How is the resistance level of rice varieties to rice blast disease determined?
The resistance level of rice varieties to rice blast disease is determined in this way. The lower the level, the higher the resistance; On the contrary, the higher the level, the lower the resistance. The details are as follows:
Disease level and damage status Resistance level
0 No lesions on the leaves, high resistance (HR)
1 The lesions are brown spots the size of needle heads. Spot Resistance (R)
2 Brown spots are slightly larger
3 Round to oval gray lesions with brown edges, and the diameter of the lesions is 1-2mm. Medium Sensitivity (MR)< /p>
4 Spindle-shaped lesions, 1-2cm long, usually limited to between two leaf veins, and the affected area does not exceed 2% of the leaf area. Medium susceptible (MS)
5 Spindle-shaped lesions , the affected area does not exceed 10% of the leaf area (S)
6 spindle-shaped lesions, the affected area does not exceed 11-25% of the leaf area
7 spindle-shaped lesions , the affected area does not exceed 26-50% of the leaf area
8 spindle-shaped lesions, the affected area does not exceed 51-75% of the leaf area High Susceptibility (HS)
9 Full High susceptibility to leaf dieback
What does it mean when the rice blast comprehensive index is 5.0--9.0, and the panicle blast loss rate is the highest at level 9?
Rice blast comprehensive index 5.5 is a disease resistance index, and there is 6.0. Generally, the lower the better, indicating strong disease resistance~
The higher the ear blast loss rate Same thing!
What are the rice varieties resistant to rice blast?
The resistance level of rice varieties to rice blast is determined in this way. The lower the level, the higher the resistance; conversely, the higher the level. , the lower the resistance. The details are as follows: Disease level, damage status, resistance level 0 No lesions on the leaves, high resistance (HR) 1 The lesions are brown spots the size of a pinhead (R) 2 The brown spots are slightly larger 3 Round to oval gray lesions, The edge is brown, and the diameter of the lesion is 1-2mm. Medium Sensitivity (MR) 4 Spindle-shaped lesions, 1-2cm long, usually limited to two leaf veins, and the affected area does not exceed 2% of the leaf area. Moderate Sensitivity (MS) 5 Spindle disease Spots, the affected area does not exceed 10% of the leaf area. Sensitivity (S) 6. Fusiform lesions, the affected area does not exceed 11-25% of the leaf area. 7. Spindle-shaped lesions, the affected area does not exceed 26-50% of the leaf area. 8 Spindle-shaped lesions, the affected area does not exceed 51-75% of the leaf area. Highly susceptible (HS) 9 The whole leaf dies. Highly susceptible national-approved rice variety: 5you 360. New national-approved rice variety: Jin 7you 18. National-approved rice. New variety: Xu 68 You 201 · New national-approved rice variety: Su Xiu 9 · New national-approved rice variety: 10 You 18 · New national-approved rice variety: Jin 7 You 58 · New national-approved rice variety: Jinyuan D1 · National New rice variety approved by the state: Jin 9 You 78 · New rice variety approved by the state: Xinhanyou 26 · New rice variety approved by the state: Jiaohan No. 1 · New rice variety approved by the state – II You 264 · High-yielding and high-quality rapeseed hybrid Mianyou No. 11 · Super rapeseed - Zhongyouza No. 2 · Famous double-low rapeseed variety - Suyou No. 1 · Famous and high-quality rice species Tianyou 998 (Tianyou silk seedlings) · New japonica black glutinous rice variety "1032" · New glutinous rice Variety Shaonuo 97-14 · New high-quality aromatic rice variety – Zhongjian No. 2 · Medium indica Zhejiang 1500 · Rice variety introduction – early indica Jiayu 280 · Rice variety introduction – late Nuo Shaonuo 119 · New rice variety – Liao Nong 9911 · New rice varieties - Liaojing 92-34 · Introduction to excellent rice varieties · Hybrid late indica - "Zhongzheyou No. 1" · New rice products - Jindao No. 1 · New rice products - Zhenyou 998 · New rice products - —Boyou 998 · New rice variety Wanchenyou No. 1 · Super high-yield hybrid rice Chunyou 58
Introduction to early rice varieties
