2024 Author: Gavin MacAdam | [email protected]. Last modified: 2023-12-16 13:38
Luxurious orchids invariably delight us, but they only require a lot of care. In addition, these wonderful flowers can be affected by a huge number of diseases. In order to be able to choose the right method of treatment, it is extremely important to know how the symptoms of a particular disease manifest themselves on orchids. By the way, the bulk of ailments manifests itself exclusively on orchid leaves
Black rot
In most cases, this attack affects luxurious orchids if the temperature is too low. It's no secret that these magnificent plants are very thermophilic, and if they stay in the cold for a long time, they can easily get sick with the ill-fated black rot. Often this ailment also manifests itself on strongly weakened plants (they can weaken not only as a result of being affected by various diseases, but also as a result of attacks of all kinds of pests).
Fusarium rot
The leaves of beautiful orchids begin to gradually turn yellow and become covered with specks characteristic of Fusarium. This infection does not spare even young shoots. The easiest way to identify fusarium is by leaf blades - they curl, noticeably soften and are often covered with mushroom spores in the form of a pinkish bloom. The most common reason for the development of this misfortune is high humidity and lack of proper air circulation in the room.
Anthracnose
Manifestations of anthracnose can most often be seen on the leaves, and sometimes on the pseudobulbs of orchids. Round small brownish specks appear on these plant organs, clearly visible to the eye and often growing and connecting with each other. Particularly large areas turn black over time and form characteristic dents. And if the disease is completely neglected, then a pinkish or yellowish bloom often appears on the spots. In most cases, anthracnose attacks orchids due to excessive air humidity or due to stagnation of water in the leaf sinuses or in the cores of pseudobulbs.
Brown rot
On the shoots and on young leaves of orchids, watery light brownish spots appear, which gradually begin to darken, grow and merge. Almost always young leaves suffer from this misfortune. Low air temperature and abundant watering act as "accelerators" of the lesion process.
Root rot
Orchid leaves attacked by root rot begin to turn brown, and the roots of beautiful plants quickly rot and become very soft. To a large extent, the development of the disease is facilitated by high air humidity and too high temperature. The main victims of root rot are the papiopedilum, miltonia and cymbidium orchids.
Leaf spot
This is a very dangerous infectious disease that develops in the spring and summer with too bright lighting, excessive fertilization and improper watering. Wet, dark spots appear on the weakened leaves of orchids. Phalaenopsis is especially hard hit.
Gray rot
If dark islets appeared on the orchids, abundantly covered with a fluffy grayish bloom, then this is gray rot. At first, the manifestations of the disease can be seen on the leaves, and some time later it attacks both the soil and flowers, on which characteristic brownish specks appear. Gray rot occurs mainly due to illiterate orchid care, and a particular danger is the combination of high air humidity with low temperatures. However, excessive application of nitrogen-containing fertilizers does not bode well either.
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