Gray spot Learn more about Gray spot
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What is soybean gray spot disease and how to prevent it?
What is soybean gray spot disease and how to prevent it? Ask to instruct soybean gray spot disease: (1) harm and symptom soybean gray spot disease calls brown spot disease again, spot disease or frog eye disease. Soybean gray spot is a worldwide disease, and also an important disease in main soybean producing areas in China, especially in Northeast China. The pathogen is located in the eastern part of Heilongjiang Province.
2018-09-10 -
The latest course of techniques and methods for the control of tomato gray leaf spot
Tomato gray leaf spot often occurs in tomato production, it will destroy the photosynthesis of leaves, reduce the yield of tomato, and bring huge losses to farmers. So how to control tomato gray leaf spot? Let's get to know it. 1. Symptoms of the disease
2020-11-10 The latest tomato gray leaf leaf spot control technology method tutorial -
Control techniques of Gray Leaf spot in Tomato
Control techniques of Gray Leaf spot in Tomato
2019-07-17 -
What are the causes and control methods of gray leaf spot of corn, apple, red bayberry, cowpea and soybean?
Grey spot, also known as brown spot, spot or frog eye disease, is a worldwide disease, so what are the causes and control methods of gray spot of corn, apple, red bayberry, cowpea and soybean? Let's learn more about it. 1. Corn gray leaf spot 1. Sowing time is in
2020-11-09 Corn apple bayberry cowpea soybean gray spot disease occurrence -
What are the causes and control methods of gray leaf spot of corn, apple, red bayberry, cowpea and soybean?
Grey spot, also known as brown spot, spot or frog eye disease, is a worldwide disease, so what are the causes and control methods of gray spot of corn, apple, red bayberry, cowpea and soybean? Let's learn more about it. Corn gray leaf spot, 1. Corn sown in the first and middle of May
2019-04-12 -
Key points of Control techniques of Maize Gray Leaf spot
The gray leaf spot of maize can occur in the whole growth period, but the disease is the most serious in the heading and filling stage. The initial stage of the disease is water-stained light brown spots, these spots extend parallel to the leaf veins, often rectangular, more obvious to the light perspective, gray in the middle of the disease spot, with brown lines on the edge. The size of the lesion is 2 mi 4 × 10 mi 24 (mm).
2018-09-13 -
Control of Gray Leaf spot of Soybean
Grey leaf spot is common in all soybean producing areas in China, but it is the most serious in Northeast China, all parts of the plant will be damaged, the damaged soybean seeds will become smaller and the oil content will decrease. Main symptoms: after the plant and some pods were infected, the disease spot was formed, and the disease spot of the adult leaf was round.
2020-11-08 Species soybean gray spot disease prevention and control in our country each -
Characteristics and control methods of gray leaf spot of garlic
The main results are as follows: (1) the symptom characteristics mainly harm the leaves. The disease spot is long oval, light brown at first, then gray-white, fine gray-black mildew on both sides of the leaf, and when the disease spot is serious, the disease spot converges, resulting in local death of the leaf. The sun is warm and the night is cool, and the foggy and dewy weather is serious. (2) ① was used to remove the injured leaves in time.
2018-09-16 -
What is the symptom of big leaf yellow poplar gray spot disease?
Symptoms of gray spot of Populus tomentosa: occurs on the leaves of Populus tomentosa. The small chlorotic macula appeared on the infected leaves at the initial stage, and then gradually expanded into irregular spots, showing gray, grayish white or irrigated yellow. The boundary between the sick and the healthy is often brown or dark brown everywhere, and the edges are often raised. In the later stage, several disease spots are often linked together, accounting for 1/2 to 1/3 of the total leaf area. when the damage is serious, the diseased leaves can fall off in the same year and even cause the branches to die.
2019-01-11 -
Integrated control of loquat gray leaf spot
Loquat gray leaf spot is also known as "wheel spot". It is the most important disease of loquat. Encroach on branches, leaves, flowers, fruits. There are two types of acute and chronic types: chronic disease spots on the leaves, initially light brown round spots, and then connected into irregular large spots, scattered small black spots. The disease of twigs is first caused by watery browns.
