What are the control methods of grape powdery mildew, white rot, anthracnose and other common diseases? What kind of medicine should I take?

Grape plays an important role in fruit production in the world, and grape diseases and insect pests have great influence on grape growth, yield and quality. That grape powdery mildew, white rot, anthracnose and other common disease control methods have what? What kind of medicine is good?

Grape powdery mildew, white rot, anthracnose and other common disease control methods what? What kind of medicine is good?

1. Grape downy mildew:

The leaves were infected with the disease, and irregular yellowish translucent oil-soaked small spots appeared on the front, gradually expanding into yellow-green, the edge boundary was not obvious, and several small spots were connected into an irregular or polygonal large disease spot, and yellow-white frost mold layer was produced on the back of the leaf, namely sporangium and sporangium. The disease spot later became pale brown, dry and scorched, and the leaves fell off when it was serious.

Control methods:

Grape downy mildew: spray Kejia once every 10 days or so before onset for protection. immediately aft that disease occurs, a therapeutic agent of 96% dimethomorph original pow 1500 times + Lvdasheng 600 times or Kejia 1000 times +96% dimethomorph original pow 2000 times can be sprayed alternately for 2-3 times to control the damage, and then a protective agent of 80% Lvdasheng 600-800 times can be used for alternately controlling the damage, and other diseases occurring at the same time can be simultaneously treated.

2. Grape powdery mildew:

The pathogen mainly infects the green parts of grapes such as leaves, shoots and ears. Old ripe organs do not get sick. Leaves begin to produce gray-white powder on the surface, i.e. mycelium and conidia of the fungus. When the disease is serious, the whole leaf is covered with white powder, which makes many curly withered and shed. Sometimes small black dots are produced, which are cleistocysts of spores. The surface of the leaves under the powder spots was brown, and the whole leaves were withered when it was serious. After the fruit is damaged, white powder is covered on the fruit surface first, brown star-shaped patterns appear after the powder is removed from the diseased spots, and epidermal cells die. The fruit stops growing, sometimes becomes deformed, tastes sour, and when the fruit grows up, it is infected with disease in rainy days, and the diseased place decays after cracking. The surface of fruit stalk and new shoot was gray powder spot in the early stage, and snowflake or irregular brown spot formed under the powder spot in the late stage, which made the spike axis and fruit stalk brittle, and the branches could not mature well, affecting the fruit quality and yield.

Control methods:

Grape powdery mildew: remove pathogens, pay attention to collecting diseased branches, diseased leaves and diseased fruits during winter and summer pruning, and bury them deeply. Strengthen fertilizer and water management during growth period, pay attention to drainage and waterlogging prevention in rainy season, spray potassium dihydrogen phosphate and apply compound fertilizer to roots, strengthen tree vigor and improve disease resistance, and timely pick the core, tie vines, remove auxiliary shoots, improve ventilation and light transmission conditions, and reduce disease occurrence. Chemical control: Spraying 3~50 sulfur mixture before grape bud expands but not germinates, completely eliminating overwintering pathogen. After grape sprouting and sprouting, 800 times of Lvdasheng can be sprayed to prevent various diseases. At the early stage of disease, 600 times of Lvdasheng +1000 times of Benzene or 800 times of Lvdasheng +800 times of Baijin or Wansheng No.1 can be controlled by spraying once every 10 days or so, 3 times in succession.

3, grape white rot:

The pathogen is called grape white rot pelagic fungus, which belongs to semi-known fungi. Grape white rot mainly damaged ears and branches, near the ground ear disease first, the affected ears first on the fruit stem or ear axis to form light brown water-soaked spots, gradually expanded, appeared dry. The fruit initially appears light brown and water-soaked, then quickly spreads to the whole fruit, and the fruit stalk dries and shrinks. A week after the disease, the fruit became dark brown, white dots were densely grown under the pericarp, the diseased fruit was dark brown and stiff due to dehydration and shrinkage, and the whole panicle of the disease was seriously rotted. The diseased fruit is easy to fall off after vibration, and the dried and stiff fruit clusters often hang on the branches.

Control methods:

Grape white rot: Green Dasheng (25g)+ Xinsheng (5g)/Yingde (10ml)+ Shize (10g)/(Xianlang 5ml).

4. Grape gray mold:

Symptoms are inflorescences and young fruits infected with the disease, first producing light brown, water-soaked spots on flower pedicels and small fruit pedicels or cobs, then turning brown and soft rot, when the air is humid, gray mold can be produced on the spots, namely conidia and conidia of pathogenic bacteria. When the air is dry, the infected inflorescences and young fruits gradually lose water and atrophy, and then dry and fall off, causing a large number of flowers and fruits to fall. When it is serious, the whole panicle can fall light. The new shoots and young leaves are infected with the disease, producing light brown or reddish brown, irregular disease spots, which mostly occur near the veins, sometimes appear less obvious ring patterns on the leaves, and gray mold layers can also appear on the disease spots when the air is humid in the later stage. Insubstantial shoots develop late in the growing season, with bleached skin and black sclerotia or gray mycelial masses forming spores. After sizing, the fruit was infected, brown depression spots appeared on the fruit surface, and after expansion, the whole fruit rotted, and gray spores were produced at the crack of pericarp, then spread to the whole fruit, and finally gray mold layer grew. Sometimes black sclerotia or gray hyphal masses can be produced in the diseased part.

Control methods:

Grape gray mold: green big grow 600 times + deserve 1500 times + pyrimethanil 1000 times.

5, grape anthracnose:

At the beginning of the disease, the fruit appeared needle-sized brown spots, gradually expanded into round spots, slightly depressed, black spots arranged on the surface, and pink sticky substances spilled when wet. Disease spots can extend to most or all of the fruit, fruit soft rot, easy to fall off, dry after shrinking into a stiff fruit. When the ear and cob axis, petiole disease, dark brown spots, concave, oblong, can lead to its lower ear dry off.

Control methods:

Grape anthracnose: When conidia appear in the middle and late June to the first ten days of July, spray 800~1000 times of Aokai WP +10% Benzene 1000 times, or 500~800 times of Lvdasheng +1000 times of Shike once every 10 days, and all received good results. However, alternate medication should be used to improve efficacy.

6, grape black bean disease:

After the leaf is injured, it produces needle big brown dot at the initial stage, then develops into yellow brown round spot with diameter of 1-4 mm, the middle turns gray, and finally the diseased tissue dries up and hardens, falls off into perforation. The young leaves are distorted and shriveled after being injured. Fruit is less susceptible to infection after coloring. Green fruit infected early brown round spots, round spots in the middle of gray, slightly concave, reddish-brown or purple edge like "bird's eye" shape, a number of small spots united into large spots; late spots hardened or cracked. The diseased fruit is small, sour and has no edible value. Shoot, petiole, fruit stalk, tendril. After infection, it initially produces round brown spots, later becomes grayish black, the central depression becomes dry ulcer spots, and the severe disease finally dries up or dies.

Control methods:

Grape black bean disease: in the grape growth period, from the beginning of leaf development to the fruit 1/3 mature, spray once every 15-20 days, the medicament can be 80% green Dasheng wettable powder 600 times solution, or with Kejia 1000 times solution + Benzene A 2500 times. When the disease occurs, use Xianlang 1500 times solution +80% Lvdasheng WP 600 times solution, or Xinsheng 1500 times solution to treat, alternately use 2-3 times.