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What pesticide gives the best control effect against older larvae of the rice leaf roller?
Chlorpyrifos and abamectin-monosultap are effective agents for controlling the rice leaf roller, but they must be applied during the 1st-2nd instar young larval stage (at this stage the rice leaf roller has not yet rolled leaves and caused damage, or has just begun rolling the leaf tips and causing damage), when the rice in the field has just begun to roll leaves. For rice leaf roller larvae of the 3rd instar and above, on the one hand they are protected because they are wrapped inside the rice leaves, and on the other hand they are insensitive to nereistoxin-type pesticides such as monosultap and to organophosphorus pesticides such as chlorpyrifos, methamidophos and monocrotophos, so the control effect after spraying is poor. Relatively speaking, older rice leaf
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Introduction to the Jiudao 22 rice variety (formerly known as Jiu 9432)
Breeding institution: Jilin City Academy of Agricultural Sciences, Jilin Province, China. Variety source: Shonai 324 / Fujikei 138. Review opinion of the National Variety Approval Committee: This variety is a conventional japonica rice variety. When planted in Jilin Province, its whole growth period is about 153 days, similar to "Qiuguang". It shows high and stable yield, moderate resistance to rice blast, and medium grain quality. It is suitable for planting in rice regions of northern China with a maturity period similar to "Qiuguang". Upon review, it meets the national variety approval standards and has been approved.
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How is the Fu'er Daohebao rice product?
Fu'er Daohebao brand rice seedling-strengthening nutrient agent is a "four-in-one" ultra-efficient seedbed nutrient substrate jointly developed by the Fu'er Group and the Chinese Academy of Agricultural Sciences, including a fertilizer enhancer, an acid regulator, a soil conditioner, and a mother agent. This product is suitable for rice seedling-raising areas in the cold regions of the north (except for saline-alkali land seedling-raising areas). A single application can provide the required nutrients, and it has effects such as seedbed soil disinfection, acid regulation, biochemical control, and root promotion. It can achieve the "one controls three" effect of enhancing stress resistance (disease resistance, cold resistance, low-temperature resistance), cultivating strong seedlings, and improving yield and quality. 1. Rake
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Detailed Explanation of Rice-Fish-Loach Ecological Agriculture Engineering Technology
1. Environmental conditions of the production area: a good ecological environment, far from pollution sources, good air; high, thick and compact paddy field ridges, relatively clayey soil, relatively high soil fertility, and paddy fields with sustainable development capacity; good irrigation and drainage conditions, relatively sufficient water sources, and fresh water quality. 2. Paddy field engineering facilities: dig a ring-shaped ditch around the paddy field, with a ditch width of 1 m and a depth of 0.5 m; surround the field ridges with anti-escape plastic sheeting (40-50 cm above ground, buried 20-30 cm underground); install double-layer anti-escape blocking nets at the water inlet and outlet. 3. Rice, river crab,
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New japonica rice variety Zhengdao 18 passes national approval, combining high yield, disease resistance and good quality
Zhengdao 18 is a new japonica rice variety with high yield, disease resistance and wide adaptability, bred by the Grain Crops Research Institute of the Henan Academy of Agricultural Sciences. In 2005, plant variety right protection was applied for, with announcement number CNA002221E. In 2006, it passed provincial approval in Henan, and in August 2007 it passed national approval. I. Characteristics: The whole growth period is about 152 days, the plant type is compact, the plant height is 95 cm, growth is vigorous, tillering ability is strong, the effective panicle rate is high, the stems are thick, the leaf color is green, the flag leaf is short and held upright, and the leaf sheath is green; the panicle length is 16 cm, the grains are densely set
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Introduction to the Jiudao 27 Rice Variety and Its Characteristics
Jiudao 27 was bred by the Rice Research Institute of the Jilin City Academy of Agricultural Sciences. Plant height is 105 cm, tillering ability is above average, each panicle averages around 100 grains, the seed-setting rate is above 90.0%, and the 1000-grain weight is 26 g. It is moderately susceptible to leaf blast and panicle blast, but is resistant to lodging and has good palatability. The usual yield is 600-667 kg/667 sq m, and the full growth period is 141 days. It is suitable for planting in the mid-to-late maturing rice areas of Jilin Province with an active accumulated temperature of 2800°C. Wuyoudao 1 was introduced from Heilongjiang Province by the Jilin Province Seed Station and other units. The full growth period is about 138 days, plant height is 97 cm, and each panicle averages
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Detailed Explanation of the Characteristics and Main Cultivation Techniques of Brazilian Upland Rice
Brazilian upland rice LAPAR-9 is one of a batch of improved crop varieties that the Brazilian government presented to our country in 1992 during Premier Li Peng's attendance at the United Nations Conference on Environment and Development. Since 1993, our institute has planted it successively on hillside land, water-deficient fields, orchards and tea gardens in Beijing, Tianjin, Hebei, Shandong, Henan, Anhui, Chongqing, Sichuan, Shaanxi, Shanxi, Zhejiang and **, with an average yield of 200-300 kg per mu; on plots with good fertilizer and water conditions, the yield can reach 400 kg per mu, and at its highest more than 500 kg per mu. Trial
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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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