How to protect orchid leaves by raising orchids

Since most varieties of Chinese orchids only bloom once a year, orchid leaves have become an important object of appreciation, and there is even a saying that "watching leaves is better than appreciating flowers". The leaves on each false bulb of bluegrass grow once, and new leaves can not be reproduced, which makes the maintenance of orchid leaves more important. The author summarizes several key points of orchid leaf maintenance from the practice of orchid cultivation for many years for your reference.

First, avoid damage caused by diseases and insect pests. Especially in the plum rain season, in the middle and lower reaches of the Yangtze River with more Rain Water and higher temperatures, we should pay close attention to preventing the occurrence and spread of waterlogging, stagnant water and diseases, such as scab, white silk disease, etc., which mainly damage leaves and cause different degrees of spots on the front or back of the leaves, which are difficult to disappear, and in serious cases, the whole leaves wither, so we should pay attention to disease prevention.

In early spring, use methyl topiramate with 800 times of water or chlorothalonil with 500 times of water, once every 10 days. At the same time, keep the orchid cultivation site and the plate well ventilated and properly dense. When orchid disease occurs, the diseased leaves and old leaves should be cut off in time, and the sharp angle formed after cutting should be less than 30 degrees. The damaged leaves can be retained, as long as the pests are removed. Cut orchid leaves should not be thrown in the orchid planting site, should be burned or buried deep.

Second, preserve the leaf tip and prevent the occurrence of the focal tip phenomenon. The tip of the orchid leaf should be preserved as much as possible and should not be cut off easily. Once the tip of the leaf is lost, the orchid leaf becomes a sharp sword and appears rigid. The key to preserving the tip of the blade lies in the daily careful maintenance and management. Excessive wet pot, old seedlings easy to coke tip; too dry new seedlings to withered tip; overheating in the basin, poor ventilation, excessive fertilization, rotten root pruning during replanting, unclean plant materials, etc., will cause orchid coke tip. As far as the external environment is concerned, the air humidity is too high or too low, poor ventilation, muggy and so on will also cause coke tip.

In addition, there are bacterial focal point shrinking head, when disease spots appear in the leaves, if the scissors are not sterilized thoroughly, bacteria will be brought into the wound when cut off. The time to remove the coke tip should be in the sunny and dry noon, when the wound heals quickly, do not water after cutting or trim on cloudy and rainy days.

The source of the disease of the coke tip is in the root, so the radical cure of the coke tip must turn the basin, clean up the root disease source, and sprinkle carbendazim powder directly on the wound. For the Jiaojian of the orchid leaf, the "treatment" is negative, and the leaf has been disabled after being cured. Therefore, "prevention" is positive, and it is necessary to improve management and careful cultivation.

Third, maintain the normal growth posture of the orchid leaves, and return the orchid leaves to clean. In the transportation and daily maintenance and management of orchids, orchid leaves are easily destroyed by external forces, such as breaking, twisting, entanglement and so on, so we should be careful in the process of operation. When spraying water, it is necessary to prevent the orchid leaves from folding due to excessive water pressure; to avoid colliding with the leaves when sweeping the floor; to find that the twisted leaves should be straightened out in time to restore their normal growth state; and to avoid contamination of the leaves by soil, dust, insect urine and bird dung, because once contaminated, it is easy to cause leaf diseases for a long time, so once pollution occurs, it should be washed immediately.

Fourth, the shading net treatment should be in place. The bracket of the shade net is generally no less than 2.5 meters, so as to ensure ventilation and ventilation. At the same time, the shading index of the shade net must reach more than 70%. The long-term use of low-density shade net will appear the withering and yellow phenomenon of some or all of the blue leaves, and it is difficult to restore its green. But the orchid shed should avoid dark and hot, to cover both bright and cool, it is better to feel cool under the orchid shed.