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Large-scale leaf-rolling of the central leaves of rice may be related to excessive application of quinclorac
For some time recently, hundreds of readers across our province have called to report large-scale leaf-rolling of the central leaves of rice seedlings, which is even more common in direct-seeded rice production. Many readers brought in diseased plants. The root systems of the diseased plants are generally fairly normal, and there are no obvious disease spots or other symptoms on the leaves. After examining the submitted diseased plants, relevant experts from the Institute of Plant Protection of the Provincial Academy of Agricultural Sciences and other units preliminarily diagnosed that the leaf-rolling of the central leaves of rice is not caused by viruses or other pathogenic microorganisms, but may be phytotoxicity caused by herbicides such as 2,4-D and quinclorac, or may be caused by physiological
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Effective control methods for leaf beetle pests on licorice
The main species of leaf beetles harming licorice include Diorhabda tarsalis, Pynrrhalta aenescens, Monolepta quadrigutdata, Diorhabda rybakowi, Ceytra sp., Colasposoma dauricum, Coptoc
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Symptom Identification and Control Methods for Licorice Gray Leaf Spot
It damages the leaves, forming nearly round brown lesions with gray centers. Control methods: (1) Clear the garden in winter and dispose of plant debris. (2) During the disease period, spray 1:1:120 Bordeaux mixture or 70% thiophanate-methyl wettable powder at 1500-2000 times dilution.
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How to prevent and control leaf blight in Schisandra chinensis? Practical tips shared
Leaf blight in Schisandra chinensis mostly occurs from late May to mid-July, with the lesions appearing scorched yellow. It initially starts at the leaf tip and gradually expands and spreads; in severe cases, the entire leaf turns yellow and dies. The disease is severe under high temperature and high humidity with poor ventilation. Control methods: spray with 400-500 times zineb and 1500 times thiophanate-methyl; it is best to spray once a week before the disease occurs, for 2-3 consecutive sprays, or use Bordeaux mixture sprayed once a day.
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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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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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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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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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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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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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