When planting rice, why does the rice field need to be watered at the right time?

When planting rice, why does the rice field need to release water at the right time?

Rice is an aquatic plant and can only grow well when there is water. Especially the tillering stage of rice requires a lot of water to grow well. Only when there is water can the effect of fertilization and pesticide application be ensured, so as to achieve high yield. If rice is grown in Han Dynasty, one seed can only bear one or two small ears of rice. Under suitable water conditions, one seed can bear 4 to 6 large ears of rice, fertilizer and water, etc., or even more than 20. With large rice ears, the yield of rice grown with or without water can be imagined. How many days does it take to plant rice?

Different varieties of rice have different planting cycles.

Generally, the growth cycle of early rice is about 90 days, and the growth cycle of late rice is about 110 days.

Rice is grown in different places, and its growth cycle is also different. Rice planting: why it is not advisable to transplant rice seedlings deeply

The depth of rice seedling transplantation has a great impact on the greening, tillering and preservation of seedlings.

When the rice transplanting depth exceeds 3 cm, the greening and tillering of the seedlings will be inhibited, especially the tillering at the lower nodes is significantly inhibited, the number of late tillers at the higher nodes increases, the tillering is delayed, the tillering quality is poor, and weak seedlings are transplanted. If it gets too deep, it will turn into stiff seedlings. Therefore, it is not suitable to plant seedlings deeply.

Generally, when the transplanting depth is 0.5 cm, the seedlings are easy to scatter, and there are more seedlings falling and drifting. When the rice is mechanically transplanted to a depth of about 2 centimeters, there will be no phenomenon of falling seedlings or floating seedlings. The plants will have more roots, grow robustly, and have strong tillering ability. Therefore, the depth of mechanical rice transplanting should be controlled at about 2 cm. The artificial transplanting depth is 1 to 1.5 centimeters; the surface of the pot for planting is level with the mud surface; it is appropriate to insert 2/3 of the surface of the pot for throwing into the soil (for throwing in mud). Rice planting time in Jining, Shandong

Many places have started planting now, and some with little land may have finished planting! Rice cultivation

I checked the literature and found no such reports.

From a theoretical analysis, there will be no difference, because the same land conditions belong to the same groundwater system, that is to say, both well water and river water come from the same circulating water system. Since the source is the same, there must be no difference in the rice irrigated with this water.

Haha~ This question is relatively...

It’s hard to say~

Haha, usually we calculate the length of the seedling period. transplant. Moreover, early rice and late rice transplanting have different requirements for seedlings.

It is rare to count how many leaves produce millet

Morphological characteristics, diagnostic indicators and seedling management at each growth stage of rice

(1 ) Seedling stage 1. The seedlings look appropriate, have neat leaves, strong seedlings, tall leaves, well-developed roots, and strong resistance to plant damage after transplanting. 2． Diagnostic indicators (1) Full seedlings: The leaf area coefficient per mu of seedling field when transplanted is about 3.0 to 3.5; the total number of large seedlings per mu is 100 to 1.2 million, medium seedlings is 150 to 2 million, and small seedlings is 250 to 250. 3 million, and the total number of hybrid rice seedlings per mu in a single season is about 500,000 to 750,000; the leaf ages are uniform, with medium seedlings ranging from 6.1 to 7.0, large seedlings ranging from 8.1 to 9.0, and small seedlings from 8.1 to 9.0. The leaf age of soilless seedlings is 3.0. (2) The rooting ability is strong, the root system of a single plant is developed, and there are many white roots. The tree will turn green and live 2 to 4 days after planting. The standard of a live tree is when the tips of the heart leaves spit out water in the morning. (3) The seedlings have strong resistance to plant damage. The leaves of medium-sized seedlings are green and not droopy, and the carbon-nitrogen ratio is 10 to 13. They are called strong; the large seedlings are light green in color, the leaves are hard and straight, and the carbon-nitrogen ratio is more than 15, and they are called old and strong. The young seedlings have bright green leaves and slightly curved leaves, which are called tender and strong seedlings. (4) The base of the seedlings is thick, with a thickness of 0.5 to 0.7 cm; the tillering rate is more than 95% of large seedlings, about 50% of medium seedlings, and about 30% of small seedlings. 3． Illustration of seedling management (1) The selected seeds should be fully mature, pure, large, plump, with high germination rate and strong germination potential. (2) Seed soaking and germination meet the temperature, moisture and air required for seed germination, so that the seeds germinate quickly and neatly, and the roots and buds are strong, so that they can take root quickly after sowing and grow strong seedlings. (3) Sowing at the right time and raising seedlings in the open field too early are prone to low temperature hazards, slow growth, and rotten seedlings and dead seedlings. (4) The amount of sowing is suitable. If sowing is too dense, the rooting is poor, the light is insufficient, the seedlings will be slender and yellow; if the sowing is appropriate, the seedlings will be strong. (5) Moisturize the roots and water the ditch after sowing to keep the seedling board moist, so that the roots will take root quickly and stand upright. If the seedlings are early, the root buds will grow strong and the seedling rate is high. After sowing in deep water, only the buds will take root, which can easily cause bud drop and floating seedlings. If the temperature is low, it will also cause rotten seedlings and dead seedlings. Drain and dry. (6) Apply weaning fertilizer early to seedlings at the three-leaf stage. All the nutrients in the endosperm have been exhausted. Its growth relies on its own root system to absorb water and nutrients, produce organic matter, and live independently. Topdressing should be done early, usually when one leaf is in the center. (7) Prevent dead seedlings. When the seedlings are in the three-leaf stage, they have the weakest resistance to stress. When encountering low temperatures of 5 to 7°C, indica rice will suffer cold damage. When raising seedlings with heat preservation or dry cultivation, when the seedlings have 2 to 3 leaves, due to the invasion of pathogens, When the temperature changes from rainy to sunny days, green or yellow dead seedlings often appear. (2) Tillering stage 1. Growth and appearance: The living tree will turn green 3 to 5 days after transplanting, and the leaves will gradually turn from light green to green, and start to tiller in 7 to 10 days. The leaves are not drooping, and the plant shape is loose and stocky.

