What should I do if the Anthurium leaves rot?
As a star variety of indoor ornamental plants, Anthurium is very popular for its unique Buddha spaths. However, the problem of yellowing and rotten leaves during the maintenance process often makes flower friends at a loss. This article systematically analyzes treatment plans and preventive skills based on the four major causes of anthurium rot. 1. Emergency treatment of acid-base imbalance in the medium 1.1 Analysis of the root causes of rotten leaves The water quality in the northern region is relatively alkaline. Long-term irrigation will lead to an increase in the pH value of the medium (>7.5) and hinder the absorption of trace elements such as iron and magnesium. The data shows that when the salinization degree of the medium is>0.3%, the new leaves of Anthurium will first appear yellowed spots and gradually expand to brown rot. 1.2 Scientific improvement plan ① Use pH test paper to test the pH value of the medium every week;② Prepare 0.1% oxalic acid solution (10g: 10L of water) to irrigate roots every month;③ Add 30% pine needle soil +20% decomposed bark when changing the medium to maintain the pH value in the optimal range of 5.5-6.5. 2. Key indicators of water management 2.1 Declassification of causes of rotten roots More than 68% of rotten leaf cases are caused by improper watering. The fleshy root system of Anthurium andraeanum needs to maintain a "alternating dry and wet" cycle. Continued humid environment will suffocate the root system and begin to rot within 24 hours. 2.2 Precise water control techniques ① Water once every 5-7 days in spring and autumn, once every 3 days in summer, and once every 10-15 days in winter;② Adopt the "bamboo stick detection method": Insert the bamboo stick into 2/3 of the medium and pull it out. No traces of moisture before watering;③ When water is serious, immediately replace a new medium containing 40% perlite. 3. Dynamic adjustment of light intensity 3.1 The imbalance of the light environment shows that the average daily light is less than 2000lux for 15 days. The leaves will become thinner and soft, and the chlorophyll content will drop by more than 40%. However, when direct light is>30000lux, scorching brown spots will appear on the leaves. 3.2 Intelligent light filling solution ① Use an illuminance meter to monitor and maintain 10,000 - 20,000 lux scattered light;② Use LED plant lights to fill light in winter, which is replenished for 4 hours a day;③ Turn the flowerpot 45 degrees every 10 days to ensure uniform light reception. 4. Comprehensive pest and disease prevention and control system 4.1 High-risk pest and disease map snails (nightly activities gnawing on leaf meat), red spiders (webs on the back of the leaves), and (T-J) diseases (concentric ring patterns on the leaves) are the three main threats. Humidity>85%, the incidence increases by three times. 4.2 Green control plan ① Physical control: Set up beer traps to catch snails;② Biopharmaceutical: spray 1.8% abamectin 1500 times to control red spiders;③ Environmental control: maintain air circulation and regularly prune excessively dense leaves.
Through the four-dimensional maintenance method of medium improvement, precise water supply, light environment control, disease and insect prevention, and combined with leaf wiping once a month (diluted beer 1:20), the Anthurium leaves can be restored to their oily luster. It is recommended to establish a maintenance log to record data such as temperature, humidity, fertilization and watering to achieve scientific management.