Tomato, what s wrong, is it a pesticide hazard??

If the growth is stunted, if it is inhibited in a large area, it is a pesticide damage, and if it is a single plant, it may be a viral disease. Viral diseases, ** difficult, should be based on prevention, such as spraying amino-oligosaccharides + zinc fertilizer, for alleviation, ningnanmycin or morphinguanidine + zinc fertilizer + thiamethoxam and other stinging and sucking mouthparts insecticides, zinc fertilizer has the effect of passivating the virus.

Generally, the tomatoes grown in the farmland will more or less use the pesticide of pesticide oak, so that the yield can be higher. If the pest is bad, the corresponding pesticide will be used more. It is best to wait for the tomato to bloom before spraying pesticides, otherwise it may cause damage to the flowers.

The sprayer should be cleaned before the coarse application of the clump to avoid adverse consequences of the residual agent on the tomato.

Tomato spraying. Generally, tomatoes grown in farmland will use pesticides to a greater or lesser extent, and if the pest is severe, the corresponding pesticides will be used more.

Tomato pesticide time.

It is best to wait for the tomato to bloom before spraying pesticides, otherwise it may cause damage to the flowers, and it is best to avoid Liang Dan at noon and spray in the evening to prevent pesticide damage.

Tomato pest control drugs.

1. Disease spraying:

Tomato stripe spot virus disease: this disease should be sprayed early when it is prone to occur, and amino-oligosaccharides or ningnanmycin water can be used.

Tomato bacterial canker disease: At the beginning of the disease, spray copper succinate fertilizer, copper hydroxide, copper ammonia, etc., spray once every other week, 3 to 4 times in a row.

2. Pest spraying:

There are many kinds of tomato diseases, mainly including virus disease, late blight, gray mold, leaf mold, early blight and canker. Generally, 20% pyrethrin 1500 2000 times liquid irrigation is used for root control.

3. Contraindications for pesticide use:

Tomatoes should avoid using pesticides that are not labeled or registered. The sprayer should be cleaned before application to avoid adverse consequences of residual pesticides on tomatoes.

How to alleviate the drug damage?

Reason analysis: The resistance of vegetables varies greatly in different periods, such as after cloudy days, more fruit set, and after watering, the resistance will decrease. In addition, it is also affected by factors such as spraying equipment, spraying time, spraying method, etc. The same drug formula, used in different periods and by different people, some have drug damage, and some do not have drug damage, which is normal.

Solution: First, spray water to rinse the damaged parts, knock off some of the seriously damaged leaves, and reduce the absorption of agents, especially those with strong systemic properties, which is very important.

The second is to spray pesticides to alleviate symptoms, caused by fungicides and insecticides, generally with brassinolide 1500 times, love more than 6000 times and other plant growth regulators, with chitin 1000 times or alginic acid 1000 times, urea 300 times spraying, adjust the growth state of plants, promote plant growth recovery.

The third is to appropriately increase the night temperature, strengthen fertilizer and water management, and apply part of the high-nitrogen fertilizer to improve the growth of plants.

Autumn tomato fruit rot at the fruiting stage is mainly caused by soft rot, brown rot and anthracnose, and strengthening scientific management and preventing three diseases is an effective way to control fruit rot.

Tomato rot is generally caused by bacterial infection, which is often caused by poor weather or improper time during tomato pruning management, causing disease and disease. Therefore, it is necessary to manage the tomato plants in good weather. Avoid pruning and pruning on rainy days or when the dew is not dry, promote wound healing as soon as possible, and prevent the invasion of germs.

After the tomato is infected with the disease, the branches and leaves are more obvious, when it is found that there are brown spots on the branches and leaves, this is the initial stage of the infection of the pathogen, it is necessary to remove the diseased branches and leaves in time, destroy the treatment, remove the residual leaves and rotten leaves on the ground in time, and concentrate them outside the garden for burning or digging a pit to bury them. Prevent the spread of pathogens.

When the weather is continuously rainy and the air humidity is high, tomatoes are most susceptible to infection with germs, and pesticide control should be carried out. Soft rot can be sprayed with 70% Dixon 1000 times liquid, sprayed once every 8 10 days; Brown rot is sprayed with 25% Rectum 800 1000 times, sprayed once every 7 days, sprayed 2 3 times; Anthrax is sprayed with 80% anthrax Fumei wettable powder 800 times liquid or 50% carbendazim wettable powder 500 times liquid, sprayed once every 8 10 days, sprayed 2 times in a row.

Which drugs to choose, first of all, according to the types of pests and diseases that occur in crops, select pesticide varieties with excellent control effects, and also pay attention to the selection of pesticides that have no K pesticide harm to crop safety, or basically no I pesticide damage; It is less toxic to humans and animals, n or basically no O toxicity; Pesticide varieties that have no W pollution or basically no X pollution to the ecological environment. For example, for the prevention and control of aphids, whiteflies, American spotted loon flies and other pests, 8% Tiana avermectin, 1% Tiano Da acetamiprid, Tian S Da cyhalothrin, 11% Tian Puda chlorpyrifos, aphid lice Suke, insect mites, imidacloprid and other agents can be used for control; Or fumigation with dichlorvos and fumigation with aphids. The control of mites, flying lice, wood lice, scale insects and other pests can be controlled with 1% day n avermectin, 5% day h da acetamiprid, aphid lice speed, nisolan, day c da avi diesel emulsion, stone sulfur mixture and other agents.

