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== Tomato Septoria Leaf Spot == |
Tomato Septoria Leaf Spot is a common tomato leaf disease caused by the fungus Septoria lycopersici. It primarily affects the leaves, causing noticeable spots that hinder photosynthesis and reduce yields. |
== Pathogen == |
- The disease is caused by the fungus Septoria lycopersici, which belongs to the Ascomycota division. |
- The fungus produces small black conidia, highly active in humid environments, spread by wind, rain, or irrigation water. |
- Conidia penetrate the plant through stomata and expand, forming spots on leaves. |
== Symptoms == |
- Early symptoms: Small water-soaked spots appear on the back of leaves. |
- As disease progresses, spots enlarge into distinct round or irregular shapes. |
- Typical spots are grayish-white with a dark brown border; centers may be pale gray or white. |
- Small black dots (conidia) appear in spot centers. |
- Spot sizes usually range 2-5 mm but may merge into larger spots in favorable conditions. |
- Leaves yellow as spots expand; severe infections cause premature leaf drop. |
- Stems can also be infected, showing small brown spots, affecting overall plant health in severe cases. |
== Transmission == |
- Spread primarily via conidia dispersed by wind, rain, water droplets, agricultural tools, or human activity. |
- Can be seed-transmitted; controlling during planting is crucial. |
- Pathogen thrives in humid environments. |
- Optimal temperature for spread is 15-30°C, with rapid spread under warm, moist conditions. |
== Disease Conditions == |
- Optimal temperature: 20-25°C; high (>30°C) or low (<10°C) temperatures inhibit spread. |
- Relative humidity above 85% accelerates pathogen spread and conidia germination. |
- Prolonged leaf surface moisture or dew aids pathogen entry through stomata. |
== Infection Cycle == |
- Mycelium and conidia overwinter in diseased plant debris. |
- In spring, spread to new crops occurs via wind and rain. |
- Latent period: 5-7 days. |
- In wet weather, spots spread rapidly and generate new conidia within 10-14 days post-infection. |
== Control Methods Agricultural Control == |
- Crop rotation: Avoid continuous tomato or Solanaceae planting for 2-3 years to reduce soil pathogen load. |
- Field management: Ensure proper spacing for ventilation and light; remove and bury diseased debris promptly. |
- Seed treatment: Use healthy or disinfected seeds to limit pathogen spread. |
- Balanced fertilization: Apply nitrogen, phosphorus, and potassium properly; avoid excessive nitrogen to reduce susceptibility. |
== Control Methods Chemical Control == |
- Fungicide spraying: Apply chlorothalonil, copper-based fungicides, or mancozeb early; spray every 7-10 days, 2-3 times. |
- Fungicide rotation: Alternate fungicide types to prevent resistance. |
== Control Methods Ecological Control == |
- Greenhouse management: Maintain proper temperature and humidity; avoid excess moisture and overwatering; ensure timely ventilation. |
== Prevention Recommendations == |
- Seed disinfection. |
- Use disease-resistant varieties. |
- Maintain good field hygiene and promptly remove plant debris, especially after harvest. |
- Proper fertilization and field management to enhance plant resistance. |
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Check out the documentation for more information.
Tomato Disease Knowledge Base
This directory contains the external knowledge corpus used for the TRAG-DPO retrieval module. The dataset consists of 10 text files (0.txt to 9.txt), where each file corresponds to a specific tomato disease category or healthy leaf.
📂 File Mapping
The file IDs correspond to the disease categories ordered from left to right in the dataset visualization:
| Filename | Disease Category |
|---|---|
| 0_new.txt | Septoria Leaf Spot |
| 1_new.txt | Tomato Mosaic Virus |
| 2_new.txt | Bacterial Spot |
| 3_new.txt | Yellow Leaf Curl Virus |
| 4_new.txt | Target Spot |
| 5_new.txt | Health Leaf (Healthy) |
| 6_new.txt | Early Blight |
| 7_new.txt | Leaf Mold |
| 8_new.txt | Spider Mites (Two-spotted spider mite) |
| 9_new.txt | Late Blight |
📝 Content Format
Each text file contains comprehensive agricultural knowledge structured to facilitate Sentence-BERT retrieval. The content typically includes:
- Disease Overview & Pathogen Information
- Visual Symptoms (Leaves, Stems, Fruit)
- Favorable Environmental Conditions
- Prevention and Control Strategies (Chemical & Biological)
🔓 Open-Source Policy
To balance research transparency and publication requirements, we adopt the following open-source strategy for the knowledge base:
Currently Open-Sourced:
0_new.txt(Septoria Leaf Spot) is partially released in this repository and does not contain the complete knowledge content. It is provided solely as a representative example of the knowledge structure and format.
Planned Release:
- The remaining knowledge files (
1_new.txtto9_new.txt) will be fully released after the acceptance and publication of the corresponding research paper.
- The remaining knowledge files (
⚙️ Usage
In the code, the model maps the predicted classification or retrieval index directly to these filenames to fetch the corresponding textual context for RAG (Retrieval-Augmented Generation).
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