Detailed Explanation of Common Pest and Disease Control Methods for Dendrobium officinale

Dendrobium officinale is a herbaceous plant mostly used for medicinal purposes. However, because it mostly grows in relatively shady and damp mountain environments, some diseases and pests are more likely to breed. So what are the common pests and diseases? Below, Qinnong Web introduces the onset conditions and control methods of these diseases.

1. Black spot disease

It mostly occurs on the leaves of Dendrobium officinale and is very easy to identify. The early symptoms appear as brown spots on the leaves, which then slowly turn dark brown, and the distribution range slowly spreads to other leaves, finally causing large-scale death of the leaves. The onset time is mostly concentrated in April. At this time, pay attention to inspections. Once found, it can be controlled with 1000-fold diluted Duoling solution. It is best to discard severely affected plants to avoid infecting more Dendrobium officinale.

2. Sooty mold

The onset time is likewise concentrated around April. In the early stage, it is relatively easy to overlook because at first it looks like dust on the leaves. When it gradually becomes more serious in the later stage, it is very easy to identify, as a layer of material like coal ash slowly covers the surface and is also very difficult to remove. The entire Dendrobium officinale plant will eventually grow slowly, or even stop developing. Once found, it is recommended to use 1500-fold diluted 40% dimethoate emulsifiable concentrate for control. After harvest, it is best to take away all residues to avoid leaving behind pathogens.

3. Soft rot

It mostly occurs during the rainy season. The cause is that in a hot and humid environment, moisture invades the roots. Therefore, drainage work during the rainy season must generally be done well. In the early stage of onset, the plant stops developing, and some leaves slowly wither, the root color darkens, and colored water seepage flows out. Finally, root rot causes the plant to fall over. Once found, it is best to burn the necrotic diseased plants, then immediately disinfect with agricultural streptomycin, and a small amount can be applied to the surrounding plants.

4. Dendrobium officinale scale insect (Fiorinia nephelodes)

This is a parasitic insect similar to aphids. It generally only grows on Dendrobium officinale, and the onset time is mostly concentrated in late May. When it occurs, it is easy to find, mainly appearing as deformed leaves; those that are not deformed will be found to have leaves in a withered and dry state. In such cases, it is best to first remove them manually to eliminate the source of the pest, and finally use 1000-fold diluted 40% dimethoate emulsifiable concentrate for control. Doing a good job of disinfecting against pests in the early stage can effectively prevent the incidence rate.

The above is some content about the prevention and control of common pests and diseases of Dendrobium officinale. Of course, there are some other diseases that we will present to everyone one after another later. Those who need information in this area, remember to follow our website.