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How to identify common easily confused symptoms in rice
I. Several kinds of bacterial wilt 1. Purple sheath blight bacterial wilt. Mostly seen in the late stage of late rice, often occurring in clumps in the field, and also with several plants affected in one hill. The base tissue of the rice is soft-rotted, with dark brown lesions. Peeling open the basal leaf sheath and stem, many black sclerotia smaller than amaranth seeds can be seen. 2. Bacterial foot rot bacterial wilt. Occurs sporadically in the field, generally 1-3 plants affected in one hill; the base of diseased plants shows mouse-gray rot, the root system is sparse and decayed, and peeling open the basal stem reveals it is full of foul water, with no sclerotia. 3. Physiological bacterial wilt. The rice stem shrinks and dries, and when the base of the rice stem is pinched by hand it is shrunken and hollow, making the plant prone to lodging, resembling damage by brown planthopper sclerotia. But there is no insect body at the stem base, no lesions, and no sclerotia in the leaf sheath and basal stalk; it mostly occurs when late rice is near maturity, with patches and blocks of bacterial wilt and wilting.
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Detailed Explanation of Key Technical Points for Controlling Two Diseases and Three Pests of Rice
The two diseases and three pests of rice refer to rice blast, sheath blight, rice stem borers, rice planthoppers, and the rice red-spotted black spittlebug. They cause great harm to rice and should be given attention for control. Rice blast: Long-term deep water irrigation or excessive drought, and one-sided application of nitrogen fertilizer lead to severe rice blast. There are three susceptible periods in the life of rice, namely the seedling stage, the peak tillering stage, and the heading and full heading stage. Neck blast has the greatest impact on rice yield and should be prevented early at the breaking stage and full heading stage. Rice blast is divided into: seedling blast, leaf blast, node blast, neck blast, and grain blast. Rice blast
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Detailed Explanation of the Key Points of the "Three Supers" Rice Cultivation Technique
I. Select suitable varieties. Adapt to local conditions and choose high-quality varieties that can mature normally and safely in the local area, with moderate tillering, relatively large panicles, relatively high grain weight, strong stress resistance and disease resistance, upright leaves, a compact plant type, and outstanding high-yield performance. II. Sow early at the right time and sow sparsely to cultivate strong seedlings. (1) Seedling raising preparation. 1. Seedbed preparation. ① Seedbed selection: choose a pollution-free, flat and loose, fertile soil, good water-holding, wind-sheltered and sunny plot as a dedicated seedling field. ② Land preparation and arching: in order to achieve ultra-early sowing, prepare the seedbed soil and set up the frame the previous year, cover with plastic film in early to mid-March to promote thawing and raise soil temperature, shallowly plow the seedbed land 10 cm, and rake it level and fine. Make the bed 10 days before sowing, and dig a 13 cm deep ditch around the seedbed.
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Detailed Explanation of the Three Fertilizations for Rice and Their Application Techniques
Scientific fertilization is one of the important measures for achieving high quality and high yield in rice. However, rice fertilization is a highly technical task, and in practice it must be flexibly managed according to variety characteristics, soil fertility, climatic factors, and cultivation conditions. As is well known, the fertilizer requirements of rice are expressed in the nutritional period, the critical nutritional period, and the period of maximum nutritional efficiency. For example, early rice has a short growth period and relatively low fertilizer demand, so fertilization should be early and concentrated. Middle rice and late rice have longer growth periods, high fertilizer demand, and strong absorption intensity, so the number of topdressings should be increased and the proportion of topdressing raised.