2． Diagnostic indicators (1) Tillering: Tillering begins about 7 days after planting (i.e., n leaves are transplanted, and n+2 leaves produce synextension points when the tips are exposed). At the end of the effective tillering stage (i.e., leaf age is equal to total leaf age minus aboveground elongation) When internodes are counted) the total number of tillers reaches the number of ears per acre (generally it should be about 10% more than the number of ears and should not be less than the number of suitable ears); when the number of tillers reaches its peak, the number of total tillers per acre generally reaches the number of suitable ears per acre. One and a half times the number or (1/3) exceeding the appropriate number of ears. (2) Leaf area coefficient: 2.0 at the beginning of tillering, 3 to 3.5 at the peak of tillering, and 3.5 to 4.0 at the peak of tillering. (3) Leaf color: After turning green, the leaf color changes from light green to green. The leaf color of the functional leaves (top 3 leaves) is darker than the leaf sheath color. The top 4 leaves are darker than the top 3 leaves. The leaves are curved. The length of the leaves is the same as the distance between the leaves and the ears. Gradually increasing, the tillers diverge, the angle is larger, the plant shape is loose, the ineffective tillering stage reaches the end of the tillering stage, the leaf color turns from green to light green, the leaf color of the top 4 leaves and the top 3 leaves is close to or slightly lighter than the sheath color, and the leaves gradually become straighter , the number of green leaves on the main stem is 5 or more for varieties with short growth period, and 6 or more for varieties with long growth period. (4) Roots: The root system is developed, the roots are white with root hairs, the base of the roots is orange-yellow, and there are no black roots. 5． Illustration of seedling management: (1) Strong seedlings in the tillering stage (2) Effects of different planting methods of shallow and deep seedlings on the green and viable trees (3) Weak seedlings in the tillering stage (3) Long panicle stage 1. The high-yield plant has 4 to 5 green leaves, the leaves are green, the leaves are straight and not draped, the internodes are thick and short, elastic, and the base is refreshing. 2. Diagnostic indicators (1) Tillers: During the differentiation of young panicles, the total number of tillers per mu is stable at about 1.5 times the appropriate number of panicles; during the booting stage, the total number of tillers per mu is slightly greater than the suitable number of panicles. (2) Leaf area coefficient: It is about 4 at the young panicle differentiation stage, about 6 at the second leaf stage, and 7 at the booting stage (dwarf stalks and tall leaves; it can be larger when the climate is sunny and the humidity is low, and smaller when the humidity is low). (3) Leaf color: light green before and after jointing. The whole field is light green when viewed from a distance and green when viewed up close. It turns green during the booting stage (meiosis stage) and fades slightly when heading. The number of green leaves is more than 4 for early rice, and more than 4 for medium and medium-sized rice. There are 5 late rice leaves, 3 inverted, 2 inverted, and sword leaves. The length of the leaves gradually decreases from long to short, and they are thick and straight. (4) Root: The root tip is white, with many branches, strong elasticity, no or very few black roots, and the surface root (floating root) system is developed, and the root system extends to the depth. 3． Illustration of seedling management (1) Strong seedlings in the jointing stage (4) Fruiting stage 1. High yield, uniform heading appearance, many green leaves, slow leaf aging, green stalks with yellow seeds, and few empty grains. 2． Diagnostic indicators (1) Leaf area coefficient: The leaf area coefficient from heading to grain filling is about 3 to 3.5. (2) Leaf color and number of green leaves: After heading, it turns green slightly, but it is lighter than the leaf color at the booting stage. The leaves fade slowly. The number of green leaves per acre of tillers at heading is 4 for early rice and 4 to 5 for middle and late rice. about 15 to 20 days after heading, at the maturity stage, there will be more than 3 green leaves for early rice and more than 4 for middle and late rice; when mature, early rice will have 1.5 green leaves, and middle and late rice will have 2.5 green leaves. (3) Root: The root end is white, with very few black roots and rotten roots. There are still a few branched roots growing until the wax maturity stage. (4) The maturity standard is when more than 90-95% of the grain husks (90% for early rice and more than 95% for middle and late rice) are yellow. 3. Illustration of seedling management (1) Heading and flowering and flower structure. When heading and flowering, shallow water should be irrigated frequently, granular fertilizer should be applied skillfully, and diseases and pests should be prevented. Adjust the sowing period so that the late-season rice can be fully eared before the daily average temperature is above 22°C. At this time, if there is a lack of fertilizer, drought, or the temperature is too low or too high, it will cause difficulties in earing, poor pollination, increased infertility rates, and empty grains. rate increased. (2) Normally mature rice plants should be properly managed in the early and middle stages, properly fertilized in the later period, have neat heading, fast grain filling, and high seed setting rate. When mature, intermittent irrigation is used to nourish roots and preserve leaves. The stalks will be green and yellow, increase grain weight, and increase yield. (3) Premature senescence and degeneration of branches and stems: Plants lack fertilizer or high temperature and drought cause premature senescence, severe spikelet degradation, smaller panicle shape or short grain filling time, insufficient grain filling materials, increased green hull grains, reduced grain weight, and decreased yield. (4) Lodging due to improper application of ear fertilizer, too long basal internodes, long-term deep irrigation without drainage, and Sclerotinia sclerotiorum in the early stage of grain filling can also cause stem lodging; or soil rot, long-term waterlogging without drainage, improper field baking, etc. The root system is poorly developed and prone to root lodging in the later stages of filling. Properly apply ear fertilizer to control the excessive growth of internodes and upper leaves, and strengthen the stalks to resist lodging; bake the field in a timely manner, dry and wet, promote roots, and strengthen the stalks and big ears. Rice planting time in Changde, Hunan