Tyou 15 (National Approval Rice 2007005) Full fertility The average period is 109.9 days. The plant height is 91.7 cm, there are 228,000 effective ears per 667 square meters, the ear length is 21.4 cm, the total number of grains per panicle is 120.6, the seed setting rate is 77.5%, and the thousand-grain weight is 24.4 grams. In the 2005 and 2006 regional trials, the output per 667 square meters was 486.28 kilograms. In the 2006 production test, the output was 421.24 kilograms per 667 square meters. It is suitable for field direct seeding, dry raising and seedling throwing, and conventional water raising seedling cultivation. The seed amount per 667 square meters of field is 2 kg to 2.5 kg. The variety has a late maturity period, average rice quality, and is highly susceptible to rice blast and bacterial blight. Zhuliangyou 173 (National Approval Rice No. 2010004) has an average growth period of 108 days. The plant height is 86.8 cm, there are 223,000 effective ears per 667 square meters, the ear length is 19.4 cm, the total number of grains per panicle is 104.9, the seed setting rate is 84.5%, and the thousand-grain weight is 27.9 grams. In the 2008 and 2009 regional trials, the output was 510.1 kilograms per 667 square meters. In the 2009 production test, the output was 477 kilograms per 667 square meters. Sow seeds at the right time. Dry-grown seedlings should be sown early. The amount of seeds used in every 667 square meters of field is about 2 kilograms. This variety has a moderate maturity period, is highly susceptible to rice blast, moderately susceptible to bacterial blight, highly susceptible to brown planthopper and white-backed planthopper, and has average rice quality. Lingliangyou 211 (National Approval Rice No. 2010003) has an average growth period of 109.8 days.
The plant height is 79.8 cm, there are 234,000 effective ears per 667 square meters, the ear length is 18.7 cm, the total number of grains per panicle is 105.8, the seed setting rate is 82.9%, and the thousand-grain weight is 26.3 grams. In the 2008 and 2009 regional trials, the output was 514 kilograms per 667 square meters. In the 2009 production test, the output was 484.1 kilograms per 667 square meters. Sow seeds at the right time and disinfect the seeds. The amount of seeds used per 667 square meters of field is 2 kg to 2.5 kg. This variety has a moderate maturity period, is highly susceptible to rice blast, moderately susceptible to bacterial blight, highly susceptible to brown planthopper and white-backed planthopper, and has better rice quality. Zhuliangyou 819 (Xiangshendao 2005010) has a full growth period of about 106 days. The plant height is about 82 cm, there are 236,000 effective ears per 667 square meters, the total number of grains per panicle is 109.6, the seed setting rate is 79.8%, and the thousand-grain weight is 24.7 grams. In the regional trials in 2003 and 2004, the output was 470.48 kilograms per 667 square meters. Dry-raised rice seedlings are sown on March 25, and water-raised rice seedlings are sown at the end of March. The seeding amount per 667 square meters is 2 kg to 2.5 kg in the field and 15 kg in the rice field. Adhere to strong chlorine essence soaking and timely application of pesticides to prevent and control diseases and insect pests such as stem borer, rice leaf roller, rice planthopper and sheath blight. Jinyou 899 (Xiangshendao 2004007) is suitable for early rice cultivation in southern Hunan where rice blast is less likely to occur. The total reproductive period is 113.1 days. The plant height is about 90 cm, there are 224,000 effective ears per 667 square meters, the total number of kernels per ear is about 120, the ear length is about 21 cm, the seed setting rate is about 80%, and the thousand-grain weight is 27 grams. In the regional trials in 2001 and 2002, the output was 490.39 kilograms per 667 square meters. Sow seeds from late March to early April. The amount of seed used per 667 square meters of field is 2 kg to 2.5 kg, and the amount of seed used per square meter of rice fields is 0.10 kg for dry rice and 0.03 kg for water-raised rice. Zhuliangyou 2008 (Xiangshendao 2011007) has a full growth period of 113.6 days. The plant height is 