Effective prevention and control of tomato virus disease:
1. Optimize the varieties with high resistance
According to the research, the resistance of domestic varieties to tomato virus disease is poor at present, while the resistance of foreign varieties to virus pathogen is strong, especially the resistance to tomato yellow leaf curl virus is more obvious, so we must strictly control the selection of planting varieties.
Select the tomato varieties with strong resistance, such as Syngenta in Switzerland, Ruikswan in the Netherlands, Hazella in Israel, Dongqin Seed Industry in Hebei, etc.
In addition, it is also an important way to reduce the occurrence of virus diseases by selecting plots without cruciferous, cucurbitaceae and solanaceae crops and cultivating strong seedlings without pests and diseases. The plots with serious diseases can also be planted in rotation with crops such as green pepper and zucchini.
2. Strengthen pest control
Because Bemisia tabaci and Bemisia tabaci are the main vectors of tomato virus, it is necessary to strengthen the early prevention and control of Bemisia tabaci, and carry out timely and effective control.
3. Scientific management of water and fertilizer
In fertilization, we should not only apply foot fertilizer, topdressing in time according to the needs of different growth stages, but also increase the application of organic fertilizer and microbial bacterial fertilizer, and control the use of nitrogen fertilizer, phosphorus and potassium fertilizer, and topdressing of trace elements in planting;
In watering, we should not only keep the soil moist, but also avoid flooding. It's best to water it with thin water and a few times, which can cultivate strong seedlings and trees and improve the disease resistance of tomato plants.
4. Scientific drug control
At present, there is no specific drug that can completely cure tomato virus disease in the market, which is also an important reason why it is difficult to control, easy to spread and lose a lot after the virus disease occurs.
It is suggested that the compound drugs of virus inhibitor (such as virus A5, Fenyou 8, etc.) and gene activator should be sprayed in time at the early stage of the disease, so as to protect the health of tomato plants and reduce the disease range.
chemical control: use 1 times solution of 83-resistant enhancer, spray once at seedling stage and once after delayed seedling.
at the initial stage of the disease, 6-8 times of 1.5% Zhi Bing Ling wettable powder, 5-8 times of 2% Virus A wettable powder, 8-1 times of 6% Virus Wang wettable powder, or 1 times of potassium permanganate should be sprayed in time for prevention and treatment.
Extended information:
Bio-pesticide of Chinese herbal medicine preparation has the characteristics of combining medical care with nutrition, early prevention and heavy treatment, and unified prevention and control, and has the following advantages:
1. High safety
Bio-pesticide of Chinese herbal medicine preparation has the characteristics of high safety, and destructive tests conducted by many users have confirmed that it is safe for most crops at any time at a concentration of more than 5 times.
Early prevention refers to using drugs at flowering stage, young fruit stage and leaf spreading stage, killing fungicides as early as possible in the sensitive period of crop growth, reducing the pathogen base and laying a good foundation for disease prevention and control for one year;
Re-treatment means that we can increase the dosage (increase the concentration, increase the frequency of drug use and shorten the time of drug use) to maximize the treatment effect before the high-incidence conditions of diseases come and the symptoms first appear.
2. Good conductivity
The botanical components of Chinese herbal medicine preparation biopesticide come from plants, and a few mineral elements are also necessary nutrients for plants, which are compatible with crops and can be quickly absorbed and conducted by crops.
The bark, leaves, roots and peels of its crops can absorb Chinese herbal medicine preparations, which can be sprayed, irrigated and smeared, which is beneficial to the prevention and treatment of diseases in many ways. After the crops are absorbed, they directly participate in the nutrient circulation of crops without changing through the conduction system of crops and play the roles of sterilization, immunity and nutrition.
For the pathogens hidden in the phloem or vascular bundles of fruit trees, general chemicals can't touch them, but the biological pesticides prepared by Chinese herbal medicine can be transmitted up and down in plants after being absorbed by crops, thus completely killing the pathogens hidden in the phloem or vascular bundles.
the core of "prevention, control and treatment" is that after the plant is infected, as long as the damage is not fatal, the pathogen can be killed in the phloem or vascular bundle by using the conductivity of the crop during the growth period of the dormant crop. ?
3. What are the advantages of nutritional rejuvenation?
Chinese herbal medicine bio-pesticide contains many nutrients and high-energy substances needed by plants, mainly polysaccharides, fatty acids, flavonoids, cellulose, lignin, polysulfides, medium and trace elements, etc. These nutrients can be directly absorbed by crops to provide nutrition for crop growth.
It can also improve the immunity of crops by improving the enzyme activity in plants, and improve the self-nutrition ability of plants (increasing chlorophyll content and improving photosynthesis ability), so that the leaves of plants grow well, and then the plants are robust, thus achieving the effect of nutrition rejuvenation.
4. Broad-spectrum sterilization
Different from traditional pesticides, Chinese herbal medicine preparation biopesticide has the functions of internal absorption, contact and protection, and its product components and modes of action are diverse.
It has obvious advantages for diseases crossing physiological and pathological diseases, has bactericidal effect on eubacteria, and also has passivation and inhibition effect on viruses, which can play a role in preventing and controlling various diseases.
5. No drug resistance
The diversity of biological pesticide action mechanism, the characteristics of multi-target sterilization and the affinity with crops of Chinese herbal medicine preparations determine that their drug resistance is almost zero, and they can be used for a long time, thus avoiding the problems of strong drug resistance and reduced control effect after continuous use.
6. Safe for agricultural products and environment
The effective components of Chinese herbal medicine preparation biopesticide are plant components, which are compatible with crops and meet the green and organic production standards; It comes from nature and is friendly to the environment. Its effective components include polysulfide compounds and carbon, hydrogen and oxygen elements, which are metabolized into simple natural compounds, carbon dioxide and water in the environment, which is beyond the reach of traditional chemicals. ?
7. Establish a virtuous circle between disease prevention and crop growth
The use of Chinese herbal medicine biological pesticides is not easy to make the bacteria resistant to drugs while preventing and treating diseases. It can be used continuously for a long time, and the effect is cumulative, which does not harm or inhibit crops, but can supplement nutrients and rejuvenate crops.
it can also improve fruit, fruit phase and taste. Long-term use of biological pesticides prepared from Chinese herbal medicines has resulted in fewer diseases, better growth, lower investment and higher income, which is the guarantee for establishing a virtuous circle of pest control and crop growth.
Baidu encyclopedia-tomato virus disease
Baidu encyclopedia-tomato TY virus disease.