Root rot is a common but serious issue affecting jasmine plants, often caused by fungal pathogens like Phytophthora, Pythium, or Fusarium. From the plant's perspective, root rot disrupts nutrient and water absorption, leading to systemic stress and potential death if untreated. Understanding the symptoms and treatment is crucial for maintaining healthy jasmine plants.
Jasmine plants exhibit several telltale signs when suffering from root rot:
2.1. Above-Ground Symptoms: Leaves turn yellow or brown, wilt despite adequate watering, and drop prematurely. Growth becomes stunted, and new shoots may fail to emerge.
2.2. Below-Ground Symptoms: Roots appear dark brown or black, mushy, and emit a foul odor. Healthy white roots are replaced by decaying tissue, reducing the plant's ability to absorb nutrients.
2.3. Secondary Indicators: Fungal growth may appear on the soil surface, and the plant becomes more susceptible to pests due to weakened immunity.
Root rot develops under specific conditions that favor fungal growth:
3.1. Overwatering: Soggy soil deprives roots of oxygen, creating an anaerobic environment where pathogens thrive.
3.2. Poor Drainage: Heavy or compacted soil retains excess moisture, exacerbating root suffocation.
3.3. Contaminated Soil or Tools: Fungi can spread through infected soil, pots, or pruning tools.
Early intervention is critical to save the plant. Follow these steps:
4.1. Remove Affected Parts: Gently unpot the plant and trim away all rotted roots with sterilized shears. Healthy roots are firm and white.
4.2. Repot in Fresh Soil: Use a well-draining potting mix and a clean container with drainage holes. Avoid reusing infected soil.
4.3. Apply Fungicides: Natural options like neem oil or commercial fungicides can help eliminate residual pathogens.
4.4. Adjust Watering Practices: Water only when the top inch of soil is dry, and ensure excess water drains freely.
To avoid recurrence, adopt these practices:
5.1. Optimize Soil Conditions: Use a mix of perlite, sand, and organic matter to improve drainage.
5.2. Monitor Watering: Jasmine prefers slightly moist soil but tolerates short dry spells. Avoid waterlogging.
5.3. Sanitize Tools: Disinfect pots and tools before use to prevent cross-contamination.
5.4. Promote Air Circulation: Ensure the plant has adequate space and airflow to reduce humidity around the roots.
