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Occurrence of Pests and Diseases in Rice Seedbeds and Current Control Methods
During the rice seedbed stage, aphids, thrips, and damping-off disease mainly occur, harming the growth of rice seedlings. Adult and nymph rice thrips often gather at the leaf auricle, ligule, and inside the central leaf to cause damage; the affected parts first show small yellow-white spots, after which mottled white patches appear on the leaf surface. Affected seedlings recover green slowly, become stunted and fail to grow, appearing as if "stuck in the clump." Damping-off disease mostly occurs in wet (semi-dry) seedling nurseries and dry seedling nurseries, causing seedling death. Because temperatures in early to mid-April are unstable, aphids, thrips, and damping-off disease are prone to occur, affecting full, uniform, and strong seedlings. Agricultural technology centers of all townships and subdistrict offices are requested to strengthen water
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Which rice fungicide is good? Recommendations for low-cost, high-efficiency pesticides
Spend 20 yuan, get back 50 yuan. Would you take such a good deal? Last year, large grain growers in Shaoxing, Anji and other places tasted this sweet success after using "Aimiao" when growing rice, with rice yields generally increasing by about 10%. Right now is the pesticide application season for early rice, and they are busy selecting this high-return new pesticide to apply to rice. It is understood that 30% Aimiao emulsifiable concentrate is a new type of fungicide launched by Syngenta Crop Protection of Switzerland that can both prevent and control rice diseases and regulate rice growth. This pesticide works against rice sheath
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A Detailed Explanation of the Effects of Low-Temperature Cold Damage on Rice and Defensive Measures
Rice cold damage refers to the disaster in which rice is affected by low temperatures below the minimum critical temperature for growth, resulting in the inability of rice to grow and develop normally and thus causing reduced yields. Depending on the period of damage, it can be divided into delayed-type cold damage, sterility-type cold damage, and mixed-type cold damage. I. Types and Characteristics of Rice Cold Damage 1. Delayed-type cold damage: During the vegetative growth period of rice, and sometimes also during the reproductive growth period, the plant is harmed by relatively low temperatures over a longer period, which weakens the physiological activity of the rice plant, delays its development, postpones heading and flowering, and prevents full grain filling and
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Detailed Introduction to the Ejingnuo No. 6 Rice Variety
Breeding unit: Jingzhou Prefecture Institute of Agricultural Sciences, Hubei Province. Approval status: Approved by the Crop Variety Approval Committees of Hubei Province, Henan Province, Sichuan Province, and Hunan Province; approved by the National Crop Variety Approval Committee in 1991. Variety registration number: GS01002-1990. Variety source: Guichao No. 2 treated by radiation. Characteristics: Plant height about 110 cm, plant type moderately loose, upper leaves narrow, long and erect, moderate tillering ability, uniform heading. Effective panicles per mu 250,000, filled grains per panicle 90, seed setting rate about 80%. Grain is long-shaped; glume and sterile lemma are golden yellow; the tip of the glume is colorless, occasionally with awn; 1000-grain weight 26 g, milling yield 78.7%, head rice rate 61%, amylose content 1.1%, protein content 8.2%. Yield per mu is slightly lower than that of Guichao No. 2, but the glutinous quality is excellent. Resistant to bacterial leaf blight and rice blast, tolerant to sheath blight. General yield 450 kg per mu.
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Licorice Pest Control Methods and Technical Key Points
(1) Leafhoppers: mainly the elm leafhopper, the small green leafhopper, etc. They occur throughout the entire growing period of licorice, with the most severe damage from late June to mid-August. Nymphs or adults suck the sap of licorice leaves, buds, young branches and young shoots, first showing silvery-white dot-like spots, then the leaves lose chlorophyll and turn pale yellow, and finally fall off. Control methods: Clear the elm trees and other overwintering hosts of leafhoppers around the licorice field. At the peak of infestation, spray with 2.5% deltamethrin at 1000-1500 times dilution. Use natural enemies such as cotton aphid parasites and ladybugs
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How to Prevent Cold Damage in Rice? Detailed Explanation of Fertilization Measures
Fertilization case: In 2006, in rice-growing areas such as Shangzhi City, Heilongjiang Province, during the early stage of rice growth, some rice seedlings encountered low-temperature weather below 17°C, and rice cold damage problems of varying degrees occurred. In the rice-growing areas of Ningxia and Zhangjiakou, Hebei in the northwest region, in autumn during the late stage of rice growth, just at the grain-filling stage, the temperature suddenly dropped below 20°C, causing rice to suffer cold damage, which was very unfavorable for grain filling, and the seed-setting rate decreased by 10-20%, with severe cases decreasing by more than 50%. Expert comments: In northern rice-growing areas, in order to defend against the cold damage problems brought to rice production by low-temperature weather
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How to prevent empty and blighted rice grains? Master these technical measures
Empty and blighted rice grains refer to unfertilized empty grains and half-empty grains that fail to develop after fertilization, and this has a great impact on rice yield. Therefore, in rice production, in addition to striving for more panicles and larger panicles, it is also necessary to reduce empty and blighted grains, improve the seed-setting rate, and increase the 1000-grain weight in order to obtain high yields. At present, rice is in the grain-filling and ripening stage. To prevent the occurrence of empty and blighted rice grains and achieve the goal of high yield, comprehensive preventive measures must be taken. The specific measures are as follows: 1. Select varieties with good seed setting. Rice varieties differ in physiological morphology, and the seed-setting rate varies greatly.
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16% Exianqing is the first choice for controlling rice "small panicle head"
For many years, in some major rice-producing areas such as Jiangsu, the phenomenon of "small panicle head" (also called small-grain distorted panicle) has appeared continuously over many years under multiple varieties, multiple planting levels, and multiple ecological conditions in large-scale production. Its characteristics are: small panicles, small glumes, cracking of the inner and outer husks after grain filling, partial exposure of rice grains, and small grains with dark brown color. It is especially severe in the Lixiahe area, coastal areas, along the Huai River, along the Yangtze River, and hilly areas of Jiangsu Province. It is estimated that in recent years the affected area in Jiangsu Province alone has been about 100,000 hectares each year, reducing rice output by more than 100 million kg, and cumulatively causing about 500 million kg of rice yield loss.
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Detailed introduction to the rice variety B You 827
Variety source: developed by the Rice Research Institute of Southwest University of Science and Technology and the Rice Research Institute of Sichuan Agricultural University by crossing the male sterile line 803A with Shuhui 527. Characteristics: the whole growth period is 150.3 days, 0.8 days shorter than the control Shanyou 63; the plant type is compact, the tillering ability is relatively strong, and the color turns well in the later stage. Plant height is 118.9 cm, panicle length 26.3 cm, average grains per panicle 161.5, seed setting rate 82.2%, and 1000-grain weight 28.44 g. Quality testing shows that 9 indicators reach the Ministry-issued second-class fine rice standard. Resistance to rice blast: leaf blast grade 1-6, neck blast
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How is the D You 362 rice variety?
(1) Variety source: This variety was developed by the Rice Research Institute of Sichuan Agricultural University by crossing D Shan A with Shuhui 362. (2) Variety characteristics: This combination has a total growth period of about 150 days, 2-3 days longer than the control Shanzhai 8. Plant height is 87.8 cm, average grains per panicle is 152, seed-setting rate is 81.8%, 1000-grain weight is 26.2 g, brown rice rate is 82.5%, milled rice rate is 71.4%. Processing and appearance quality are superior to the control. Resistance identification (leaf blast grade 3-5, neck blast grade 3-7) shows relatively strong rice blast resistance. This combination has vigorous growth, strong tillering ability, and is suitable
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