Can rice be sprayed during the flowering period, and is it suitable for pesticides during the rice f

It can be sprayed, and the rice is in the heading and flowering stage, the critical period of pest control, and it is also the decisive stage to determine the yield of rice.

During the flowering period, you can spray pesticides to avoid the flowering period, and the rice flowers most vigorously at 9:00 a.m. and 11:00 a.m.

When the rice blooms, the glume shell opens, and the flower elongates very quickly to stretch the pollen out of the glume shell, if the rice is applied at this time, the liquid or pollen can easily enter the flower and hurt or kill the pollen, anthers, ovary, etc.

In addition, the flower sap will also wash the pollen off, thereby affecting the pollination of rice, directly causing the increase of rice infertility rate, and making the rice yield seriously reduced. Therefore, spraying pesticides on rice should be carried out before or after noon, and the action should be light, and the rice ears should be avoided as much as possible.

Extended information: Rice is divided into indica and japonica rice, early rice and middle and late rice, glutinous rice and non-glutinous rice according to rice type. According to the way of seed retention, it was divided into conventional rice and hybrid rice, and according to whether it was soilless cultivation, it was divided into paddy rice and floating rice.

According to the survival cycle, it is divided into seasonal rice and "lazy rice" (regenerated rice in more years), and according to the height and shortness, it is divided into ordinary rice and giant rice of about 2 meters. According to salinity tolerance, it is divided into ordinary freshwater rice and "seawater rice" (in fact, it mainly uses fresh water).

The fruit of rice is rice, and the rice is called brown rice after removing the glume husk, and the brown rice can be obtained by grinding off the rice bran layer. Nearly half of the world's population depends on rice as the staple food, and in addition to being edible, rice can also be used as industrial raw materials for brewing and sugar making, and rice husks and rice stalks can be used as livestock feed.

However, pay attention not to increase the amount of pesticides at will, blindly increase the amount of pesticides, which increases the cost of pest control and is easy to cause pesticide damage to crops. In addition, pesticides must be prepared and used to prevent chemical reactions between pesticides and reduce their efficacy.

There are many thunderstorms in summer and autumn, and adding additives to pesticides can not only improve the effect of the liquid, but also delay the erosion of rainwater, and better ensure the control effect.

Extended Information: Rice Fertilization Essentials:

Generally, Honda fertilization is divided into three periods according to the growth process of rice: before, during and after the growth process, the early stage refers to the vegetative growth stage of rice from transplanting to the end of sinning, that is, the vegetative growth stage of rice.

The middle stage refers to the reproductive growth stage (pollen formation period) when rice growth has entered the stage of reproductive growth, and the goal is to strengthen the stalk and attack the large spike, but the fertilization should not be too much;

The later stage refers to the period when rice enters the heading to maturity, at this time, it is mainly to attack more grains and full grains, not only to keep not to lose fertilizer, but also not to be greedy for green and late maturity.

Rice flowering period at this time spraying is OK, but must be avoided, flowering, flowering time is mostly in the morning 8 o'clock to 2 pm, 9 11 o'clock for the flowering period, in the flowering period choose to spray in the evening, avoid the flowering time can reduce the damage to rice flowers. However, hormonal pesticides are not recommended.

Top dressing is not recommended during the flowering period, because the ability of the roots is degraded at this time, and the fertilizer use efficiency is reduced. It is recommended to spray Trim amino acid foliar fertilizer once at the budding stage, heading stage, and full heading stage, which is the best.

At this time, the period of special sensitivity to water, first of all, to ensure that there is no shortage of water, not subject to drought, generally maintain a 30 mm water layer in the field, so that the absorption of nutrients by rice plants is smooth, maintain the maximum photosynthetic efficiency, promote spikelet differentiation, and reduce spikelet abortion. In addition, it is necessary to prevent diseases, and the main insect pests to prevent are dimorphic borer, rice bract, armyworm, rice leaf roller, and rice planthopper, etc., and the main diseases are panicle rice blast, sheath blight, browning panicle, etc., and we must strengthen disease prevention and control.

In case of insect infestation, it is recommended to use Kangkuan, the effect is better. Rice blast can be used for a series of preventive drugs such as chunleimycin.

I can spray medicine. But avoid the time of day when flowers bloom for fertilization. The rice flowering period is before 9 a.m.

Spray after 4 p.m. Do not use hormonal pesticides. Strictly follow the dosage used.

For rice. Growth has little effect.

