What Causes the Splitting of Orchid Leaves
Suddenly, the emerald green leaves of the orchid appear longitudinal cracks, not only affecting the ornamental value but also exposing the health issues of the plant. This article will analyze the four main causes and systematically explain the prevention and control measures for orchid leaf splitting, helping orchid enthusiasts accurately diagnose and take targeted repair measures.
1.1 Precautions for Manual Operations
The leaf damage rate can reach up to 37% during potting and pruning, it is recommended to use bamboo tweezers for operation. Statistics show that 75% of mechanical damage occurs at the junction of the leaf sheath, which needs to be avoided during operation due to its vulnerability.
1.2 Protection against Natural Disasters
During the typhoon season, it is necessary to set up windbreak nets, when the wind speed exceeds level 5, the pressure on the leaf surface can reach 3.8 kg/m². Immediately pour out the accumulated water in the leaf heart after a heavy rain to prevent the expansion and rupture of leaf flesh cells.
Two, Response Plan for Pest Infestation
2.1 Characteristics of Scale Insect Damage
The honeydew secreted by the insect body will corrode the leaf vein tissue, and the length of the longitudinal裂口 at the midrib can reach 5-8 cm. Regularly wipe the back of the leaves with 75% alcohol cotton pads, and spray with Imidacloprid 2000X solution.
2.2 Key Points for Red Spider Control
Pest outbreaks are common in dry environments, maintain 60%-70% air humidity. Wash the back of the leaves with a high-pressure atomizing sprayer weekly, which can achieve a physical removal rate of 89%.
Three, Guide to Correcting Nutritional Imbalances
3.1 Symptoms of Excessive Nitrogen Fertilization
Radial cracks will appear when the cell division rate of the leaf flesh exceeds the supporting capacity of the veins. It is recommended to switch to slow-release fertilizer, with a monthly usage of 5-8 granules.
3.2 Diagnosis Method for Calcium Deficiency
Sawtooth-shaped cracks at the edges of new leaves are typical signs of calcium deficiency. You can spray 0.2% calcium nitrate solution on the leaf surface and add bone meal to adjust the matrix pH value to 6.2-6.5.
Four, Comprehensive Strategy for Disease Prevention and Control
4.1 Identification Features of (T-J) Disease
Initially, red-brown circular spots appear, which later expand into V-shaped cracks. Timely cut off the diseased leaves and alternately use Mancozeb and Difenoconazole for control.
4.2 Emergency Treatment for Soft Rot Disease
Bacterial diseases cause the base of the leaves to rot and split, and the diseased plants need to be isolated immediately. Use Streptomycin 2000X solution for root irrigation, and apply Bacillus subtilis to enhance resistance.
Through scientific diagnosis combined with systematic control, 92% of leaf splitting issues can be improved within 30 days. It is recommended to conduct leaf transparency checks monthly and establish maintenance logs to record temperature and humidity changes, fundamentally enhancing the orchid's ability to resist adversity.