There are many pests and diseases in the middle and late stages of rice, what pests should be contro

It can be decided whether to control or not according to the amount of insects in the field; Rice koji disease must be sprayed in advance to prevent, if not sprayed to prevent, rice koji disease is easy to epidemic in rainy weather in the later stage, resulting in a significant reduction in rice yield; For poor field management and susceptible rice blast varieties, rice blast should also be sprayed in advance to prevent it. Timely spraying prevention is the key measure.

It is recommended to use tebuconazole, oxime tebuconazole (dichloroconazole), enazole, fluconazole and oxime amine in time about 10 days before the rice breach (when the booting belly is obvious). Tebuconazole, wells. Alkene.

Spraying prophylaxis of cycloazole, Bacillus jinggang, Bacillus cereus, prochloraz, benzoxystrobin and other agents.

It mainly controls the two borers, as well as leaf rollers, rice planthoppers, three borers, moths, etc. We mainly use pesticides, avermectin, insecticidal bis, imidacloprid and at the same time prevent the occurrence of rice blast by using zeazole.

It is easy to remove insects, basically after two hours, the insects will die, basically to harvest will not be infested again, generally can be used 15-20 ml 19% per muChlorworms. Trifluorobenzene, 11% avi.

Trifluorobenzene, 23% broma. Trifluorobenzene, or Fugo and other spraying control, the effect is good, and at the same time, it can also be very good for pests such as borer. During the rice filling period, the water layer in the field is shallow or there is no water, and the water consumption should be increased when spraying.

Sheath blight is one of the most common diseases in the middle and late stages of rice growth. Sheath blight is a fungal disease, which mostly occurs in the late tillering stage of rice to the heading stage, and the infection site of the disease gradually spreads from the bottom of the initial rice stalk to other parts, and the most serious part will extend to the panicle part of rice. In order to give full play to and improve the prevention and control effect of pesticides and reduce the negative impact of strong light and ultraviolet rays, it is recommended to use drugs in the evening, and it is strictly forbidden to apply pesticides in the field at noon.

Pay close attention to the weather conditions, try to avoid medication during rainfall periods, and immediately increase the dosage of medicine for supplemental treatment if you encounter moderate or above rainfall within 4 hours after prevention and treatment.

The main pests in the late growth stage of rice are white-backed whitefly, brown whitefly, armyworm and rice leaf borer, which have long-distance migration and suddenness, and should pay attention to timely control of rice borer.

For example, there are rice sheath blight, rice blast, rice borer, rice black-streaked dwarf disease, rice planthopper, rice leaf roller borer, etc., these are some of the pests and diseases that appear in the middle and late stages of rice planting.

Rice blast, rice white leaf blight, bacterial stripe spot, rice koji disease, rice planthopper, rice borer, and rodent pests are all to be controlled.

In the later stage of rice growth, the prevention of some pests and diseases is very important, especially the prevention of aphids. Also, pay attention to the weather forecast to prevent common natural disasters.

In the middle and late stages of rice, it is necessary to control insect pests such as rice planthoppers, rice borers, rice armyworms, rice bracts, and rice leaf rollers.

There are three main types of pests and diseases in the middle and late stages of rice: the first is brown planthopper; the second is ear neck blast; The third is the three-chemical borer.

In the process of rice cultivation, lodging of varying degrees often occurs. Basal lodging and stalk lodging are common in field lodging. In production, basal lodging is the main phenomenon, and it is mostly grown in the middle and late stages of rice growth, from the early stage of fruit setting to the mature stage, because it is in the rice grain filling stage at this time, it is necessary to consider it from the perspective of safe planting.

From the perspective of ensuring stable production and safe production, we will pursue a reasonable yield according to the actual situation. Moreover, the current rice varieties have a characteristic, most of the varieties with good yield, good quality and good taste are resistant to lodging.

The relationship between fertilizer and lodging, many years of practice has proved that everything is based on sufficient fertilizer, top dressing early, and correctly grasp the critical period of fertilization, so that it will not be lodging in the later stage because of greed. The critical period of top dressing of double cropping rice is: before May 20 for early rice and before the end of August for evening rice.

Now the single-season super rice rice fertilization is also particular, if the amount of fertilizer used in the growing period is too large, nitrogen fertilizer urea topdressing is too much, resulting in the growth of the lodging. In 2012, Shen Taiping, a farmer in my village, planted an acre of two-season late rice, the rice growth period is 125 days, and the amount of fertilizer per mu is 50 catties of base fertilizer.

