How to remedy yellowing bamboo leaves
Yellow leaves of green bamboo are a common problem during the maintenance process. As a perennial gramineae, the health status of bamboo directly affects the landscape value. This article will systematically analyze the causes of yellow leaves from three dimensions: environment, nutrition, and pests and diseases, and provide targeted solutions to help you quickly restore the green nature of bamboo leaves. Environmental control and maintenance management Balance of light intensity bamboo belongs to a semi-shade plant, with the best scattered light for 4-6 hours per day. In summer, sunshade nets are needed to block 40% of direct light from 10:00 to 15:00, and full sunshine can be accepted in winter. New yellow leaves should retain the base 5cm stem to stimulate the germination of dormant buds. Scientific water control adopts the "dipping basin detection method": take soil at a depth of 10cm and hold it into a ball, and water it when it is loosened and dispersed. Water amount per square meter of ground planted bamboo = bamboo age ×0.5L (such as 3-year-old bamboo 1.5L/m²). In the rainy season, a 15-cm deep drainage ditch should be excavated to keep the soil porosity>30%. Optimize the nutrition supply system. How to remedy yellowing of bamboo leaves
Nitrogen, phosphorus and potassium compound fertilizer (15-15-15) of 50g/m² is applied in spring, and organic fertilizer of 3kg/m² is supplemented in autumn. During the yellow leaf period, a mixture of 0.2% ferrous sulfate +0.1% magnesium chelate can be sprayed on the leaves twice a week for 3 weeks, paying attention to avoid high temperature periods. Establish a biological control system for three-dimensional pest control: hang 2 yellow sticky insect boards every 10 square meters to release ladybugs (1 bird/m2) to control aphids. It is recommended to use 20% imidacloprid 2000 times solution and 5% avermectin 3000 times solution alternately for chemical control, focusing on spraying on the back of leaves, twice in a row at an interval of 7 days.
Maintain the environmental humidity at 60-75% through a temperature and humidity monitor, and regularly rotate the direction of the potted plant to ensure uniform light reception. Remember the principle of "observing the leaves and knowing the roots", and if the leaves continue to yellow, you must check whether the root system is rotten. After implementing these measures, significant improvements are usually seen over 2-3 growth cycles.