: choose disease-resistant varieties.

Seed treatment. Before sowing, the seeds should be soaked in water for 3 4 hours, and then soaked in 10% trisodium phosphate aqueous solution for 40 to 50 minutes. Do a good job of cultivation and disease prevention measures before and after planting.

On the basis of heavy application of base fertilizer, phosphorus and potassium fertilizer, spraying Aiduo 6000 times liquid to enhance disease resistance. Shoot the branches late and prevent aphids early. Pharmaceutical prevention and control.

At the beginning of the disease, 800 times of plant disease emulsion or 500 times of 20% virus A wettable powder were sprayed. The shed with a severe disease was sprayed with 1000 times the liquid medical potassium permanganate, and the effect was better, and it was sprayed again every 5 7 days. When the sporadic occurrence of whitefly begins, alternately spray with 25% chloride wettable powder 1000 1500 times, or 25% thiamethoxam water dispersible granules 2000 3000 times liquid spray; Or smoke 200 grams of 22% dichlorvos smoke agent per mu in the protected area.

The main measures to control mixed tomato virus disease are:

First, variety selection and seed treatment.

Choose the right breed. In view of the main local poison sources, disease-resistant varieties were selected according to local conditions. In recent years, the new abundant varieties that have been bred in China to resist tobacco mosaic virus are:

Jiafen 15, Zhongza 9, Zhongshu 4, Zhongshu 5, Zhongshu 6, Zhongza 4, Jiahong, Jiafen 10, Zaofeng (Qincai 1), Lanyou Zaohong, Maofen 802, Zhongfeng, 542 Pink Tomatoes, Sukang 5, Sukang 7, Dongnong 702, Dongnong 703, Dongnong 704, Henan 3, Shuangkang 2, Xinfan 1, Wanhong 1, Xifen 3, Jinhong 1, etc. Cucumber mosaic virus resistant varieties are: 542 pink tomato, Zhongshu No. 5, Maofen 802 and so on.

Seed treatment. Soak the seeds with water for 3 4 hours before sowing, then soak the seeds in 10% trisodium phosphate solution for 20 30 minutes, rinse with water and then germinate and sow after fishing, or soak the seeds with potassium permanganate for 30 minutes.

Second, agricultural prevention and control.

Removal of sick and disabled bodies. The planting land should be rotated for more than 2 years; deep ploughing of the land, prompting the decay of poisonous diseased remains; Lime is applied where conditions are available to inactivate tobacco mosaic virus on diseased residues in the soil. Avoid aphids and prevent diseases.

It can be covered with a full furrow or a furrow with a silver-gray film, and the aphid-repellent effect of the silver-gray film can be used to reduce the spread of viruses by aphids; The protected area should be covered with mesh to reduce the entry of outdoor aphids into the shed to reduce the occurrence of viral diseases. Strengthen field management. Pay attention to the uprooting of diseased seedlings, pruning and pruning in the field to separate the sick and healthy plants, and use soap and water to wash hands and disinfect or dip milk to passivate the virus, so as to reduce the spread of viral diseases by humans.

Scientifically cultivated. Sow seeds in a timely manner to promote early onset, cultivate strong seedlings, plant early in time, and strengthen management. Using formula fertilization technology, spraying Aiduo 6000 times of liquid, or 7500 times of phytopon to enhance plant disease resistance, spraying 1 time of NS-83 resistance agent 100 times before and after planting, can induce tomato disease resistance and increase yield.

Third, chemical control.

At the beginning of the disease, spraying 1000 times of phytolingling emulsion, or 500 times of 20% morpholinoguanidine and ethyl copper wettable powder, or 200 300 times of mushroom proteoglycans, or 1000 times of potassium permanganate, in addition to spraying 50 100 mg of Zengxingling, 1% superphosphate, 1% potassium nitrate as extra-root top dressing, can improve disease resistance.

Hanting Wang Youfu diseased tomatoes.

Tomato virus disease, prevention first, first of all, to control aphids, planthoppers, etc., to control the source of infection. Severe diseased plants can be uprooted, and hydrochloric acid can be used. Morpholinoguanidine, riboside triazole.

