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Can 2,4-MCPA herbicide be used at the 2-leaf stage of rice?
Rice and other grass-family crops are sensitive to 2,4-MCPA before the 3-leaf stage, and improper use can easily cause herbicide injury to the crop, with symptoms such as deformed young leaves. After the 4-leaf stage, as leaf age increases, tolerance to 2,4-MCPA gradually strengthens, with the strongest tolerance at the peak tillering stage, and sensitivity gradually increases again after jointing. Therefore, in production it is generally required to apply 2,4-MCPA from the 4-leaf stage of rice to before jointing, and the dosage must not be increased at will, to ensure safety to rice. Nufarm Australia Limited's Agritox
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How to treat garlic leaf blight? Master integrated control techniques in one article
Shandong is a major garlic-producing region, and garlic suffers fewer diseases than other vegetables. However, in recent years, a relatively rare new disease, garlic leaf blight, has appeared in garlic-growing areas, and it strikes fiercely and causes severe damage. Once this disease occurs, it can cause major yield reductions. I. Symptom identification This disease mainly affects leaves and leaf sheaths. Leaf infection falls into two types: first, the tip-blight type, which mainly occurs in the initial infection stage, with the leaf tip turning dark brown and forming many dark purplish-brown oblique parallel stripes on it; in severe cases the lesions extend to 1/3 to 4
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What are the symptoms of apricot leaf marginal scorch?
Apricot leaf marginal scorch is a common physiological disease of apricot trees. It occurs in all apricot-producing regions, and is more severe in the north. Apricot leaf marginal scorch only harms the leaves. Symptoms generally appear first at the leaf margins; in the early stage the margins dry up, and sometimes the dried portions fall off. The lesions gradually spread inward, with a clear boundary between the affected edge and the healthy part. Severely affected leaves curl upward toward the upper surface, and often drop early.
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Detailed Guide to the Control Methods of the Tea Green Leafhopper (Empoasca onukii)
The tea green leafhopper (Empoasca onukii), commonly known as "fuchenzi," is one of the major pests on tea plants in all tea-producing regions of our province. Damage from this pest ranges from minor harm to buds and leaves with reduced yields, to severe destruction of buds and leaves resulting in total crop loss. I. Morphological Characteristics The tea green leafhopper belongs to the order Homoptera, family Cicadellidae. Its life cycle passes through three stages: egg → nymph → adult. 1. Egg: crescent-shaped, about 0.8 mm long and about 0.15 mm wide, initially milky white, gradually turning pale green; before hatching, a pair of red eye spots is visible through the front end. 2. Nymph: 5
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Annam leaf turtle spotted in the wild for the first time in 65 years
Researchers with the Asian Turtle Program have announced that late last month, in a wild area of Quang Nam Province, Vietnam, they captured an Annam leaf turtle, a species listed by the International Union for Conservation of Nature as one of the world's 25 most endangered turtles. It is said that the blood of the Annam leaf turtle can be used as a traditional medicine for treating heart disease. This year Vietnam passed a new law stating that it is illegal for anyone to keep or sell an Annam leaf turtle. The Asian Turtle Program is running an education and awareness campaign in Quang Nam Province, Vietnam, to guide people toward understanding the importance of protecting the Annam leaf turtle
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Introduction to the excellent garlic variety Purple-Skinned Hard-Leaf Ershuizao
Purple-Skinned Hard-Leaf Ershuizao is a local variety from Peng County on the outskirts of Chengdu, Sichuan. The plant height is 74 cm, and the plant spread is 15 cm. The pseudostem is about 33 cm long and 1.2 cm thick. The whole plant has 12~13 leaves, with the largest leaf 42 cm long and 2.5 cm wide. The garlic bulb is round, with a light purple outer skin, a transverse diameter of 3~4 cm, and a single bulb weight of 13~16 grams. Each bulb has 8~9 cloves, mostly arranged in two layers: 6 cloves in the outer layer and 2~3 in the inner layer, with an average single clove weight of 1.8 grams. The clove skin has 2 layers, is purplish red, and relatively thick. The bolting rate is about 95
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How to prevent and control peach leaf curl? A detailed explanation of practical technical points
I. Symptoms and damage. This disease occurs from time to time in the south, and when severe it causes branch dieback and affects ornamental value. The disease mainly damages leaves. When leaves unfold in early spring, the leaf margins curl downward, and the diseased leaves become blistered in part or entirely, the leaves thicken, become brittle in texture, and turn yellow or red, with the leaves distorted and deformed. In early summer, a grayish-white powdery layer forms on the diseased parts, and when the disease is severe the leaves fall early. When young shoots are damaged, they appear grayish-green or yellow, with short and thick internodes and slight curvature; the upper leaves cluster and curl. When the disease is severe, the branches die.
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Lily Leaf Blight: Control Methods and Key Technical Points
Symptoms: Circular or oval lesions form on the leaves, varying in size, with a length of 2 to 10 mm or more. They range from pale yellow to light brown. In some varieties, the spots are light brown, surrounded by a distinct reddish-purple margin, and under humid conditions the spots quickly become covered with a layer of gray mold. When dry, the lesions become thin, easily crumble, are transparent, and generally appear grayish-white. In severe cases, the entire leaf dies. When the stem is infected, it rots and breaks at the point of infection, and the buds turn brown and rot. Spots on the flowers are brown and, when moist, quickly become a sticky mass covered with a gray
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Occurrence Patterns and Control Methods of Lily Leaf Blight
Lilies originate from the eastern and central regions of China. They are relatively cold-tolerant, prefer strong light, and do not tolerate shade. Insufficient light will affect growth and flowering. A well-drained sandy loam rich in organic matter is suitable. Their disease resistance is poor, and they are susceptible to disease under high temperature and high humidity conditions. Lily plants are upright and elegant, with large, brightly colored flowers and many varieties. They are suitable for planting in patches or clumps at the edges of lawns or for forming flower borders, creating a quiet and harmonious effect. Lilies are also treasures for potted flowers and cut flowers. Lily leaf blight, also known as lily gray mold, affects the plant's photosynthesis, hinders growth, and reduces ornamental value. When the disease occurs severely,
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Symptoms and Control Methods of Bacterial Leaf Spot in Lilies
Bacterial leaf spot is an important disease of lilies, occurring and distributed in certain regions, and can develop both under protected cultivation and in open fields. Typically 5%-10% of plants are affected, impacting yield and quality to some extent. In severely affected plots, the field incidence rate can reach over 20%, significantly affecting lily production. [Symptoms] This disease can affect all parts of the lily, with symptoms mostly appearing on above-ground parts. Initially, densely packed water-soaked greenish-brown nearly oval small spots appear on the leaves, which later develop into nearly spindle-shaped yellowish-brown to dark brown necrotic lesions, slightly sunken, with water-soaked edges
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