Early rice planting time is March 23--30 for transplanting rice, live broadcast is March 28--April 5; first-season rice planting time is April From the 18th to the 30th, the live broadcast period is from April 25th to May 25th; the planting time for double-cropping late rice and transplanted rice is from June 15th to 28th. Similarities and Differences between Rice Planting in China and Rice Planting in India

Similarities: From a climate point of view, both are located in tropical and subtropical monsoon climates with rain and heat at the same time, with sufficient light, heat and water conditions; from a topography point of view, both areas have It is located in the alluvial plains and wide valleys of the middle and lower reaches of the river. The soil is deep and fertile, making it easy to divert water for irrigation, and the water source is guaranteed. From the perspective of socio-economic conditions: they all have a long planting history and rich traditional experience, intensive farming; dense population, abundant labor force; rice is the staple food of local people, and the market demand is large. China and India can be self-sufficient or basically self-sufficient, with some exports in good years.

Difference: India’s rice production per unit area is lower than that of China, and its growth is very slow.

How long does it take to grow rice?

Take Wuxi, Jiangsu as an example:

On May 15th, the rice fields are filled with water, around May 22nd, the rice fields are dropped (sowing), around June 18th, the rice seedlings are transplanted, and in October The rice will be cut after the 25th. Rice planting technology

Rice is one of the main food crops in Daguan County. It occupies an important position in the county's grain production. Improving rice yield and increasing total output is an important way to ensure food security. To this end, promoting the application of high-yield rice cultivation technology is an important measure to increase rice yield.