94.6 cm, there are 220,000 effective ears per 667 square meters, the total number of grains per panicle is 122.3, the seed setting rate is 79.7%, and the thousand-grain weight is 28.2 grams. Highly susceptible to rice blast. In the 2009 and 2010 regional trials, the output per 667 square meters was 521 kilograms. When sowing from the end of March to the beginning of April, the seed amount per 667 square meters is 2.5 kilograms in the field and 15 kilograms in the seedling field. The age of the seedlings should be controlled within 30 days. Pay attention to the prevention and control of diseases and insect pests such as rice blast, stem borer, and sheath blight. Lu Liangyou 996 (Xiangshendao 2005008) has a full growth period of about 112 days. The plant height is about 95 cm, with 210,000 effective ears per 667 square meters, a total number of grains per panicle of 113, a seed setting rate of 85%, and a thousand-grain weight of 28 grams. In the 2003 and 2004 regional trials, the output was 507.48 kilograms per 667 square meters. Sowing in central Hunan is around March 25. The amount of seeds per 667 square meters of field is 2 kg to 2.5 kg, and the age of the seedlings is controlled within one month. Pay attention to the timely prevention and control of rice blast, rice borer, rice leaf roller, and rice planthopper. Lingliangyou 104 (Xiangshendao 2011009) has a full growth period of 116 days. The plant height is 88.6 cm, and there are 228,000 effective ears per 667 square meters. Each ear has a total...
Can crop varieties approved at the national level be promoted nationwide
Each variety has its own suitable planting area. The following is a rice variety that has passed the national review. You can see the review opinion for recommendations on suitable planting areas.
ⅡYou 728
ⅡYou 728 (Red Good 166) Approval number: National Approval Rice 2006081
Breeding unit: Jiangsu Zhongjiang Seed Industry Co., Ltd. Co., Ltd. Hefei Fenghai Labeled Rice Research Institute
Parental source: II-32A×Suhui 728
Characteristics: This variety is an indica three-line hybrid rice. The average growth period of a mid-season rice in the middle and lower reaches of the Yangtze River is 137.3 days, which is 2.8 days later than the control Shanyou 63. The plant type is moderate, with luxuriant growth, strong stems, straight sword leaves, 169,000 effective panicles per acre, plant height 122.8 cm, panicle length 24.0 cm, total number of grains per panicle 161.6, seed setting rate 79.8%, and 1,000-grain weight 27.5 grams. Resistance: The average level of rice blast is 5.7, the highest level is 9, and the resistance frequency is 90%; the bacterial blight is level 5. Main indicators of rice quality: polished rice rate 66.5%, aspect ratio 2.6, chalky grain rate 36%, chalkiness 6.4%, gum consistency 78 mm, amylose content 23.4%.
Yield performance: In 2004, we participated in the regional trial of the late-maturing indica rice group in the middle and lower reaches of the Yangtze River. The average yield per mu was 592.88 kg, which was 5.18% higher than the control Shanyou 63 (extremely significant); in 2005, the trial was continued, and the average yield per mu was 592.88 kg. The yield was 574.07 kg, an increase of 7.28% compared to the control Shanyou 63 (extremely significant); the average yield per mu in the two-year regional trial was 583.47 kg, an increase of 6.20% compared to the control Shanyou 63. In the 2005 production trial, the average yield per mu was 529.48 kilograms, an increase of 4.63% compared to the control Shanyou 63.
Key points of cultivation technology: 1. Seedling cultivation: Sow early and at the right time according to the production season of medium indica rice in various places. The seeding rate per mu of rice field is 10 to 12 kilograms, and the age of the seedlings is about 30 days. 2. Transplanting: 15,000 to 18,000 holes per acre are planted in fields with medium and high fertility, and 1 to 2 grain seedlings are planted in each hole. The basic seedlings are controlled at about 50,000 seedlings per acre; fields with deviations in fertility are planted per acre. 18,000 to 20,000 holes, and 70,000 to 80,000 basic seedlings.
