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How to prevent empty and blighted rice grains? Master these technical measures
Empty and blighted rice grains refer to unfertilized empty grains and half-empty grains that fail to develop after fertilization, and this has a great impact on rice yield. Therefore, in rice production, in addition to striving for more panicles and larger panicles, it is also necessary to reduce empty and blighted grains, improve the seed-setting rate, and increase the 1000-grain weight in order to obtain high yields. At present, rice is in the grain-filling and ripening stage. To prevent the occurrence of empty and blighted rice grains and achieve the goal of high yield, comprehensive preventive measures must be taken. The specific measures are as follows: 1. Select varieties with good seed setting. Rice varieties differ in physiological morphology, and the seed-setting rate varies greatly.
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How are light pruning and deep pruning carried out on mature tea plants?
Light pruning (1) Light pruning: The purpose of light pruning is to promote the sprouting and growth of tea buds, increase the production density, and strengthen the vigor of the tea plant. It is an indispensable technical measure for creating and maintaining a good plucking surface. The degree of light pruning is measured by cutting off 3-5 cm of branches and leaves from the top of the canopy, or alternatively by cutting off the previous year's autumn shoots while leaving the summer shoots. For tea plants of the small and medium-leaf varieties, the light pruning form is best done by cutting the canopy surface into an arc shape, as this can increase the width of the plucking span and is beneficial for raising the per-unit yield. For tea plants in the young and mature stages, light pruning can be carried out once a year or every other year.
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Occurrence Patterns and Control Methods of Garlic Blight
I. Symptoms Garlic blight mainly damages the leaves. In the early stage of infection, pale white to light yellow water-soaked spots appear in the middle of the leaf or at the leaf tip, with light green edges. The lesions expand quickly, and within 3 to 5 days half of the leaf or the entire leaf wilts and droops. When humidity is high, the lesions rot, causing the whole plant to die. II. Pathogen and Transmission Routes The pathogen overwinters as mycelium and chlamydospores in the underground parts of diseased plants or in the soil. When conditions are suitable the following spring, the diseased parts produce sporangia and zoospores. The zoospores spread through wind, rain and irrigation water, causing primary infection and secondary infection. III
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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 damage does tea blister blight cause to the growth of tea plants
Tea blister blight, also known as blister-like leaf blight and leaf gall disease, is an important disease of young buds and leaves. It is distributed in all tea-growing regions across the country and mainly damages tender leaves, tender stems, new shoots, flower buds, fruits and leaf stalks. When tender leaves are infected, small translucent spots appear at first, pale yellow to reddish brown, then expand into round spots with a diameter of 0.3-1.25 cm. The front of the lesion is sunken, pale yellowish brown to dark red, and the back is raised, forming steamed-bun-shaped blister spots, on which there is grayish white, pink or gray powdery material. Later the powder disappears, and the raised part shrinks to form brown dead spots, with a
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Symptoms and Control Methods of Lily Leaf Blight
Lilies are native to 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. They do best in well-drained, organic-rich sandy loam. They have poor disease resistance and are susceptible to disease in hot, humid environments. 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 in flower borders, creating a serene and harmonious effect. Lilies are also prized as 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 lily blight
Symptoms: This disease mostly occurs on the young leaves of plants, and stems and flowers can also be affected. In the early stage of the disease, oily spots appear on infected leaves, which gradually expand and turn grayish green. In severe cases, the leaves and flowers become soft-rotted. On infected stems near the ground, the diseased part is water-soaked, turns brown, and shrinks, and the plant wilts, lodges, and dies. If the bulb is infected when it sprouts, only the top of the young stem withers. When humid, white mold grows on the diseased part. Pathogen: The pathogens are Phytophthora cactorum (Leb. et
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Occurrence of wheat and barley sheath blight and control recommendations
According to surveys by the forecasting stations of each county (city, district), wheat and barley sheath blight has now occurred widely and will enter the peak damage stage. All localities must seize the appropriate timing and promptly organize the broad masses of farmers to carry out control. I. Occurrence situation and trend analysis The characteristics of wheat and barley sheath blight occurrence this year: First, the occurrence period is normal. Due to the low temperatures last winter and this spring, wheat seedlings grew weakly, which was unfavorable for the occurrence of wheat and barley sheath blight. The earliest detection in the whole city was in Xiangshui in early mid-February, and large areas were detected in late February and early March. Second, the general incidence rate and
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How to prevent and control southern blight in lilies? A full analysis of the key methods
Symptoms: The whole plant wilts, white mycelial strands or rapeseed-like tan-colored small sclerotia wrap around the stem base, and the affected part turns brown and rots. Large amounts of white mycelial strands and tan-colored sclerotia are visible on the soil surface. Pathogen: Sclerotium rolfsii Sacc., called the sclerotium-forming fungus, belongs to the Deuteromycotina fungi. The hyphae are white and silky, spreading in a fan-like or radial pattern, then gathering into mycelial strands or tangling into sclerotia. The sclerotia resemble rapeseeds, initially white to yellowish-white, later turning tan, round, with a smooth surface. Transmission routes: (1) The pathogen
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Symptoms and Control Methods of Botrytis Blight in Primroses
Botrytis blight is a common and widespread disease of primroses. [Pathogen] Botrytis cinerea Pers. et Fr. [Symptoms] Water-soaked spots appear at leaf tips or leaf margins, then gradually enlarge, turn brown to black, and rot; stems develop irregular brown lesions and are prone to soft rot; flowers turn brown, rot, and drop off. In the late stage of the disease, a grayish-brown mold layer forms on the affected parts. [Disease cycle] The pathogen overwinters in diseased plant residues or in the soil. Conidia are spread by wind and rain
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