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Detailed Explanation of the Three-Drainage and Three-Irrigation Water Management Measures for Rice
1. Three Drainages. First drainage: From the critical tillering stage to the stage when the penultimate leaf tip emerges (20 days before heading), the field should be drained and sun-dried to control the growth of ineffective tillers. For fields with vigorous seedling growth and dark green leaf color, as well as fertile fields and cold-waterlogged fields, heavy sun-drying should be carried out to promote fading of leaf color; for fields with poor seedling growth, as well as lean fields and fields with a low groundwater table, multiple light sun-dryings should be carried out, combining sun-drying with exposure, with the degree judged by the field not sinking underfoot. Second drainage: From 5-7 days before heading to the heading stage, a second drainage should be carried out to improve rice root vigor and enhance the roots' ability to absorb nutrients
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Key Technical Points for High-Yield Cultivation of Intercropped Indica and Glutinous Rice
Rice "indica-glutinous intercropping" refers to a configuration method for cultivating hybrid indica rice and glutinous rice, that is, selecting medium-stem hybrid indica rice and tall-stem glutinous rice varieties, and using the wide rows within the wide-narrow row arrangement of hybrid indica rice to plant additional single rows of glutinous rice at a certain band width, row ratio and width, forming a composite of hybrid indica rice and glutinous rice within the same field. Based on the principles of three-dimensional agriculture, it uses the characteristics of different rice varieties, different maturity periods and different plant heights for intercropping cultivation, so that temperature and light resources are utilized at multiple levels,
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Forecast for the occurrence trend of the first generation of the striped stem borer in rice is released
1. Occurrence level: The first generation of the striped stem borer, the main rice pest in our city, is expected to occur at a moderate-to-severe level, with the affected area in the city reaching more than 250,000 mu, of which more than 50,000 mu are early-planted idle fields. 2. Occurrence period: Moths seen under light on April 11, the beginning of the peak moth emergence period 5/9-12, the peak moth emergence period 5/20-24; the peak egg hatching period 5/27-5/30, the peak period of first and second instar larvae 6/4-6/10, the occurrence period is 3 days later than the average of the past three years. 3. Forecast basis 1. Development progress: This year 4/2
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Key points of high-yield cultivation techniques for rice intercropping of hybrid rice and glutinous rice
Rice "hybrid-glutinous intercropping" refers to the intercropping cultivation of hybrid rice and glutinous rice. That is, medium-stalk hybrid rice and tall-stalk glutinous rice, using the advantage of the wide rows in the wide-narrow row strip planting of hybrid rice, and adding a single row of glutinous rice according to a certain belt width, row ratio and width. 1. Main advantages of hybrid-glutinous intercropping technology. 1. Increasing rice yield: Test results show that the combined total of the two crops under hybrid-glutinous intercropping increases yield by 28 kg per 667 sq m compared with ordinary hybrid rice, and by 110 kg compared with conventionally pure-planted glutinous rice. 2. Increasing income: Glutinous rice is
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What causes rice seedlings to sit and bunch up?
After the transplanted rice was thrown and planted in the main spring season this year, many farmers came to me and said: "Their seedlings have been thrown and planted for more than ten days, why are they growing shorter and smaller the more they grow?" Our agricultural technology station investigated the seedling growth situation across the whole township, and finally found the causes of the seedlings growing shorter and smaller the more they grow, mainly: 1. Herbicides were used in a mixed and messy way, for example: after using the "Yelao" herbicide, the water flooded too deep, no new heart leaves grew, and some applied "Qiangxin" weeding fertilizer, etc., which inhibited rice growth and caused the seedlings to grow shorter and smaller the more they grow. 2. In muddy fields, rice lacks zinc,
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Key Cultivation Techniques for Rice Variety II You 084
II You 084 is a new hybrid indica rice variety bred by the Zhenjiang Institute of Agricultural Sciences in Jiangsu. It shows high resistance to bacterial leaf blight and rice blast. It participated in the Jiangsu Province hybrid indica rice regional trial from 1999 to 2000, was exceptionally admitted to the Jiangsu Province production trial in 2000, and passed the approval of the Jiangsu Province Crop Variety Approval Committee in April 2001. It passed national approval in November 2003. On September 6, 2003, it set a new world record for rice yield per unit area at 1231.17 kg/mu. It is exclusively developed by Jiangsu Mingtian Seed Industry Technology Co., Ltd. Characteristics
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