3. Fertilizer and water management: Generally, 15 kilograms of pure nitrogen are applied per acre, and the method of "pre-promotion, mid-control, and post-supplement" is adopted. Apply sufficient base fertilizer, apply tillering fertilizer early, increase phosphorus and potassium fertilizer, control the application of nitrogen fertilizer in the mid-term, and apply appropriate amounts in the later period. The ear fertilizer is mainly flower-preserving fertilizer. In terms of water management, shallow water should be irrigated frequently in the early stage to promote early emergence, and the seedlings should be placed in the field early to control vigorous growth. It is advisable to put them lightly in batches; water should be covered in time in the middle stage of ear differentiation, and dry and wet in the later stage. Irrigation should be stopped about a week before harvest. 4. Disease and insect pest control: Pay attention to the timely prevention and control of rice blast, rice thrips, rice planthoppers, stem borer, rice leaf roller and other pests and diseases. Approval opinion: This variety complies with the national rice variety approval standards and passed the approval. This variety has a moderate maturity period, high yield, moderate susceptibility to bacterial blight, high susceptibility to rice blast, and average rice quality. It is suitable for mid-season rice planting in the Yangtze River Basin rice areas of Jiangxi Province, Hunan Province, Hubei Province, Anhui Province, Zhejiang Province, and Jiangsu Province (except Wuling Mountain Area), as well as in the rice blast-prone areas of northern Fujian Province and southern Henan Province.
Source: Announcement of the Ministry of Agriculture of the People’s Republic of China (No. 794)
Note: Approved by the National Variety Approval Committee in 2006
Y two Characteristics of You 900
An indica two-line hybrid rice variety. For mid-season rice cultivation in the middle and lower reaches of the Yangtze River, the total growth period is 140.7 days, which is 2.7 days longer than the control Fengliangyou No. 4. The plant height is 119.7 cm, the ear length is 27.7 cm, the effective number of ears per mu is 149,000, the total number of grains per ear is 238.2, the seed setting rate is 78.3%, and the thousand-grain weight is 24.4 grams. Resistance: rice blast comprehensive index 5.1, highest ear blast loss rate level 9; bacterial blight level 5; brown planthopper level 9; medium heat resistance at heading stage; high susceptibility to rice blast, medium susceptibility to bacterial blight, Highly susceptible to brown planthoppers. Main indicators of rice quality: polished rice rate 68.1%, aspect ratio 3.0, chalky grain rate 12%, chalkiness 1.4%, gum consistency 68 mm, amylose content 14.7%.
The full growth period of hybrid rice Y Liangyou 483_Baidu Academic
Lu Liangyou 996, an indica two-line hybrid rice. This variety has a moderate maturity period, high yield, is susceptible to bacterial blight, is highly susceptible to rice blast, and has average rice quality. It is suitable for early rice planting in double-cropping rice areas with mild blast and bacterial blight in northern Fujian, Jiangxi, Hunan, and central and southern Zhejiang.
Chinese name
Lu Liangyou 996
Approval number
National approved rice 2006013
Breeding unit
Rice Science Research Institute of Hunan Agricultural University
Parental source
Lu 18S×996
Table of contents
1 Basic information
2Characteristics
3Yield performance
4Key points of cultivation technology
5Approval opinions
1 Basic information editor
Lu Liangyou 996
Approval number: National Approval Rice 2006013
Breeding unit: Rice Science Research Institute of Hunan Agricultural University
Hunan Yahua Seed Industry Science Research Institute
Parent source: Lu 18S×996
2 Characteristics Edit
This variety is an indica type. Hybrid rice. The average growth period of early rice cultivation in the middle and lower reaches of the Yangtze River is 109.7 days, which is 1.7 days earlier than that of Shijinyou 402. The plant type is moderate, the stems are strong, the number of effective panicles per acre is 196,000, the plant height is 95.1 cm, the panicle length is 20.0 cm, the total number of grains per panicle is 129.0, the seed setting rate is 82.0%, and the thousand-grain weight is 27.5 grams. Resistance: The average level of rice blast is 3.9, the highest level is 9, and the resistance frequency is 30%; the bacterial blight is level 7. Main indicators of rice quality: polished rice rate 42.3%, aspect ratio 2.8, chalky grain rate 91%, chalkiness 11.1%, gum consistency 55 mm, amylose content 24.2%.
