Vegetables are a kind of crops with a wide planting area. If the management of farmers is not scientific or the growth environment of vegetables is high and humid, it is easy to cause problems such as weak vegetables and low yield, and serious diseases can cause vegetables. So what are the diseases of vegetables? How to prevent it? Xiaobian has sorted out the jingles of some common diseases of vegetables. Let's take a look.
1. West cucurbit gray mold
Most of the pathogens are stained from residual flowers, and the diseased flowers are rotted and mildewed.
Infected young melons develop rapidly, and the genus of gray mold is bad.
The source of the diseased melon is not clear enough to spread.
2, tomato early blight
At the beginning of the disease, the black round spots are enlarged, and the edges are yellow halo.
The concentric wheel pattern is the most obvious, which is harmful to the fruit stems and leaves.
The lower leaves have multiple lesions, and the high temperature and high humidity develop rapidly.
3. Tomato late blight
Invisible water spots appear on the leaf margin and tip of the disease.
The leaf spot enlarges the color and turns brown, and the diseased leaf leaves the white mold.
The stem of the petiole is brown rot, and the plant becomes wilting.
The lesions on the stem are slightly sunken, and the white mold is more obvious.
The diseased plaque is hard and the color becomes black and brown into moiré.
The moist white mold covers the lesions, and the texture is hard and not soft.
4, tomato gray mold
The disease is mostly self-contained, and the green fruit is often from the fruit.
The leaves are at the tip of the leaf, and the v-shaped spots are expanded inward.
Dense gray mold lesions, stalks infected with round spots.
The diseased ring is easy to break, and the stems are dead.
5, tomato leaf mold
High temperature and high humidity are conditions, and the disease originates from the leaves.
A shallow yellow spot appears on the back of the leaf, and the lesion is invisible or elliptical.
The front of the leaf turns yellow, and the leaf back is plaque.
The lesions enlarge the leaf vein limit and become large spots between the veins.
The lower leaves are infected first, and the diseased leaves are severely wounded.
6, tomato leaf leaf physiological disease
There are many sheds in the tomato leaf, and a large amount of nutrients are consumed.
After drying too much wet nitrogen fertilizer, the variety differences must be known.
7, pepper virus disease
Capsicum virus has many symptoms, and flowers, yellow, necrosis and deformity.
Mosaic disease leaves have special symptoms, and the shades are striated.
The leaf surface is very uneven, and the growth is slow and distinct.
Yellowing necrosis, the diseased leaves thickened and changed shape.
The leaves faded green and yellow, and the small clumps of fern leaves were linear.
The shortening of the internodes is dwarf, and the leaves are easy to fall.
8, pepper anthracnose
The lesion is initially a water stain, and the gradient is brown and nearly round.
Gray spots in the middle of the lesion, with black spots on it.
The fruit lesions are concave and the shape is not round.
The concentric wheel pattern has black spots, and the moisture is easy to stick red.
The diseased department shrinks like a membrane when dry, and the membrane is often broken.
9, pepper powdery mildew
White mold is produced in the back of the vein, and the leaf surface of the mold begins to fade.
Yellow spots appeared on the diseased leaves, and white mold on the back of the leaves continued to develop.
The leaves turn yellow and fall off easily, leaving the top tips in severe cases.
10, pepper gray leaf spot
The seedlings are all ill, which damage the stems and leaves.
Initially scattered small brown spots, indefinite or near-circular shape.
The lesion is grayish white in the middle, often falling off and perforating.
The more the lesions, the more the leaves fall, and the branches are left in severe cases.
11. Seedling stage blight
The incidence is more than the mid-mature, and the stem-based lesions are dark brown.
The lesion ellipses gradually sag, and the rotation around the stem is repeated.
During the daytime recovery during the day, the stem base is damp and perishable.
The final contraction is completely dry until the death stands upright.
12, seedling disease
The stem base of the diseased seed is hot and the color changes to brownish yellow.
The diseased part of the disease is shaped like a line, and the high-humidity cotyledons are perishable.
Initially lodging individual points, seriously lodging a large piece.
13. Seedling roots
The rust and brown color of the roots change, and the new roots do not decay quickly.
The leaves are yellowish and pale; the new leaves are not wilting.
Low temperature is not exposed to light, and excessive humidity is a precursor.
14, cucumber blight
Yellow streaks between the stem bases, and the daytime restoring during the day.
The longitudinal fissure flow of the diseased part is sticky, and the vascular tube is brown.
15, cucumber powdery mildew
White flour on the front and back leaves, enlarged into round white spots.
Warm and high-humidity is connected into pieces, much like the surface of the leaves.
In the later stage, the black spots were severely affected and the leaves were brittle.
16, cucumber downy mildew
The leaves showed water immersion spots, which were limited by leaf veins after expansion.
The lesions are light brown and the lesions are merged into pieces.
The wet leaves are backed by black mold, and the whole leaves are dry and dry.
17, cucumber angular spot disease
The spotted downy mildew is easily confused, and the fungal bacteria are known.
The shape of the lesion is multi-horned, the scale is large and the horn is small.
Downy mildew lesions are yellowish brown, and the spot blotch is gray and white.
The former leaves black mold, and the latter leaves white pus.
Downy mildew lesions are dark and dull, and polygonal lesions are translucent.
18, cucumber flower topping
The apex has been shortened and the male and female flowers are combined.
It is difficult to increase the yield of the top of the melon.
19. Cucumber gray mold
Most of the pathogens are stained with residual flowers, and the young plants of the gray mold are rotten.
The diseased flowers fall off and stain the leaves, and the leaves form large lesions.
Or round or flat without specification, the edge of the lesion is obvious.
The affected part is visible, and the stem infection is also rotten.
20, zucchini virus disease
The gourd virus has multiple leaves, curly leaves and streaks.
The internode shortening strain is dwarfed, and the diseased plant has little or no melon.
The virus is seriously looking at the heart leaves, and the heart of the leaves becomes smaller and is chicken feet.
There are many autumn gourd viruses, and the prevention of phlegm transmission should be remembered.
The above is the common disease of vegetables in the small series compiled by Huinong. The high-humidity growth environment is the main inducing condition for the occurrence of vegetable diseases. Therefore, farmers should pay attention to timely prevention when managing vegetables. The above jingles will help you. ?
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