Classification of focal head shrinking of orchids

Classification of focal head shrinking of orchids

In orchid planting, the scorched head of orchid often shrinks, and there are four kinds of phenomena here.

1, the basin is too dry or the air humidity is too low, and the basin surface is too dry. In general, the orchid leaves can not be shown immediately. The first reflection is that the orchid leaves are dehydrated. After the watering resumes, it is easy to walk the grass from the old seedlings, and the orchid leaves start from the top to the lower yellow leaves. If the water in the basin is injured, the orchid leaves turn yellow, the leaves are yellow from the bottom up, and the walking time is slow.

2, Langen fungus damage or Langen crystal head affected by water stain should be the same, water stain is a process, crystal head rot is the result, leaf tip coke head is a surface phenomenon. Such a coke tip, as Fei Xiang said, the leaf tip is black, and after treatment in the basin, the coke head is no longer extended.

3, the focal tip is caused by fertilizer damage, and the focal tip is brown or black, which is very obvious with the normal tissue of orchid leaves, and the normal tissue of orchid leaves is also prone to fat damage spots, such irregular round spots, the center of the spot is brown, the place that comes into contact with normal tissue is a circle of black spots with uneven thickness, and the boundary is also very obvious.

4, the bacterial damage caused by the orchid plant, many of which are shown from the coke tip phenomenon, such as the blight tip, the focal point is white-brown, the junction with the normal blue leaf tissue is black-brown, the white-brown is the dead dry withered area, and the black-brown is the bacterial damage outbreak area. Leaf blight, the leaf tip light brown is the dead dry dry area, the dark brown is the bacterial damage outbreak area, and most of the areas in contact with the normal orchid leaf tissue are yellowish green, this yellowish green area is the infection area of the normal tissue of the blue leaf, which is different from the blight tip disease. Anthracnose is also easy to show the focal tip, the leaf tip shows a dark brown, a light brown, alternately to the lower part of the blue leaf, and independent or connected dark-brown patches appear in the leaves, and the periphery of the plaque is yellowish.