3 Yield Performance Editor
In 2004, we participated in the regional trial of early indica and late maturing varieties in the middle and lower reaches of the Yangtze River. The average yield per mu was 520.51 kilograms, an increase of 7.17% compared to the control Jinyou 402 (extremely significant). ); the trial was continued in 2005, and the average yield per mu was 524.67 kilograms, an increase of 4.24% compared to the control Jinyou 402 (extremely significant); the average yield per mu of the two-year regional trial was 522.59 kilograms, an increase of 5.70% compared to the control Jinyou 402. In the 2005 production test, the average yield per mu was 557.60 kilograms, an increase of 7.34% compared to the control Jinyou 402.
4 Key Points of Cultivation Technology Editing
1. Seedling cultivation: sowing at the right time according to the early rice production season in various places. Generally, water-raised seedlings are sown at the end of March, and dry-raised seedlings are properly sown early. The seeding rate per mu of rice field is 8 Kilogram, the seed amount per mu of field is 2 to 2.5 kilograms. 2. Transplanting: Generally, dry-raised seedlings are transplanted with 3.1 to 4.1 leaves, and water-raised seedlings are transplanted with about 4.5 leaves (25 days old). The transplanting density is 16.5 cm × 20 cm or the throwing density is 20,000 holes per mu, each hole. Plant 2 grain seedlings, and plant (throw) 80,000 to 100,000 basic seedlings per acre. 3. Fertilizer and water management: Medium-fertility fields generally require 11 to 12 kilograms of pure nitrogen, 6 kilograms of phosphorus pentoxide, and 6 to 7 kilograms of potassium oxide per mu.
Apply sufficient base fertilizer, apply top dressing early, and apply ear fertilizer skillfully. When harrowing the field, apply 50 kilograms of 25% rice-specific compound fertilizer per mu. Combined with the application of herbicides 5 to 7 days after planting, apply 7.5 to 10 kilograms of urea per mu. , Apply 6 to 7 kilograms of potassium chloride per mu during the booting stage. During the tillering stage, dry and wet alternate to promote tillering. During the booting stage, it is mainly wet. Keep the water layer on the field surface. During the heading stage, keep shallow water in the field. During the filling stage, it is dry and wet. Do not cut off the water too early. 4. Prevention and control of diseases and pests: Insist on soaking seeds with strong chlorine essence to prevent the occurrence of seed-borne diseases such as bakanae disease, and timely prevent and control diseases and pests such as rice blast, bacterial blight, sheath blight, borers, and rice planthoppers during the growth period.
When peanut leaf spot occurs, spray 22 grams of 12.5% ??tebuconazole and 10 grams of 43% tebuconazole. Will there be premature aging in peanuts? Can I add pesticides to control vigorous growth?
Rice planthopper, rice leaf roller, commonly known as "explosion" and "fire breathing", rice blast is one of the three major diseases in rice production and is widely distributed in different areas. One of the countries in the rice growing region. Rice blast may occur throughout the rice growth period. According to the rice victims and different parts, it can be divided into seedling blast, leaf blast, node blast, panicle blast and grain high blast, especially large panicle blast relative to high-yielding rice. In recent years, due to the fact that most of the urban rice varieties do not have explosive resistance, some varieties of high-quality rice and japonica rice, highland rice are highly susceptible to rice blast; some nitrogen in some areas, long-term deep irrigation, is susceptible to childbirth, and the city is more With more rainfall and temperature, it is a good city where rice blast disease is on the rise. The booting and heading stages of rice in the city are critical periods when it is prone to ear neck blast. Coupled with frequent rainfall and suitable temperatures, it is very beneficial for its popularity around the world. Pay attention to the discovery and treatment, especially for rice fields where leaf blast occurs, and planting Susceptible varieties of rice area or old wards pay more attention, such as dark brown lesions or gray-green mold layers, panicle necks and spikelet branches, and should be sprayed immediately for control. Control methods: Spray 30 grams of 75% wettable powder tricyclic, or 100 ml of 40% rice blast EC, or 30% tebuconazole (Taifuli) SC 10- 15 ml, or 30 to 40 g of 25% tebuconazole (Aoning Tangsine) fungicide wettable powder, mixed with 50 kg of water spray or Polson Little Boy.
