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12% Rice Power is worthy of being called the nemesis of rice diseases
12% Rice Power emulsifiable concentrate (i.e. 12% Green Copper Emulsifiable Concentrate, rice-specific type) is a fungicide specially for rice. According to large-scale demonstration and promotion in major rice-producing areas such as Hunan, Hubei, Guangxi and Zhejiang, it has good control effects on many fungal and bacterial diseases of rice such as bacterial leaf streak, bacterial blight, rice false smut and rice blast, and its effect on bacterial leaf streak is especially remarkable. Rice Power is a low-toxicity pesticide; under natural conditions it degrades quickly, with no residue and no pollution, and is safe to humans, livestock and the environment; among its components
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Supplementary zinc fertilization in rice paddies can effectively prevent "sitting stumps"
After rice seedlings are transplanted, they may be slow to grow, fail to turn green, or fail to tiller and even shrink after turning green, which farmers generally call "sitting stumps." Fields with "sitting stumps" mostly occur in low-lying, damp areas and in cold, waterlogged, or poor fields, but they sometimes also occur in fertile fields. There are many causes of this phenomenon, and zinc deficiency is one very important cause. The symptoms of zinc deficiency "sitting stumps" in rice are: the leaf tips of the basal leaves of the rice plant dry up, and yellow-brown to reddish-brown irregular patches appear in the middle section of the leaves; and these gradually spread from the old leaves
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What causes rice to fail to set grain?
It is understood that rice is extremely sensitive to temperature during the booting and heading stages. The most suitable temperature is 25 to 30 degrees Celsius, and temperatures above 30 degrees will have adverse effects. If the booting stage encounters continuous high temperatures above 35 degrees, the rice floral organs will be underdeveloped, the pollen will develop poorly, and its vitality will decline. If the heading and flowering stage encounters continuous high temperatures above 35 degrees, heat damage will occur, affecting pollen rupture and pollen tube elongation, resulting in failure to fertilize and the formation of empty glume grains, producing what farmers call flowering without grain setting.
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Detailed Explanation of Nutrient Uptake Patterns of Rice at Different Growth Stages
The nutrient uptake of rice at various growth stages differs considerably depending on the type. Double-season rice has a short growth period, especially the shortened vegetative growth period in the field, so vegetative growth and reproductive growth overlap shortly after transplanting. That is, tillering in the field begins at the same time as panicle differentiation, and the peak tillering stage occurs during panicle differentiation, thus forming a prominent nutrient uptake peak 2 to 3 weeks after transplanting; single-season rice forms two nutrient uptake peaks 2 to 3 weeks and 7 to 9 weeks after transplanting. The uptake rates of various nutrients by rice all reach
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Key Points of Water Management at Different Growth Stages of Rice
Rice has relatively strict requirements for water conditions, and the water demand varies at different growth stages. To ensure stable and high yields of rice, scientific water management should be carried out according to the different growth stages. 1. Shallow water and frequent irrigation at the tillering stage. Shallow water and frequent irrigation at the tillering stage allows good light penetration to the base of the rice plants, so that sunlight can shine directly on the stems of the rice plants, raising the water temperature and soil temperature, increasing oxygen in the soil, promoting root development, improving fertilizer uptake capacity, promoting early tillering, and increasing the rate of tillers forming panicles. The depth of irrigation water should be based on weather conditions, generally 3-5 cm, and a shallow water layer should be used on cloudy and rainy days. High
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Detailed Explanation of Key Technical Points for Soil Testing and Formulated Fertilization in Rice
I. Fertilization Principles 1. Soil testing and formulated fertilization for rice should follow the principles of determining yield target based on soil, determining fertilizer rate based on yield target, supplementing deficient nutrients, combining organic and inorganic fertilizers, and balanced application of nitrogen, phosphorus and potassium. First, soil testing is required. Soil testing is the prerequisite for soil testing and formulated fertilization; through analysis and determination of soil nutrients, the soil nutrient status and fertilizer supply capacity can be accurately grasped, providing a scientific basis for formulated fertilization. Second, a good formula must be prepared. The formula is the key to fertilization. On the basis of soil testing, according to soil characteristics, cultivation practices, crop nutrient requirements, production level and climate conditions,
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Rice pests: Cletus trigonus and Cletus pugnator
Scientific names: Cletus trigonus (Thunberg) and Cletus pugnator, both belonging to Hemiptera, family Coreidae. They are distributed in the Yangtze River basin, Jiangsu, Henan, Yunnan, Guizhou and other provinces. Hosts include rice, amaranth, prickly amaranth, alternanthera, Mexican tea, strawberry, corn, soybean, etc. Damage characteristics: adults and nymphs pierce and suck the sap of rice and other plants, or damage strawberry berries. Morphological characteristics: adult Cletus trigonus body length 7.5-8.8 mm
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What to Do About the Green Leafhopper on Rice? A Detailed Guide to Effective Control Methods
Scientific name: Homoptera, Delphacidae. Distributed in the wild rice stem (Zizania latifolia) and rice-growing areas of both southern and northern China. Hosts include rice, wild rice stem, and wild Zizania latifolia. Damage characteristics: adults and nymphs pierce and suck the sap of rice; affected leaves develop yellowish-white to light brown or reddish-brown spots, after which the leaves gradually turn yellow and dry up from the tip toward the base; excrement covers the leaf surface, forming a sooty mold-like coating; the female's egg-laying scars are initially water-soaked, then secrete white downy waxy powder; once wounds appear, the plant loses water, wilting in clumps and dying off in patches. Morphological characteristics: male adult body length 5-6.1 mm,
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What are the control methods for rice bacterial leaf streak?
Rice bacterial leaf streak, or rice fine stripe disease for short, is an important disease in rice production in China. Its pathogen belongs to the genus Xanthomonas, and the bacteria mostly enter through the leaf stomata; symptoms can appear at any growth stage of rice. The lesions are short, fine, narrow stripes, with the striping appearing between the leaf veins. When held against the light, the lesions appear semi-transparent and water-soaked, turning red later; the bacterial masses on the stripes are very numerous, especially on the underside of the leaf, and are not easily dislodged when dry. Because hybrid rice still lacks disease-resistant combinations, and because the disease occurs over a wide area with an uneven distribution, this creates great difficulties for seed quarantine;
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How Is Rice Bred? A Detailed Explanation of Methods and Technical Key Points
In the process of hybrid rice breeding, the sterility of the rice male sterile line is affected by photoperiod-sensitive factors. The male sterile line generally shows sterility under the long daylight of April to September, while it shows fertility under the short daylight of September to April of the following year. Therefore, "two-line hybrid rice breeding" can increase yield by more than 20% compared with "three-line hybrid rice breeding", and it also overcomes the problems of a single source of male sterile cytoplasm and the relatively large limitation in the use of heterosis. The gene compatibility between indica and japonica subspecies is determined by their compatibility substances.
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