Morpholine, bitter. Calcium. Sulfur compound, lentinan polysaccharide, Ningnanmycin, phytoling, etc. plus zinc sulfate plus amino acid foliar fertilizer plus imidacloprid spray.

Apply 2 to 3 sprays in a row 5 days apart.

It is necessary to make sure that the diseased plants are not caused by pesticides, fertilizers, bacterial, fungal diseases, insect pests, and similar symptoms that are not caused by nutrient deficiency or soil drought or waterlogging.

According to the conditions and transmission modes required for the occurrence of melon and vegetable virus diseases, comprehensive measures should be taken for different viruses and different varieties of melons and vegetables to effectively prevent and control virus diseases.

1) Choose excellent resistant and disease-resistant varieties.

For example, cucumber varieties such as Jinyan 7, Jinchun 4, Zhongnong 7, Zhongnong 8 and so on; varieties of small zucchini such as long vine zucchini, Atai 1st generation, and early green 1; Varieties of melons such as Elizabeth, Red City series.

2) Carry out seed treatment.

Soak seeds with 10% trisodium phosphate for 20 minutes before sowing, and then wash and germinate to sow seeds; It can also be soaked in 55 warm water for 40 minutes, or dried seeds can be heat-treated with an incubator for 70 days for 3 days.

3) Sowing at the right time.

Early seedling cultivation in spring, so that the plants can enter a more disease-resistant growth period before the arrival of the high temperature season; Autumn should be sown late to avoid high temperature and aphid migration and poison transmission period.

4) Control the vectors in a timely manner.

Hang yellow boards to trap aphids and whiteflies in protected areas, and hang blue boards to trap thrips; In the open field, silver-gray plastic film can be used to cover or hang silver-gray film strips to avoid aphids; Insect nets can be used to isolate aphids, whiteflies, and thrips from seedlings or cultivation in summer and autumn protected areas (color Figure 15); You can choose 10% Actai water dispersible granules 3000 times, or 20% Kangfu Duo concentrated solvent 3000 4000 times and other strong systemic agents with a long duration of effect to control aphids, whiteflies, thrips, reduce poisoning, such as spraying seedbed 2 3 days before transplanting (note that the liquid medicine in addition to the leaves should also seep into the soil) has a better effect on preventing poisoning.

5) Do a good job of field management.

In summer and autumn, shade nets are used to shade and cool down the protected areas; Apply enough organic fertilizer, timely top dressing, increase phosphorus and potassium fertilizer, timely and appropriate amount of watering, strengthen cultivation, agricultural operations should first strengthen the plant and then the diseased plant, the early disease seedlings should be pulled out as soon as possible, and the hands and farm tools that have touched the diseased plant should be washed and disinfected with soap and water.

6) Spraying antiviral agents.

At the early stage of the disease, you can choose 400 500 times of 20% virus A (morpholinoguanidine hydrochloride and copper) wettable powder, or 800 1000 times of phytolings (triasanol + copper sulfate + sodium dodecyl sulfate) emulsion, or 10% NS-83 (mixed fatty acids) water emulsion 100 times, or anti-poison No. 1 (mushroom proteoglycan) 200 300 times of water, or 2% Sterling (amino-oligosaccharides) 300 500 times of water. In order to enhance plant resistance and prevent, slow down or alleviate the occurrence of viral diseases, the above preparations can also be sprayed at the seedling stage as indicated.

Tomato virus disease is one of the most important diseases of tomato, which occurs widely in all parts of the country, which has a great impact on the yield and quality of tomatoes. The common symptoms include curly leaf type, mosaic leaf type, fern leaf type, stripe type and other types, and the incidence rate is the highest in the mosaic leaf type, followed by the fern leaf type, and the stripe type is less. The severity of damage was the heaviest in the stripe type, the middle in the fern leaf type, and the mosaic leaf type was lighter. For the disease, there is currently no special drug, and comprehensive measures can only be taken to inhibit the occurrence of the disease.

1.Onset symptoms.

Curved leaf type. It is a devastating tomato disease that has been discovered in recent years. After the onset of the disease, the yellowing of the upper leaves becomes smaller, the edge of the leaf is curled, and the leaf is wrinkled, thickened and curled; Difficulty flowering at the upper node, or no inflorescence; Infected plants grow slowly or stagnate, and are significantly dwarfed.

