Strict Virus on Tomatoes
Strict virus is one of the less-studied but potentially dangerous viruses, especially for tomatoes. This pathogen can cause a significant reduction in yield and deterioration in fruit quality. In this article, we will discuss the main symptoms of the disease, diagnostic methods, and ways to combat the Strict virus in tomatoes.
Symptoms of Infection
The manifestation of the Strict virus in tomatoes depends on the plant variety, environmental conditions, and the stage of infection. The main symptoms include:
- Mosaic leaf coloration (alternating light green and dark green areas).
- Leaf curling and deformation.
- Slowed growth and development of plants.
- Appearance of yellow or necrotic spots.
- Fruit damage: deformation, uneven coloration, reduced weight, and poor taste quality.
Modes of Transmission
The Strict virus spreads through several pathways:
- Insect vectors – the virus is transmitted by sucking pests such as aphids, whiteflies, and thrips.
- Seed transmission – infected seeds can become a source of infection in new plantings.
- Contact transmission – the virus can be spread through contaminated tools, workers’ hands, and plant residues.
- Hydroponic systems – circulation of infected water can contribute to virus spread in greenhouses.
Treatment and Prevention Methods
To prevent the Strict virus and stop its spread, the following measures should be taken:
- Application of the microbiological virucide Laviron at a rate of 10 ml per 10 liters of water for prevention and 15-20 ml per 10 liters of water for treatment every 7-10 days.
- Cultivation of resistant varieties – breeding efforts focus on creating tomato hybrids with increased virus resistance.
- Control of insect vectors – use of biological insecticides such as Prestige Plus (at a rate of 200 ml per 10 liters of water), pheromone traps, and agronomic methods to reduce pest populations.
- Observance of quarantine measures – checking planting material, disinfecting tools, and removing infected plants.
- Crop rotation and removal of plant residues – alternating crops and clearing plant residues reduce the risk of virus persistence in the soil.
- Biological protection – application of Sporagin (based on Bacillus subtilis) and Plantastim (based on Trichoderma lignorum) to stimulate plant immunity.
- Seed treatment – treating seeds with thermal methods or biopreparations reduces the likelihood of infection.
Conclusion
The Strict virus in tomatoes is a serious problem that requires a comprehensive approach to diagnosis and plant protection. Timely disease detection, preventive measures, and effective treatment will help minimize yield losses and maintain plant health.
