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What are the agricultural control measures for rice pests?
In recent years, as the severity of rice pest outbreaks has continued to increase, the use of some highly toxic pesticides with large residual amounts on rice has also gradually increased, which has brought hidden dangers to rice safety. In response to this situation, starting in 2004, the author purposefully carried out agricultural control research in demonstration areas. Through two years of practice, the results showed that: agricultural measures applied to rice pest control have unique and superior effects compared with chemical pesticide control, biological control and physical-mechanical control, and have played a positive role in improving the control
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Which varieties can be used for controlling the rice stem borer (Chilo suppressalis)?
(1) Fipronil. The recommended dose is 1.5-2.5 g active ingredient per mu. The key application points are: spray at the peak hatching stage of the rice stem borer eggs; the field may be kept with or without a water layer. Because fipronil is highly toxic to bees and aquatic organisms, and especially highly toxic to shrimp and crabs, do not use it in bee-keeping areas or shrimp and crab farming areas. If it must be used, it is recommended to drain the field water before application. After a rice field has been treated with fipronil, do not discharge the field water into fish ponds or rivers and ditches. (2) Fipronil + trichlorfon
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What are the control measures for rice bakanae disease?
Currently, the method used in production to control rice bakanae disease is seed soaking with chemicals. The main chemical varieties used include "901", Emiaoling, Yijinling, prochloraz, etc. Some fungicides have been used in our province for more than ten years. Long-term single use of one fungicide will cause the pathogen to develop resistance, thereby affecting the fungicidal effect. During seed soaking, it is generally also required to stir once or twice a day. On-site investigation shows that all these chemicals are available, but the specific operations differ, and the control effects among different chemicals also differ significantly. Low temperature and seed handling
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How to prevent and control rice red blight? These 4 methods work fast
After good early growth, rice enters the reproductive growth stage of the middle and late periods. Strengthening field management at this stage has a great relationship with the yield and quality of rice. So, how can field management in the middle and late stages of rice growth be done well? 1. Timely field drying. Field drying should generally be carried out when rice is not sensitive to water reaction, that is, it is more suitable from the late tillering stage to the early young panicle differentiation stage. The following principles should be followed during operation: fields with sufficient and vigorous seedlings should be dried appropriately earlier; where the mud foot is deep and there is excessive growth, drying should be heavier, otherwise lighter; fields with poor water retention should not be dried heavily; saline-alkali paddy fields generally cannot be dried.
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Which varieties can be used to control the white-backed planthopper in rice?
To control the white-backed planthopper in rice, the varieties that can be used are: (1) Buprofezin. The recommended dosage is 7.5-12.5 grams of active ingredient per mu. The key application technique is: spray at the early outbreak stage of the brown planthopper, and it is best to maintain a water layer in the field when applying. (2) Imidacloprid. The recommended dosage is 1-2 grams of active ingredient per mu. The key application technique is: spray at the early outbreak stage of the brown planthopper.
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Hualiangyou 1206 Rice Variety Introduction
Hualiangyou 1206 Variety source: A two-line hybrid mid-season rice variety bred by Huazhong Agricultural University using "Hua 201S" as the female parent and "T226" as the male parent. It was approved by the Hubei Provincial Crop Variety Approval Committee in 2005, with the variety approval number E Shen Dao 2005003. Quality and yield: From 2003 to 2004, it participated in the Hubei Province mid-season rice variety regional trial. The rice quality was tested by the Food Quality Supervision and Testing Center of the Ministry of Agriculture, with a brown rice rate of 81.4%, head rice rate of 58.8%,
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Introduction to the Characteristics of the Rice Variety Huahang 1
Variety Introduction: Huahang 1 is a new high-quality, high-yield rice variety bred by the Department of Agronomy at South China Agricultural University. Rice seeds were carried aboard a Chinese recoverable satellite for 15 days of space flight and then sown on the ground, and the variety was selected from several hundred mutant single plants grown on the ground. This variety has the following characteristics: 1. Excellent grain quality; the grains are transparent with no white belly, and the length-to-width ratio is 3.3-3.5. According to the appraisal by the Guangdong Provincial Grain and Oil Quality Inspection Station, the early rice belongs to the first-grade rice class. 2. Good yielding performance. Large panicles with many grains and a high seed-setting rate; the average total number of grains per panicle is about 209, and the number of filled grains is about 196,
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Detailed Introduction to the Rice Variety Huayu 560
Characteristics: This variety is a japonica conventional rice variety. When planted in southern Liaoning, southern Xinjiang, and the Beijing-Tianjin region, its full growth period is 160.1 days, 3.6 days later maturing than the control Jinzhu 1. Plant height is 97.4 cm, total grains per panicle is 104.8, seed setting rate is 90.8%, and 1000-grain weight is 27.1 g. Rice blast resistance is grade 3. Main rice quality indicators: head rice rate 69.4%, chalky grain rate 17%, chalkiness degree 1.7%, gel consistency 82 mm, and amylose content 16.6%. Yield performance: In 2002, it participated in the northern
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Application of Anther Culture Technology in Rice Breeding
Using disease-resistant plants from the first backcross generation for anther culture can transfer disease-resistance genes into japonica rice in a short time, accelerating the process of disease-resistant breeding in japonica rice. Zhejiang Agricultural University began making crosses in 1975. An anther culture was carried out in 1976, and by 1977 stable varieties resistant to rice blast and bacterial leaf blight, such as Dan 209, had been developed. The whole process took only 3 years, and resistance genes for two diseases were transferred at the same time; its breeding speed and efficiency greatly exceeded the conventional research methods of Japanese scholars. This study also explored the approach of applying the anther culture method in seed production to produce foundation seed. Tests showed that pure lines from anther culture had a certain effect of purification and rejuvenation compared with foundation seed produced by the "three-plot method." Anther-cultured disease-resistant varieties have now been used as resistance sources for late japonica rice.
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Detailed Introduction to the Rice Variety Huhong Zao No. 1
Breeding institution: Rice and Sorghum Research Institute, Sichuan Academy of Agricultural Sciences. Approval status: approved by the Sichuan Provincial Crop Variety Approval Committee in 1986, by the Hunan Provincial Crop Variety Approval Committee in 1988, and by the National Crop Variety Approval Committee in 1991. Variety registration number: GS01018-l990. Variety source: 1277/Red 410. Characteristics: an early indica medium-maturity variety. Strong growth at the seedling stage, medium tillering, dark green leaf color, plant height about 75 cm
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