2018-09-15 -
What are the animals?
What are the animals?
2018-07-03 -
Control of gray spot of Radix Isatidis
Symptoms of Radix Isatidis leaves on both sides of a round spot, 2 cm in diameter, slightly sunken, gray-white in the center, brown margin. In the later stage, the disease spot becomes thin and brittle, cracked or perforated, and brown mildew grows on it when it is wet, which is the conidiophores and conidia of pathogens. Old
2020-11-08 Species Radix Isatidis Gray spot Disease Prevention symptom damage -
Lettuce planting techniques: what is lettuce gray mold?
What is lettuce gray mold? What harm does lettuce gray mold have? How to prevent and cure lettuce gray mold? Please give guidance on lettuce gray mold is a common and harmful disease of lettuce. The disease not only harms lettuce, but also harms more than 20 kinds of vegetables and other farmers, such as tomato, eggplant, pepper, cucumber, watermelon and so on.
2018-07-18 -
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 a great impact on the growth and development, yield and quality of grape plants. What are the control methods for common diseases such as grape powdery mildew, white rot, anthracnose and so on? What kind of medicine should I take? Portugal
2020-11-09 Grape white powder disease white rot anthrax etc. common -
Control techniques of Soybean Gray Leaf spot
1. Disease: mainly harms the leaves at the adult stage, and infects seeds, seedlings, stems and pods. Round brown spots appeared on the cotyledons of young seedlings born with diseased grains. Irregular plaques may also be formed in the later stage. When it is wet, the central part of the disease spot on the back of the leaf is full of gray mildew layer, which is the conidia of the pathogen. 2. Prevention and control methods:.
2018-07-24 -
Pollution-free control techniques of gray mold of leek
The main results are as follows: (1) the symptoms and epidemic rules are mainly harmful leaves, which can be divided into three types: White spot type, which forms water-stained gray spots on both sides of leaves, oval or fusiform, the periphery is light yellow, and the disease spot expands in the later stage, causing half-leaf or whole leaf to die. Sparse gray mold layer occurs when it is wet. Dry tip type, is in.
2018-09-16 -
Identification of common confounding symptoms in rice
1. Several kinds of Ralstonia solanacearum 1. Sclerotinia sclerotiorum. It is more common in the late stage of late rice, which often occurs in clumps in the field, and there are several plants in a hole. The tissue at the base of rice is soft rotten and has dark brown spots. Peeling off the basal leaf sheath and stem, we can see that there are many black sclerotia smaller than amaranth seeds. 2. Bacterial base rot and wilt. Sporadic occurrence in the field, generally 1 in 1 point, 3 plants fell ill, the base of the diseased plant showed rat gray rot, the root system was rare and decayed, peeled off the basal stem, full of smelly water, sterile sclerotia. 3. Physiologically withered. The stem of rice plant shrinks and the base of rice stem is pinched by hand.
2019-01-16 -
Prevention and control of rhododendron brown spot
1. The primary reddish-brown dot on the diseased leaf gradually expands into a nearly round, or polygonal spot limited by the vein of the leaf, with a diameter of 1mm to 5mm, dark brown; sometimes gray-white in the center, the edge is not obvious. The disease spot leaves are one-sided deep and the back color is light, and the disease spots on the leaf edge can be connected to each other, and most of them produce gray-black mildew spots on the surface of the disease part when it is wet. 2. The pathogen of rhododendron brown spot is CercosporarhododendriFerraris, which belongs to Trichoderma. The gray-black mildew spot on the disease spot is
2019-01-16 -
What if the rubber tree is infected with the disease?
Rubber trees are mainly susceptible to anthracnose and gray spot. Anthracnose mostly occurs on leaves, especially on both sides of leaf veins. The lesion is a round or oval gray spot at first, and then gradually extends to the whole leaf: black particles appear on the spot in the later stage of anthracnose, and pink colloid can be extruded under wet conditions.
2019-03-04 -
Identification and diagnosis of main diseases and pests in melons and vegetables
Identification and diagnosis of main diseases and pests in melons and vegetables
2018-07-10