1. Select high-yielding, high-quality, disease- and insect-resistant varieties according to local conditions

Select approved varieties based on local ecological conditions, production conditions, economic conditions, cultivation level, and occurrence of pests and diseases. , after trials and demonstrations, they are high-quality, high-yielding varieties that are suitable for local planting and have strong resistance to diseases and insect pests, lodging resistance, strong tillering, high panicle rate, large panicle, and high seed setting rate (such as: Yixiang 725, Qyou No. 6, Yiyou 1988, among which Yixiang 725 has the best quality).

2. Cultivate strong seedlings

Cultivating strong seedlings is one of the key technical measures to increase rice production. Production practice has proved that to cultivate strong seedlings, fertilizer should be used to cultivate soil and soil should be used to protect seedlings. Dryland rice seedling cultivation technology should be vigorously promoted and applied in rice seedling cultivation. Dry land seedling cultivation has the characteristics of early and rapid growth, no obvious greening period, high effective tillering rate, strong resistance, and high seed setting rate. Dry rice seedling beds should be fed with fully decomposed farmyard manure.

2.1 Standard for strong seedlings

Roots: well-developed root system, thick and short, white, without black roots. Seedlings: The base is thick and flat, the leaves are healthy and green, and the leaves are not spread out. The growth is vigorous, the groups are uniform, the individual differences are small, the seedling body is elastic, the leaves are wide and strong, the leaf sheaths are short, the pseudostems are thick and flat, and there are more than 3 tillers by the 30th day of the seedling age. The leaves are dark green, with many green leaves and few yellow and dead leaves. The seedlings are of moderate height and free of diseases and insect pests.

2.2 Sowing

2.2.1 Seed preparation

The selection has been approved and tested and demonstrated, suitable for local planting, resistant to diseases and pests, resistant to lodging, strong tillering, High-quality, high-yield seeds with large ears and high seed setting rate.

2.2.2 Seedbed preparation

Choose mature dry land or vegetable garden land with flat terrain, leeward direction and sunny side, deep and fertile soil as the dry seedling seedbed. Prepare the land carefully in advance to ensure that the soil is finely broken without large soil clods. Adjust the soil moisture to 1.5-1.6 meters, with a trench depth of 30 cm and a bed height of 15 cm. Apply 1500-2000 kg of fully decomposed high-quality farmyard fertilizer and calcium per mu of seedbed. 50 kg and 5-8 kg of potassium fertilizer are used as base fertilizer. Farmyard manure and ordinary calcium need to be fully mixed and fermented about 20 days in advance. When applying fertilizer, it is fully mixed with the soil and the soil surface is leveled before sowing.

2.2.3 Soaking seeds for germination

Before soaking, spread the seeds in the sun for 1-2 days, then soak them in 3% carbendazim solution for 12 hours, and wash them with clean water until the water Start soaking the seeds when they become clear. Generally, it needs to be soaked for 3 days and rinsed with clean water 3-4 times a day. After 3 days, wash the seeds clean, then preheat the seeds with 50-60℃ water, wrap the seeds with wet sacks, and then use straw to keep them warm. Keep the temperature at 30-35℃, and the rice will be ready in 24 hours. After the rice buds are exposed, gradually cool down to about 20°C, spread the seeds, and germinate under natural conditions for one day before sowing.

2.2.4 Sowing

Sowing period: It should be based on local climate conditions. Sowing can be done when the temperature stably passes 10℃ or above. The sowing period in our county is preferably in early April. ;

Sowing: The rice seeds should be sown evenly and densely, and it is advisable to sow 10-12 kilograms per mu of seedbed. After sowing, set up a shed and cover it with film to keep it warm and moisturizing, to prevent bud rot and seedling rot caused by low temperature, and reduce production losses.

2.2.5 Seedbed management

Weeding: After the rice is sown, weeding must be done promptly when weeds appear in the seedbed. Weeding must be done manually by gently pulling out the weeds to prevent damage to the rice seedlings.