It's so fucking annoying, don't talk about it.

Recently, in the process of going to the countryside, I found that there was a virus disease in the tomatoes in the greenhouse, and the symptoms and prevention methods are summarized as follows

1. Symptoms of viral diseases.

The common symptoms of tomato virus disease are mosaic leaves, striped spots, and fern leaves. Mosaic type: one is a slight mosaic on the tomato leaves, the plant is not short, not deformed, the other is the leaves have obvious mosaic leaves, the new leaves become smaller, the leaves are small and narrow, twisted and deformed, the fruit is small and of poor quality, and it is mostly flower-faced.

Streak type: the upper leaves show dark and light green mosaic lesions, the upper middle of the stem initially shows dark green sunken short stripes, and then becomes dark brown sunken oil-soaked necrotic spots, the fruit is deformed, the flesh skin is sunken, and the long oil-soaked ring dead spots. Fern leaf type:

The diseased plant is obviously dwarfed, the edge of the lower leaf is rolled upward, and the upper leaf is small to form fern leaves.

2. Prevention and control measures.

1.Choose disease-resistant varieties. In view of the main local poison sources, disease-resistant varieties were selected according to local conditions.

2.Virus-free seed cultivation is practiced. Before sowing, soak the seeds with Qingxin oak water for 3 4 hours, then soak in 10% trisodium phosphate solution for 40 50 minutes, rinse with water after fishing, and then promote germination and sowing.

The planting site should be selected from the fields that have not been planted with tomatoes or have not developed tomato virus disease, and must be deeply cultivated.

3.Implement crop rotation and stubble. Avoid multi-year continuous cropping, reduce the transmission of tomato virus disease soil and residues, and reduce the occurrence of virus disease; Nursery plots and planting sheds should be completely cleared of toxic weeds and diseased plants to reduce the source of viral diseases; Promote formula fertilization technology.

4.Cultivation and disease prevention measures. The first is to sow seeds at the right time, cultivate strong seedlings, and require flower buds when planting, but not aging; the second is to plant early in time to promote the early emergence of strong seedlings; The third is to cultivate and hoe the grass, cultivate the soil in time, promote the roots, shoot late and harvest early.

5.Early protection against aphids and whiteflies. Nursery and planting sites should be used as soon as possible with 10% wettable powder aphid lice net control weeds and surrounding poisonous aphids, whiteflies, etc., to prevent the spread of aphids, whiteflies and other insect vectors, which can effectively prevent virus infection and reduce the occurrence of tomato blind skin virus disease.

6.Pharmaceutical prevention and control. Spray 2 times at the seedling stage with 800 times solution or 20% virus A600 times solution with 800 times solution of phytochloride, 1 time every 10 days after flowering, and spray 3 4 times in a row.

Planting disease-resistant varieties and planting grafted seedlings. Planting disease-resistant varieties is one of the main measures to prevent and control tomato virus disease, but most of the tomato varieties promoted in the current production are susceptible varieties, so it is particularly important to carry out seed disinfection before sowing, soak the seeds with water for 3 4 hours before sowing, and then soak them in 10% trisodium phosphate solution for 40 50 minutes, and then rinse them with water after removing them.

Choose disease-resistant varieties, clean up the seedbed in order to reduce disease, and clean up the surrounding weeds to eliminate the hidden danger of pathogens. Soil should be disinfected to reduce morbidity**.

Plant insecticides should be used, evenly sprayed on plant leaves, and should not be watered during the medication, otherwise there is no effect, you can spray several times.

Pesticides can be prepared according to the virus in tomatoes and then sprayed.

The prevention and control of viral diseases is first considered to be the prevention and control of whiteflies. Whiteflies carry germs and are constantly spreading the virus. Therefore, the prevention and control of whiteflies can also greatly reduce the occurrence of diseases.

Some insecticides such as thiamethoxam and dinotefurin can be sprayed regularly, and the agents can be alternated in between.

We can give him some fertilizer for this mold, which can make our vegetables grow more lush and healthy.

Spray it directly every seven days, and three times lightly cure the disease.