In fact, it is possible to apply pesticides during the flowering period of rice, but it is best to avoid the time of day when it blooms and is fertilized. The rice flowering period should be applied before 9 o'clock and after 4 o'clock in the afternoon to avoid the flowering period. In addition, it is necessary to choose the right and reasonable agents and fertilizers for proper spraying.

1. Choose the right time to spray.

Try to avoid flowering for medication: Generally, rice is used at 9:00 a.m. to 11:00 a.m

The flowering at 00 is the most abundant and the most vigorous. When the rice blooms, the glume shell opens, and the flower elongates rapidly to stretch the pollen out of the glume shell, if the rice is pesticide-applied at this time, the liquid or powder is easy to enter the flower, injure or kill the pollen and anthers.

Ovary, etc. In addition, the flower sap will also wash the pollen down, thereby affecting the pollination of rice, directly resulting in the increase of rice infertility rate, resulting in a serious reduction in rice yield. Therefore, spraying pesticides on rice should be carried out before or after noon, and our actions should be as light as possible when spraying, so as to avoid hurting the rice ears and causing unnecessary losses.

2. Choose the right agent.

The rice heading and flowering period is a critical period for the prevention and control of ear neck blast, rice koji disease, sheath blight, rice borer and other pests and diseases, so we must seize the opportunity and use drugs rationally. If the pesticide is not selected properly or the concentration is too high, it will have an adverse effect on rice seeding.

3. Check the concentration of drugs.

The panicle tissues that have just been extracted from the rice flowering stage are young and tender, and the ability to resist pesticides is very weak. Therefore, when spraying pesticides, the dosage and concentration of pesticides must be strictly controlled to prevent pesticide damage to rice. If there is a long sunny drought and dry air conditions, the amount of water should be appropriately increased when preparing the liquid medicine to avoid spraying damage.

Pesticides should be used carefully during the flowering period of rice to prevent the reduction of rice yield caused by improper application of pesticides.

4. Use foliar fertilizer.

There are three main benefits of using foliar fertilizer during the heading and flowering period of rice.

First, heading and flowering coincided with high temperature and drought, which had a great impact on flowering and fertilization. By spraying Strim amino acids.

Foliar fertilizer can promote the development of pollen and the elongation of pollen tubes, enhance the humidity of the stigma, enhance the fertilization ability, and promote the completion of fertilization and fruiting. Reduce empty particles and increase yields.

Second, it can enhance the ability of rice itself to resist high temperatures. Foliar spraying of pepticoboron can enhance the ability of rice to resist disease and high temperature and drought during the heading and flowering stage. Also, take care to irrigate to keep the field moist.

Thirdly, it can protect functional leaves and roots, promote the absorption of mineral nutrients by rice, and promote the development of roots. In the later stage, it can resist lodging. The most important thing is that 90% of the formation of rice yield comes from the transfer of photosynthetic products of functional leaves, and protecting functional leaves and prolonging the life of functional leaves is the guarantee of high yield.

The control agent should try to choose a good control effect, with increased yield and also to prevent sheath blight and rice koji disease, and can be added to brassinolide.

and other high-quality growth regulators, so as to achieve "one spray with multiple prevention" and "disease prevention and increase production".

Pesticides cannot be used during the flowering period of rice. Because the flowering period is the pollination period, pesticides will fall off the pollen at this time, and the pollen cannot be pollinated after being stained with pesticides. Therefore, the application of pesticides during the flowering period will cause a reduction in yield.

It is better not to use rice during the flowering period, this time is the time of rice pollination, fungicides and insecticides are best to avoid this time period, otherwise it is easy to cause rice yield reduction and quality reduction. The weather is relatively cool during the week from the time the rice is planted to the time it emerges. The large and medium sheds are mainly sealed and insulated, and care should not enter and exit with cool breezes.

Try to extend the first and second watering time, that is, after the seedlings come out, do not water first, and then water the first time when the seedbed soil is hard to touch. After watering, water again when the bed soil is very dry. When the seedlings are one and a half leaves, they begin to ventilate and refine the seedlings, and the squatting seedlings prevent them from growing.

Generally, as the seedlings get bigger and the weather gets warmer, gradually extend the ventilation time and increase the ventilation openings.

When the seedlings are one and a half leaves to two and a half leaves, it is an important time to prevent the seedlings from getting diseases, and it is necessary to focus on preventing the occurrence of bacterial wilt and blight. Rice is easy to lack fertilizer after 2 and a half leaves, and the leaves of seedlings will generally turn yellow and not so green, at this time, we should pay attention to fertilization once, you can use Yanwo potassium dihydrogen phosphate + Yanwo zinc fertilizer, the effect is better.