Water and fertilizer management: Keep the seedbed soil moist from sowing to the 2-leaf stage, and after the 2-leaf stage, control water and humidity to prevent diseases. When the soil in the seedbed appears dry and white, or there are no water beads on the leaf tips of the seedlings in the morning or evening, or the leaves of the seedlings begin to curl, the film should be removed in the morning and evening for watering. In high temperature weather, the film should be removed at noon for ventilation and cooling to prevent high temperature burning of the seedlings. At the 2-leaf stage, apply 5 kilograms of urea per mu per mu as weaning fertilizer to promote strong growth; at the 4-leaf stage, apply 7-8 kilograms of urea and 2-3 kilograms of potassium fertilizer per mu to promote tillering; at the 4.5-5 leaf stage, seedlings are hardened and prepared. For transplanting, apply 1.5-2 kg of urea per acre as a grafting fertilizer 3-4 days before transplanting.

Prevention and control of diseases and insect pests: According to the occurrence of diseases and insect pests in the seedling stage, appropriate pesticides should be selected to control diseases and insect pests in the seedling stage to prevent the introduction of diseases and insect pests into the field and reduce the incidence of field pests and diseases.

3. Transplanting

3.1 Preparing the field coarsely and finely and applying sufficient base fertilizer

Plow and bury the remaining stubble in time after the rice is harvested before planting. Rake. Precisely prepare the fields to achieve a smooth field surface, so that "the trees are green with irrigation and the fields are drained with no water". The base fertilizer should be mainly organic fertilizer, and nitrogen, phosphorus and potassium should be used in combination. Before planting, apply 1,500-2,000 kilograms of organic fertilizer in conjunction with plowing the paddy fields per mu, and apply 40-50 kilograms of calcium per mu and 8-10 kilograms of potassium fertilizer as base fertilizers in conjunction with harrowing the paddy fields.

3.2 Timely harden seedlings and load them early

Drought-nurturing seedlings should be planted early and medium to small seedlings should be planted. The seedlings should be about 30 days old and grow to the 5-6 leaf stage. It is advisable to transplant, because the root system of drought-raised seedlings is developed and the seedlings are too large, which may easily cause root damage when the seedlings are raised.

3.3 Reasonable dense planting

Determine the transplanting density according to the fertility of the rice field. When transplanting, depending on the tillering condition of the seedlings, plant 1-2 seedlings with tillers in each nest.

Double-row strip planting: large row 0.9-1.0 feet, small row 0.4-0.5 feet, nest spacing 0.4-0.5 feet. From 1998 to 1999, the villagers' groups of Huata in Cuihua Town and Jinping Village conducted comparative experiments between double-row strip planting and conventional transplanting for two consecutive years. Compared with conventional transplanting, double-row strip planting increased yields by 76.4 kg and 88.5 kg per mu, respectively, an increase of 11.2%. % and 13.3%.

Box-type strip planting: open the boxes according to 5 feet, the trench depth is 0.8-1.0 feet, plant 5-6 rows in each box, and the nest spacing is 0.4-0.5 feet. From 1998 to 2000, the Huata villagers' group in Jinping Village conducted comparative experiments between box-type strip planting and conventional transplanting for three consecutive years. Compared with conventional transplanting, box-type strip planting increased the yield by 63.2-76.8 kg per mu, an increase of 10.6-12.1%.

Throwing seedlings: 15,000-18,000 seedlings per mu, and the seedlings should be thrown evenly and densely. From 1998 to 2000, the Yusu villagers' group in Xiongkui Village conducted a comparative test between throwing rice seedlings and conventional transplanting for three consecutive years. The yield of thrown rice seedlings increased by 72.1-79.3 kilograms per mu, an increase of 9.8-11.1%, compared with conventional transplanting.

4. Field management

4.1 Top dressing

Apply 10-15 kg of urea, 15-20 kg of superphosphate, 4-5 kg ​​of potassium fertilizer per mu, 1.5 kg of zinc sulfate is used as top dressing. About 10 days after transplanting, top-dress seedling fertilizer is applied to promote effective tillering, accounting for 30-35% of the total top-dressing fertilizer; during the booting stage, top-dressing fertilizer is applied, accounting for 65-70% of the total top-dressing fertilizer to increase the seed setting rate and Promote grain plumpness.

4.2 Reasonable irrigation

During the growth period of rice, in order to promote good root growth, enhance absorption capacity, and promote strong growth of rice. In terms of water management, the focus is on increasing oxygenation and ventilation, nourishing and living roots, and enhancing root vitality. Appropriate deep water irrigation during the regreening period is beneficial to regreening, while shallow water irrigation should be maintained during the booting stage, initial heading stage and full heading stage. In areas with better irrigation conditions, the remaining periods should be kept moist.

