Peasant friends who plant bitter gourd can look over and teach you how to understand bitter melon disease in one minute. What are the common diseases of bitter gourd? The following Hui Nongwang Xiaobian mainly introduces the symptoms and maps of ten common diseases of bitter gourd!
What are the common diseases of bitter gourd?
Fusarium wilt, blight, blight, powdery mildew, anthracnose, downy mildew, black spot, cotton rot, leaf blight, viral disease
First, blight
Typical symptoms
The incidence of melons is heavy;
In the early stage of the disease, it will fade from the bottom to the top, and then become wilted;
The vascular bundle is browned at the base of the diseased stem;
Sometimes there are light brown necrotic spots on the surface of the diseased stem, and the diseased part rots in the later stage, leaving only the vascular bundle.
Second, the blight
Typical symptoms
Mainly harmful to leaves, stems, melons;
The leaf spot is initially a water-soaked spot, followed by an irregular yellow-brown spot with a wheel pattern and a small black spot on it;
Stem plaques are irregular in shape, mostly longitudinally split, with small black spots on the upper side, easy to break, and there is a flow phenomenon when the humidity is high;
The melon strips are initially water-soaked with small dots, followed by irregularly shaped lesions with slight depressions, and small black spots on them are easy to crack and rot.
Third, the disease
Typical symptoms
Growth point and tender stem disease, initially water-soaked soft rot, after dry and withered;
The stalk infection will start from the base of the ground stem, initially water-soaked dark green, softening and shrinking, the upper leaves will sag and droop, and the whole plant will die;
The leaf spot is initially irregularly dark green water-immersed, and the edge is not obvious;
The fruit onset occurs first from the pedicle, and there is a water-soaked dark green depression, which shrinks and softens.
Fourth, powdery mildew
Typical symptoms
Mainly harmful to the leaves;
White powder spots will form on the front and back of the leaves at the beginning of the disease;
In the later stage, the powder spots are dense, causing the leaves to turn yellow and die.
Five, anthracnose
Typical symptoms
Mainly harmful to melons;
The melon strips are initially water-soaked, irregular, and later depressed. When the humidity is high, the diseased part produces a pink sticky substance with small black spots on it.
6. Downy mildew
Typical symptoms
Mainly harmful to the leaves;
Water-soaked irregular lesions appear on the leaf margin or leaf back, and the lesions are restricted by veins and are polygonal pale brown patches;
When the humidity is high, the gray-black mold layer appears at the corresponding position of the leaf back lesion;
In the later period, the leaf edge is curled up and dried.
Seven, black spot
Typical symptoms
Mainly harmful to the leaves;
Leaf lesions are irregular, with a taupe in the middle and a yellowish brown edge;
The fruit lesion is a taupe near elliptical depression;
There is a black mold layer on the late stage.
Eight, cotton rot
Typical symptoms
Mainly harmful to melons, the most serious damage to mature melons;
It is initially water-soaked, and then expanded to a rot-like shape with a dense flocculent white mold on the surface;
When the humidity is high, the whole melon strip is rotted.
Nine, leaf blight
Typical symptoms
Mainly harmful to the blade;
Initially there are obvious water-soaked spots between the leaf margins or veins of the leaf back;
When the humidity is high, the leaves lose water and dry.
X. Viral disease
Typical symptoms
Each growth period can occur;
The leaves are shrunk, become smaller, the internodes are shortened, the growth points are deformed, the plants are dwarfed, the melons are small or distorted, the irregular sag necrotic spots appear on the melon strips, the leaf color is uneven, and the young shoots are deformed.
About the identification and symptoms of common diseases of bitter gourd Hui Nongwang Xiaobian introduced this to the farmers, and friends in need can check it out!
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