For the control of lepidopteran pests, 23% Tianjda chlorpyramide, 40% Tianqda fenozide, Tianfda cyhalothrin, 6% Tianda avermectin, 70% Tianqda chlorpyrifos and other agents should be used for control. For the prevention and control of epidemics, downy mildew and other diseases, you can choose to use Tianqda Yufeng X, Kelu, Pulipke, Amicida, Oxazalin, alum, chlorothalonil, Dassheng, ethyl phosphorus aluminum, Ruixin mold, Keshuang cyanide and other agents for prevention and control, or use Kelu smoke pods, chlorothalonil smoke control and other drugs. For the prevention and control of gray mold, sclerotinia sclerotinia and so on, you can choose to use pesticides such as dictoxalin, sokeline, promethoxyde, amicida, Aimiao emulsifiable concentrate, Wanv milde, etc., or use Lide smoke bombs for smoke prevention and control.

The occurrence of powdery mildew, rust, leaf mold and other diseases can be prevented and controlled by Tianda Yufeng C, Fen Rust Ning, Stone Sulfur Mixture, Fuxing, Shigao, Amicida, Aimiao Emulsifiable Concentrate, Powder Biqing and other agents, or use white powder to clear smoke bombs for smoke control. For the prevention and control of bacterial diseases such as wilt, root rot, verticillium wil, cataplexy, and blight, and 4 and d anthrax, brown spot, gray spot and other diseases, drugs such as dichlormycofen, methyl tobuzin, amimidine, dixone, carbendazim and other drugs should be used for prevention and control. For the prevention and treatment of bacterial horn spots, perforation 4, edge blight, leaf blight, bacterial wilt, ulcer, medullary necrosis and other bacterial diseases, it can be treated with agents such as tianrdanoxa, chunleimycin, flupiic acid, ciprofloxacin, ofloxacin, doning, polyantimycin, sterilizim, DT fungicide, gramide, and copper luoamide.

For the prevention and control of viral diseases, Tianu Da Yufeng Q, Pyrobazim, Virus A, Bacterium Poison Qing, Phytophyl and other agents should be used for prevention and control. Basically, n is more commonly used than 2, and you can choose one p under n from 8.

1. Choose varieties or first-generation hybrids that are heat-resistant, disease-resistant, and have a short growth period. Such as Zaoque Drill, Canada No. 8, Pujiang No. 1, etc.

2. Sow seeds and cultivate strong seedlings at the appropriate time. The sowing period of winter tomato is very strict, and the sowing of winter tomato with 500 times liquid liquid of new high-fat film can drive away underground diseases and insects, isolate virus infection, do not affect the germination and swelling function, strengthen the respiration intensity, and improve the seed germination rate. The seedling site should be located in a place conducive to drainage and cool ventilation.

Set up scaffolding in advance, cover it with film in case of rain, and cover it with reed curtains around noon on sunny days. At the same time, in the tomato seedling stage, spray 800 times of the new high-lipid film in a timely manner (to prevent bacterial infection, improve the ability to resist natural disasters, improve the intensity of photosynthesis, and protect the growth of seedlings), and the seedling age is not more than 30 days.

3. Moisture management is a key measure. It is necessary to choose well-drained loam or sandy loam soil and cultivate it with high furrows. In addition to the application of basal fertilizer, top dressing 2-3 times in the fruit hypertrophy stage, and spraying of vegetable fruit Zhuang Tiling in the flowering and fruit-setting period of tomato to enhance the quality of pollen fertilization, strong circulation fruit setting rate, promote fruit development, no deformity, no empty shell, no seeds, good uniformity, quality improvement, so that the vegetable and fruit have a good yield.

4. Cultivation methods. The growth period of winter tomato is short, so in order to improve the yield per unit area, it should be planted densely. In some areas, autumn tomatoes are intercropped with tall crops, or fast-growing vegetables are interplanted under the tomato shelf and covered with the ground, which has the effect of cooling, moisturizing, and controlling the occurrence and development of viral diseases to a certain extent.

5. Cover the film to prolong the growth period. When the minimum temperature drops below 10 degrees, the arch should be covered, the ventilation time should be gradually shortened, or even tightly covered.

Pesticides: ,

Control of underground pests: phosphine, cyhalothrin.

Control of aphids: imidacloprid, chlorchloriprid.

Control of cotton bollworm, leafminer, diamondback moth, Spodoptera litura, Spodoptera exigua: emamectin, avermectin, cyhalothrin.

Control of whiteflies: isoprocarb, imidacloprid, etc.

Fungicides: prevention and control of seedling diseases: Chlormycofen, phytoling, Fumeishuang, etc.

Prevention and control of early and late blight and downy mildew: mancozeb, manganese-zinc, manganese-zinc, manganese-zinc, fluopyramid, downy mildewcarb hydrochloride, etc.

Prevention and control of bacterial diseases (bacterial wilt, canker, bacterial medullary necrosis): thiamium copper, thioxen copper, etc.

Prevention and treatment of viral diseases: copper aluminum acetate, copper marginidine acetate, etc.

Prevention and control of powdery mildew: difenstrobin, haloconazole, propiconazole, hexaconazole, etc.

Acaricide: alkyne mite.