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The rice flowering stage refers to the ulnar chain stage when rice plants begin to flower. During this period, rice plants have entered the stage of simple growth, and the flowering process has an important impact on the yield and quality of rice. In general, it is not recommended to spray pesticides during the flowering period of rice.

This is because the flowering stage of rice is exposed to the outside of flowering, and the flower buds and pollen are sensitive to the external environment, including chemical pesticides. Spraying pesticides may cause damage to rice flowers and affect pollen falling on pistils for pollination, thus affecting rice fertilization and seed setting. However, in some special cases, such as severe insect infestation or disease attack during the flowering period of rice, some emergency measures may be required to control the occurrence of pests and diseases or sleepiness.

In this case, spraying selective and low-toxicity pesticides can be considered and operated at the right time to minimize damage to the rice flowering site. In general, in order to ensure the yield and quality of rice, as well as the safety of the environment and human health, it is recommended to follow the standard operating practices for the use of pesticides, and scientifically and reasonably select the timing and method of pesticide use according to the climatic conditions of the planting area and the characteristics of rice varieties. At the same time, agricultural management should also be strengthened, comprehensive prevention and control measures should be adopted, and the prevention and control of pests and diseases should be done well, so as to reduce dependence on pesticides.

<> rice flowering period needs to be sprayed, and pesticides should be sprayed when rice blast, sheath blight, borer and other pests and diseases occur. 1. Rice blast: it can be divided into leaf blast and ear neck blast, leaf blast will appear pinhead-shaped, dark brown lesions in the early stage of the disease, and the lesions will continue to expand, and there will also be diamond-shaped or round lesions on the leaves, and the panicle neck blast will appear after the onset of the disease, and produce white ears, empty grains, and grains, such diseases can be prevented and controlled with drugs such as tricyclazole and rice blast.

2. Sheath blight: it mainly harms the leaf sheath, and there will be disease spots near the water surface of the plant after the onset of the disease, and some disease spots will converge with each other, which can be prevented and controlled with drugs such as Jinggangmycin.

First, whether to spray rice flowers

Rice needs to be sprayed when it enters the flowering stage, and pests and diseases such as rice blast, sheath blight, and two borers often occur at this time.

1. Rice blast.

1) Leaf blast. At the beginning of the disease, pinhead-shaped lesions appear, mostly dark brown in color, and the lesions will continue to expand, and diamond-shaped lesions (gray-white on the inside, yellow on the outside, with brown necrotic tissue in the middle) or round lesions (water-stained, gray-green) will also appear on the leaves.

In severe cases, the leaves will die and the plants will shrink.

2) Spike neck blast.

This disease often occurs after the emergence of the head, and the rice panicle will have a broken neck after the onset of the disease, and produce white ears, empty grains, and grains.

3) Prevention and control methods.

Spray tricyclazole, rice blast and other drugs.

2. Sheath blight.

1) The main damage part of this disease is the leaf sheath, the leaves and stems will also be damaged, after the onset of the disease, there will be dark green, water-soaked lesions near the water surface of the plant, and then gradually expand into an oval shape, and some lesions will also converge with each other to form irregular moire-shaped, dark gray greenish patches, so that the leaves lose their photosynthetic ability, and then lead to yield reduction.

2) After the occurrence of this disease, drugs such as Jinggangmycin can be sprayed.

3. Two borers.

1) Rice will have symptoms such as withered sheath and dry heart after being harmed by the borer, and white ears will appear after heading, and empty grains, grains and inability to bear fruit if it is bored late.

2) After the occurrence of this insect infestation, avermectin, emamectin benzoate and other drugs can be sprayed.

2. How many days is the flowering period of rice?

1. Duration of flowering period.

1) After the rice enters the flowering period, it usually lasts for about 7 days, and the flowering time is mostly from 9 am to 2 pm on sunny days, and the flowering is at its peak at noon.

2) The flowering duration of rice (from open to closed) is usually about 46-92 minutes, and the flowering time will be affected by temperature (higher temperature is conducive to the opening of the flower) and pollination progress.

2. Management methods for flowering period.

1) Foliar spraying of humic acid foliar fertilizer, potassium dihydrogen phosphate and other fertilizers can not only alleviate high temperature and heat damage, improve the stress resistance of rice, but also promote grain filling and delay premature leaf aging.

2) It is necessary to maintain water during heading and flowering, and keep 8-10 cm of water layer in the field in case of high temperature weather to improve the microclimate of the field.

3) Before entering the breaking stage, it is necessary to pay attention to the prevention and control of diseases to avoid plant death.