There are many reasons for rice lodging, in addition to some objective reasons such as strong storms and rains, there are three main reasons: first, the variety is not resistant to lodging, such varieties are generally taller, longer basal internodes, thinner stalks, scattered leaves, and underdeveloped roots; Second, the tillage layer is shallow, the planting density is large, and the water slurry management is reasonable. Interstitial irrigation is the main method to keep the field moist.

From the emergence to the 3-leaf stage, the aqueous layer is generally not established to promote the root system. From the 3-leaf stage to the 7-leaf stage and the jointing and booting stage, a shallow water layer is established in the field, and the interstitial irrigation is mainly used in the previous time, so that the water and gas in the cultivated layer can reach the best state.

Rice lodging prevention in the later stage, in the production should be in the seedling stage according to the requirements of rice varieties reasonable dense planting, tillering later control of vigorous growth, seedling shelving should be in place, booting period dry and wet alternately, plus drugs to strengthen the stem, booting nitrogen fertilizer can not be heavy, section checks. This is the only way to effectively prevent lodging in later stages. Master the drainage time, drain the field in an emergency, pay attention to fertilization, make the rice seedlings strong, remove the non-yielding rice whiskers in an emergency, pay attention to pests and diseases, and pay attention to windy weather.

Strengthening the prediction of diseases and pests is a necessary measure to prevent diseases and pests in the later stage of rice. Plant protection stations and township agricultural technology extension stations have dispatched full-time monitoring and reporting personnel to conscientiously do a good job in forecasting, reach the prevention and control indicators, organize farmers to carry out unified prevention and control in a timely manner, and guide prevention and control during the critical period. When most of the local rice has entered the full heading stage to the grain filling stage, that is, the critical period of yield improvement and pest control, agricultural technicians need to combine the actual local situation to carry out key monitoring and control of key diseases and pests and key areas to ensure that the control measures are implemented.

Great attention should be paid to the choice of fertilizer, as only in this way can the normal growth of rice be better ensured.

First of all, it must resist lodging, and the fertilizer applied should not be too much, it should be more even, it must be a small amount many times, and all the grass must be pulled out.

The common pests and diseases of rice are divided into two categories: diseases and insect pests, among which the main diseases are rice white leaf withering and rice seedlings and rice sheath blight. There are five kinds of insect pests: two borer, three borer, big borer, rice leaf roller borer, and rice planthopper.

Sheath blight is a decrease in rice's own immune system, weakened insect resistance, powdery mildew, mold disease, and rice blast.

I think there will be scab, powdery mildew, rust, wilt and sheath blight.

Mold rot often occurs in rice in the middle and late stages of growth. It is a disease that occurs due to poor weather conditions and poor permeability. Therefore, we should pay attention to the field management of rice in the middle and late stages.

<> about 5 days before transplanting, 5-7 days before the sealing period, and 5-7 days before the breach are the three periods of rice pest control. About 5 days before transplanting, 100 grams of Antaisheng, 60 ml of Daoteng, 6 grams of Emele, and 60 kg of water are evenly sprayed with water, which can prevent and control pests and diseases such as borer, leaf roller, planthopper, etc.; During the closure period, 30 ml of rice per mu, 10 grams of extremely sharp, 10 grams of enemy, and 60 kg of water can be evenly sprayed, which can prevent and control a variety of rice diseases and pests.

The three stages of <> control of rice diseases and insect pests are the end of tillering, the breaking stage and the panicle stage. For the control of rice diseases and insect pests, long-lasting pesticides can be applied, such as chlorantraniliprole can be used in the control of rice borer and leaf roller, and pymetrozine, dinotefuran, trifluoropyrimidine and other agents can be used for the control of rice planthoppers. When using insecticide drugs, 100-200 grams of phosphorus source library, potassium source library and other high-purity potassium dihydrogen phosphate can be added, which has obvious yield increasing effect.

Pesticides. Because after the pesticide is applied to my rice, the rice borer is gone, so I think I can use the method of pesticide to control it.

Special chemical fertilizers should be used, as only then will it be better to avoid the invasion of this pest.

First of all, we can choose some of the natural enemies of these rice borers to put into the rice field, and at the same time, we should use some pesticides to expel them.