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Rice seedling-stage diseases require careful prevention and control, especially during periods of abnormal temperatures
Seedling-stage diseases are the general term for various physiological and infectious diseases during rice seedling raising, also called seedling rot. Physiological seedling rot refers to symptoms such as seed rot, bud rot, black root, greens wilt and yellow wilt death of seedlings caused by adverse environmental conditions; infectious seedling rot refers to seedling death symptoms caused by the harm of cottony leak and damping-off. During the seedling-raising period in northern rice regions, low temperatures and cold wave weather strikes are common, and the annual incidence rate of seedling rot disease is 10%~23%. Symptom characteristics 1. Physiological seedling rot: 1. Seed rot, refers to seeds rotting before germinating
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Is copper hydroxide effective for treating rice bacterial leaf streak?
How effective is copper hydroxide for treating rice bacterial leaf streak? How many applications are needed? Please answer objectively. Thank you for your question. The answer is as follows: Copper hydroxide can control rice bacterial leaf streak, bacterial leaf blight, rice blast, sheath blight and rice false smut, etc. Before or at the early stage of disease onset, spray with a 53.8% dry suspension concentrate at 900-1100 times dilution, with 2 consecutive applications.
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What are the control methods for the white-backed planthopper on rice?
Scientific name Sogatella furcifera (Horvath), belonging to the order Homoptera, family Delphacidae. Distributed in the water bamboo and rice-growing areas of China. Hosts include rice, water bamboo, corn, barley, wheat, sugarcane, sorghum, barnyardgrass, bluegrass, and others. Damage characteristics are the same as those of the brown planthopper. Morphological features: macropterous male body length 3.2-3.8 mm, light yellow, with dark brown spots. Vertex projecting forward; on the outer side of the lateral carinae of the pronotum and mesonotum, behind the compound eyes, there is 1 crescent-shaped dark brown spot; the lateral area of the mesonotum is dark brown
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Ken 12 (formerly coded wd06) (rice)
Breeding institution: Hebei Rice Research Institute. Approval status: approved by the Hebei Provincial Crop Variety Approval Committee in 1997, and by the National Crop Variety Approval Committee in 1999. Variety approval number: Guoshen Dao 990004. Variety source: Jigeng 8 / Zhonghua 8 // Guandong 100. Characteristics: ideal plant type, plant height 100-120 cm, thick and tough stems, green and upright leaves, good light-receiving posture, high light energy utilization rate, panicle length 16-18 cm,
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Detailed Explanation of Key Points for Artificial Cultivation Techniques of Chinese Licorice
Licorice, also known as sweet root and dense grass, has 23 varieties worldwide. China is the country with the most licorice distribution, with 12 varieties. Ural licorice (i.e., Chinese licorice) is the most widely distributed, highest-yielding and best-quality licorice species among the six licorice species listed in the pharmacopoeia of China, and has long enjoyed a high reputation in the international market. Licorice is a perennial herbaceous plant of the Fabaceae family, and its roots and rhizomes have the effects in traditional Chinese medicine of harmonizing various medicines and neutralizing a hundred toxins. China has the sayings "nine out of ten prescriptions contain licorice" and "no prescription is complete without licorice," so it is called the king of Chinese herbal medicines. Licorice
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Key Technical Points for Winter Potato Cultivation with No-Till or Minimum-Till Rice Straw Mulching
I. No-till or minimum-till field preparation. 1. Selection of no-till or minimum-till fields. No-till or minimum-till potato cultivation is best carried out in sandy loam fields with convenient drainage and irrigation, loose soil, a pH value of 5.5-6, and good water and fertilizer retention. It is especially suitable for planting in sandy loam paddy fields with good drainage and irrigation conditions during the winter fallow period in our city. Fields prone to drought and water shortage and shallow, poor fields, heavy clay fields, low-lying fields, mountain pit fields, cold waterlogged fields, and rotten
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Key Cultivation Techniques for Machine-Transplanted Rice at the Transplanting Stage
I. Make a Good Start and Manage the Seedling Nursery Well 1. Apply the "standing-up fertilizer" according to seedling appearance. This is generally done 3-4 days before transplanting; the amount and method of application should depend on seedling color. For weak seedlings with faded leaf color, use 4-4.5 kg of urea per mu diluted in 200 kg of water, and spray or splash evenly in the evening; after application, sprinkle clean water once to prevent fertilizer burn to the seedlings. For seedlings with normal leaf color and upright leaves that do not droop, use 1-1.5 kg of urea per mu diluted in 60-70 kg of water for foliar spraying. For seedlings with dark green leaves and drooping leaves, do not apply fertilizer at all; water control measures should be taken to improve seedling quality.
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What are the advanced methods for transplanting rice seedlings?
1. Improved intensive cultivation: transplant young seedlings at the 3-leaf to 4-leaf 1-heart stage early. Fields with good water sources should be planted early; fields with poor water sources can be planted slightly later. Both dry-raised and water-raised seedlings are suitable, but sufficient base fertilizer should be applied, the field should be deeply plowed and harrowed level, strong seedlings should be selected as much as possible, and transplanting should be done in shallow water; both the row spacing and hill spacing are 1 chi 3 cun, with three single plants per hill spaced 3 cun apart in a triangular arrangement. This transplanting method has density within sparseness and sparseness within density, minimizing competition among plants for nutrients and sunlight to the greatest extent, which benefits individual plant development and can therefore increase yield considerably. It is the most advocated
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How effective is the Jiaduo frequency-vibration insect-killing lamp at trapping and killing the rice stem borer?
The rice stem borer is one of the important pests in rice production in Wuchang City. In recent years, with changes in rice varieties and warming climate conditions in our city, the occurrence and damage of the rice stem borer have become increasingly serious. According to this autumn's survey, for certain varieties in Wuchang, the average number of insects per 100 steps per mu reached more than 20,000, with the highest in key outbreak areas reaching 60,000, and in some cases more than 100,000. Such insect numbers are rare in history, whether domestically or abroad. In order to further control the damage of the rice stem borer, explore new approaches to its control, and reduce pesticide pollution of rice. This year our city set up at Sun Guanghao's field in Lianhua Village, Wuchang Town
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New rice varieties hit the market: Jiangsu Mingtian Seed Industry launches new varieties
Nanjing 44, formerly known as "Ning 4009", is an early-maturing late japonica rice variety systematically bred from Nanjing 38 by the Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, and was developed in 2004. It is suitable for planting under medium-to-high fertility conditions in the areas along the Yangtze River and southern Jiangsu. From 2005 to 2006, it participated in the Jiangsu provincial regional trial. The two-year average yield per mu was 588.1 kg, and the 2006 production trial average yield per mu was 621.9 kg, an increase of 7.1% over the control. The number of effective panicles per mu is about 190,000, the number of filled grains per panicle is about 130, the seed-setting rate is
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