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What are the reasons rice seedlings are slow to tiller
1. Rice bakanae disease: Patterns of occurrence and routes of transmission: The pathogen of rice bakanae disease overwinters on grains and rice straw. The following year, if infected seeds or rice straw are used, the pathogen multiplies as the seeds germinate, invading through the coleoptile or wounds of the seedlings, causing the seedlings to develop the disease and grow excessively tall. Affected seedlings often wither and die. Infected seedlings that do not die are pale yellow-green, grow thin and elongated, generally about one-third taller than healthy seedlings; root development is poor, with few tillers or even no tillering. After infected seedlings are transplanted, they carry the pathogen into the field, causing rice plants to develop the disease. When rice heads and flowers,
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Introduction to the Characteristics and Traits of the Jiudao 45 Rice Variety
I. Breeding Institution: Jilin City Academy of Agricultural Sciences. II. Variety Origin: In 1995, bred by the pedigree method from a cross with Zhongzuo 191-1 as the female parent and Fenghanzao as the male parent. Original code name Jiudao 301. III. Characteristics and Traits: 1. Plant traits: plant height 104 cm, compact plant type, erect leaves, strong tillering ability, about 21 effective panicles per hill; 2. Panicle traits: panicle length 19.2 cm, loose panicle shape, main and tiller panicles uniform, main panicle grain number 181, average grain number per panicle 120
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Detailed Explanation of Key Points for Cultivating Colored Rice
Nutritional and health rice, namely red rice, black rice, and fragrant rice, are traditional premium and precious rice varieties in China. I. Fragrant indica rice. It ranks first among the four premium rice varieties first recommended by the Rice and Rice Products Quality Supervision and Testing Center of the Ministry of Agriculture. After testing and evaluation of 12 indicators, all exceed the first-grade rice standards. Its grains are jade-like in color, and the content of trace elements, especially selenium, is very high, making it the best variety for developing pollution-free green food. The fragrant indica rice plant height is 100 cm, about 150 grains per panicle, 1000-grain weight 28 g, usual yield 500-550 kg per mu, and the whole growth period is 136
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Can emamectin benzoate control the rice leaf roller?
Emamectin benzoate is a new type of high-efficiency semi-synthetic antibiotic insecticide synthesized starting from the fermentation product avermectin B1. It has the characteristics of biological pesticides such as ultra-high efficiency, low toxicity (the formulation is nearly non-toxic), no residue, and no pollution. Compared with avermectin, its insecticidal activity is first increased by 1-3 orders of magnitude. It has extremely high activity against the larvae of Lepidoptera insects and many other pests and mites. It has both stomach poison action and contact action, and has very good effects at very low doses (0.084~2g/ha), and in the process of controlling pests it is harmless to beneficial
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Neolitsea sericea is a native tree species of Shanghai
Neolitsea sericea (Bl.) Koidz. LAURACEAE Current status: rare species. Distributed only in a relatively narrow area along the eastern coast of China. According to literature records, it is also distributed in Chongming Sheyu, Shanghai. Due to excessive felling for firewood, few adult trees remain, and most of them have grown from sprouts. Morphological characteristics: Evergreen tree, up to 12 m tall; branchlets greenish, smooth, current-year branches often covered with brown-yellow silky hairs. Leaves alternate, leathery, oblong or ovate-oblong,
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Detailed Introduction to the Wandao 30 Rice Variety
Wandao 30 (formerly known as 88-23) was developed by the Anqing City Agricultural Science Institute in Anhui Province through systematic selection from variant plants of the late japonica variety Wangcheng Xuanliu. It passed certification by the Anhui Provincial Crop Variety Certification Committee in May 1996. After years of trials and demonstrations, it has shown high yield, good quality, good plant architecture, tolerance to fertilizer, resistance to lodging, and disease resistance, making it especially suitable for double-cropping late rice cultivation in the riverside region. Characteristics: plant height 75-85cm, compact plant type, dark green leaf color, large opening angle of lower leaves, wide leaves, short and erect flag leaf, which is beneficial for photosynthesis. Sturdy stems, tolerant to fertilizer and resistant to lodging.
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Morphological Characteristics and Control Techniques of the Rice Skipper (Pelopidas mathias)
The straight-lined skipper belongs to the order Lepidoptera, family Hesperiidae. Adults have a body length of 17-19 mm and a wingspan of 36-42 mm. The body and wings are both dark brown with a golden sheen, and the antennae are club-shaped. The forewings have 8 white semi-transparent markings arranged in a semi-ring; the hindwings also have 4 white markings arranged in a straight line. The egg is hemispherical, slightly depressed at the top, with a hexagonal reticulated surface pattern; it is light green when first laid and purplish-red before hatching. Larvae generally have 5 instars. Newly hatched larvae have a black head and a grayish-green body; after the 2nd to 3rd instar, the head color gradually fades to light brown. Mature larvae have a body length of
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Introduction to the Characteristics of the Kongyu 131 Japonica Rice Variety
Bred by the Rice Research Institute of the Heilongjiang Academy of Land Reclamation Sciences. In the 1995-1996 regional trials, the average yield was 6767 kg/hm2, an average increase of 1.6% over the control Hejiang 19; in the 1999 production demonstration, the average yield was 7684.5 kg/hm2, an increase of 8.9% over the control Hejiang 19. The growth period is 127 days, requiring an active accumulated temperature of 2320°C. Plant height is 80 cm, panicle length is 14 cm, 80 grains per panicle, 1000-grain weight is 26.5 g, strong tillering ability, and a high percentage of productive tillers. 199
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What are the key cultivation techniques for rice-following beans?
Rice-following bean cultivation is a method in which, after the autumn rice harvest, the field is not ploughed or harrowed; instead, trenches are made, the field is divided into beds, and drainage is carried out, then soybeans are broadcast or dibbled on the bed surface and covered with rice straw. It has the advantages of simple planting, saving labour and time, low input, and good results, and is a short, flat, and fast project for raising multiple cropping and increasing grain, feed, and income. 1. Select improved varieties. There are many local soybean varieties; after mass purification and rejuvenation, those with good ecological adaptability, high yield, and disease resistance and with a moderate growth period can all be selected; for
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A Brief Introduction to the Characteristics and Traits of the A Dao No. 7 Rice Variety
The new late-maturing, high-yield rice variety A Dao No. 7 was introduced by the Fine Seed Multiplication Farm of the First Agricultural Division in 1992 from the Liaoning Provincial Institute of Saline-Alkali Land Improvement and Utilization, and was systematically selected and bred over 5 consecutive years. Characteristics and traits: This variety belongs to the late-maturing, japonica rice type. When sown around the end of April in the Tarim River and Shajingzi reclamation areas, it can fully mature by the end of September, with a whole growth period of 150-155 days. The mature plant height is about 90 cm, the plant type is relatively compact, and it has strong tillering ability. Emergence, heading, and maturity are neat and uniform. The plants are clean and robust, maturing while still green without premature senescence; the panicle position is relatively low, with the flowers hidden among the leaves. The grain
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