Rice smut disease, also known as green powder disease, commonly known as "high-yielding fruit", has occurred in recent years and is usually a common late stage rice disease. It mainly damages rice ears, and dark green or yellow dough is more serious. The disease not only affects the yield of rice, but also affects the pollution and human health. This disease is a typical climatic disease. Even in the case of rainy weather during the heading and flowering period of rice, the number of days above the second level will be conducive to its occurrence. Long-lasting rainy weather, excessive nitrogen fertilizer or peak fertilizer will further aggravate the incidence of the disease. Continuously cultivated land and japonica rice fields will have severe disease incidence, and the diseased ears will increase significantly after the onset and the grain will mature prematurely. The disease is milder in varieties. According to the meteorological department's forecast, the city's rainfall in July and August is very beneficial. All localities should attach great importance to prevention and control of the disease. Control methods: The key periods for spraying are the late booting stage (breaking period is 3-5 days), the mid-term resting period during the breakthrough of rice (about 50%), and then spraying once in rainy weather during the heading stage, and the control efficiency in the heading stage is very low. . This chemical substance can be used in 150-200 ml of 5% super Jinggangmycin polymer, or 75 ml of 20% triadimefon EC, or 100-150 g of 50% carbendazim wettable powder, or 25% 30-40g of tebuconazole, or 20-30g of 12.5% ??tebuconazole (Zhixinxing), mixed with 50kg of water for spraying
Rice sheath blight is a common disease. Rice cultivation reduces leaf sheath and leaf tissue necrosis, plants are susceptible to poor plant growth, and the emptying rate increases, which directly affects rice production. Its high temperature, high humidity, development and harm are very beneficial to the city's disease area in recent years. Expanding every year, the degree of damage increases year by year, but farmers are often ignored. According to recent surveys, the average disease cluster rate in Gushi County is 11.2%, the plant rate is 8.2%, and the disease cluster rate in severe cases is 23.6%. , the diseased plant rate is 14.7%; the average diseased field rate in Huangchuan County is 15.6%, the diseased cluster rate is 2.43%, and the plant rate is 2.1%; the average diseased cluster rate in Guangshan County is 21.2%, with the highest being 37%, and the average diseased plant rate is 9.56%. The average diseased field rate in Pingqiao District is 30%, and the diseased plant rate is 7.39%. The average diseased plant rate in Luoshan District is as high as 22.4%. The average diseased plant rate in Luoshan District is as high as 15.1%. In recent years, due to urban sheath blight reoccurrence year after year, there are a large number of bacterial sources on site; long-term deep water irrigation, in some areas, biased application of nitrogen fertilizer, fields covered by swamps, shaded rice growth, and rice varieties with high resistance to sheath blight due to lack of suitable rainfall. It is easy to cause the harm of sheath blight epidemic. All localities should strengthen publicity and guidance and actively mobilize farmers to carry out prevention. In particular, super rice should pay close attention to prevention and treatment to prevent lodging in the later stage.
Prevention indicators: Clusters. The incidence rate is 10%-15%.
Chemical control: 50 grams of 25% triadimefon wettable powder per mu or 150 grams of 5% Jinggangmycin, or 30 grams of 25% wettable powder Yingren Zhiluan (tebuconazole) ?40g or Zhixinxing 25-50g, or 30% discount (Tebuconazole) SC 10?15......