What to Do If Narcissus Roots Rot
Narcissus root rot is a common issue in the maintenance process, not only affecting the growth of the plant but may also endanger its life. When the bulb becomes soft and the leaves turn yellow, it indicates immediate remedial measures are needed. This article will systematically analyze the treatment solutions for root rot in both soil-based and water-based cultivation methods, helping you save your beloved narcissus plants.
Soil-based Narcissus Root Rot Treatment Plan
1. Key Points of Root Pruning Operation
Use a sharp knife that has been disinfected to make a circumferential cut 2mm outside the rotten tissue. Retain the healthy, milky white part of the roots, and apply sulfur powder to the cut surface after treatment. Let it dry in a cool and well-ventilated place for 24 hours before repotting. Be especially careful to avoid using uncomposted organic fertilizer, which is the main cause of secondary infections.
2. Key Environmental Control Parameters
Strictly control the temperature within the range of 18-22°C, and maintain the air humidity at 60%-70%. It is recommended to use a thermometer and hygrometer for real-time monitoring. Immediately turn on the circulating fan when the temperature exceeds 25°C. The light intensity should be maintained at 10,000-15,000Lux, ensuring 4-6 hours of direct sunlight daily, which can be supplemented with grow lights during rainy or cloudy days.
3. Substrate Proportion Improvement Plan
Use a mixed substrate of珍珠岩:蛭石:腐叶土=3:3:4, with a 3cm layer of陶粒 at the bottom for drainage. Add 50g of carbendazim per cubic meter of substrate for disinfection, adjust the pH value to between 6.0-6.5, ensuring the best water permeability and breathability.
Water-based Narcissus Root Rescue Guide
1. Disinfection Process of Water-based System
Soak the container in a 0.1% potassium permanganate solution for 30 minutes, and boil the water-based支架 for disinfection. After treatment, the roots should be soaked in a 50ppm solution of indole acetic acid for 15 minutes to promote the formation of callus. The water level should be controlled to touch the base of the root disc 1cm, avoiding submerging the bulb.
2. Water Quality Management Standards
Use RO purified water or tap water that has been exposed to sunlight for more than 3 days, with an EC value of less than 0.3mS/cm. It is recommended to change the culture solution every 48 hours, keeping the water temperature at 18±1°C. When adding water-based nutrient solution, dilute the concentration to half of the standard amount to avoid root burn.
3. Disease Prevention System
Establish a three-level defense mechanism: soak in a solution of Bacillus subtilis for 10 minutes weekly, add seaweed extract every half month to enhance stress resistance, and replace the entire water-based system monthly. When Penicillium infection is detected, immediately use pyraclostrobin suspension for control.
Through systematic maintenance management, the issue of narcissus root rot can be effectively controlled. The key is to establish a maintenance concept focused on prevention, regularly check the root status, and adjust cultivation parameters in a timely manner. It is recommended to conduct root health assessments quarterly, using the four-step diagnostic method of 'observing color, smelling odor, checking records, and testing hardness' to eliminate the risk of root rot in the early stage.