The tillering stage requires shallow water to promote tillering. In the later stage of tillering, it is appropriate to dry the field to control tillering, reduce ineffective tillers, increase permeability, and promote the growth of rice. It is not advisable to dry the field again when drying the field to control tillering; in the dry season, Drought-resistant irrigation is required to prevent dehydration from affecting the appearance quality and cooking quality of the rice; during the filling and maturation period, it is necessary to be dry and wet to strengthen the seeds; during the yellow and mature period, the fields are drained and sun-dried to promote maturity; during harvesting, the fields are water-free to prevent the rice from being soaked in water. Affect rice quality.

5. Pest and disease control

5.1 Main pests and diseases

The main diseases of rice in our county are: rice blast, bacterial blight, sheath blight, rice smut Diseases, etc.; the main pests include: rice planthoppers, rice borers, armyworms, rice mudworms, etc.

5.2 Prevention and Control Measures

In the prevention and control of rice diseases and insect pests, we must adhere to the plant protection work policy of “prevention first, comprehensive prevention and control”. Comprehensive prevention and control measures centered on planting disease-resistant and pest-resistant varieties, based on fitness cultivation, and supplemented by pesticide protection.

5.2.1 Agricultural prevention and control: select insect-resistant varieties, cultivate strong seedlings, reasonably densely plant, rationally fertilize, and scientifically irrigate; timely remove plants damaged by diseases and insect pests to reduce the base of diseases and insect pests in the field; timely control of rice after harvest Plow rice fields, remove weeds in and around the fields in winter, destroy overwintering sites for pests and diseases, and reduce the number and incidence of pests and diseases in the coming year.

5.2.2 Chemical control: Strengthen field surveys to timely grasp the occurrence of pests and diseases; during the growth period of rice, use high-efficiency, low-toxic, non-residue pesticides to prevent and control pests and diseases, and maintain a 3-6cm water layer in the field after application3 -5 days.

Soak the seeds with 500-700 times of 20% tricyclazole wettable powder for 24 hours, wash and accelerate germination; 30 grams of 75% tricyclazole wettable powder or 40% Kewen powder per mu Mix 150-200 grams of EC with 50-60 kg of water and spray to control rice blast.

Soak the seeds with 500 times of 10% strong chlorine essence for 48 hours, 500 to 600 times of 20% thiocumazole wettable powder, and 500 to 800 times of 45% acetonium aqueous solution. 24~48 hours. Spray 10% strong chlorine essence 500 times once at the three-leaf stage of rice and 5 days before transplanting. Use 28 to 35 grams of 35% chlorazine wettable powder per acre, or 15% chlorazol. 20-25 grams of wet powder, or 23 grams of 45% acetonium aqueous solution mixed with 50-60 kilograms of water can be sprayed to prevent rice bacterial blight.

Use 50-76 ml of 20% Fenxin EC or 100g of 50% Carbendazim wettable powder, 50-75g of 30% Tritonin wettable powder per acre, add 100kg of water and spray. Or mix 25kg of fine soil and spread it to prevent and control rice sheath blight.

5 to 10 days before heading, use 150 ml of 5% Jinggangmycin aqueous agent per mu or 75 ml of 20% Fenxixin EC or 150 ml of 12.5% ​​Trichomycin aqueous agent and mix with water 50-60 Kg of spray can be used to control rice smut 1 to 2 times.

Use 10% imidacloprid wettable powder, or 25% Youlade wettable powder 2000-2500 times liquid, or 5% Ruijinte glue suspension 1200-1500 times liquid to spray to control rice planthoppers .

Before sowing or transplanting, mix 2.5-3 kg of carbofuran granules per acre with 15-20 kg of fine soil and spread it; when transplanting, use 90% trichlorfon crystal 0.5 mixed with water. Soak the seedlings in 400-500 kilograms for 10 minutes; use 50% fenitrothion EC or 50% Badan aqueous solution 800-1000 times to spray to control rice borers during the field period.

Kill with Trichlorfon or 50% Fenitrothion EC 800-1000 times solution, 25% Difenzofen or 25% Difenzofen 500 times solution, 20% Mesothrin or 2.5% Dimethrin Use 4000-5000 times of EC to spray to control rice armyworm.

Use 3-4 catties of 25% trichlorfon powder per acre; or 4 catties of tobacco powder mixed with 25 catties of slaked lime, and spread it when the morning dew is still wet; use 800 times of 50% fenitrothion; Or spray 90% crystalline trichlorfon 1000 times to control rice mudworms.