Causes and preventive measures of yellow leaves and scorched tips of orchids

Orchids are prone to yellow leaves or scorched tips during their growth and development, which reduces their ornamental value.

The reason for orchid yellow leaves and scorched tips

Too much or too little watering: Orchids like humid climate, especially like higher air humidity. If long-term watering is insufficient and the air is too dry, the roots will shrink and the absorption function will be weakened, resulting in insufficient supply of water and nutrients, resulting in yellow or sharp leaves. On the contrary, too much watering, pot soil long-term too wet also easy to cause root rot, yellow leaves, and even death.

2, too strong or insufficient light: culture orchids, such as improper placement, too strong or insufficient light, will also cause yellow leaves, coke tips or leaf edges withered coke.

3, fertilization is too thick: orchids should be light fertilizer, not thick fertilizer or raw fertilizer. Such as a fertilizer too thick, especially excessive application of chemical fertilizer, often cause root injury, and then cause yellow leaves or coke tip.

4. Disease and pest damage: The orchid plant suffers from disease and pest attack, which will also cause leaf injury and root injury of the orchid plant, and finally yellow leaves and scorched tips will appear.

In addition, the pH of the culture soil is not suitable (soil alkaline), long-term no fertilization or no change of pot soil and environmental pollution, etc., are easy to cause yellow, yellow or leaf edge leaf tip scorched.

Preventive measures for yellow leaves and scorched tips of orchids

1. Watering should be scientific: it is necessary to decide whether to water and how much water to irrigate according to the season, growth and development stage and the dry and wet conditions of the pot soil. Special attention should be paid to increasing the air humidity to avoid excessive dryness or long-term excessive humidity of the pot soil.

2. Fertilization should be reasonable: thin fertilizer should be applied skillfully, and thick fertilizer and undecomposed liquid fertilizer should not be applied. The next morning after fertilization, water should be poured once to dilute the fertilizer and avoid the occurrence of fertilizer damage.

3, light should be appropriate: orchids like half shade, in addition to early spring and winter appropriate to see more sunlight, people should take timely shade measures after summer, avoid direct light, it is best to put under the shade shed or building shade maintenance.

4, timely prevention and control of pests and diseases: to prevent diseases and eliminate pests as soon as possible, especially to pay attention to the prevention and control of anthrax, black rot, scale insects, etc.

5, the soil should be appropriate: choose slightly acidic loose, fertile culture soil, and pay attention to timely change pots, change soil, regularly apply ferrous sulfate solution, keep the pot soil slightly acidic.