When is rice insect treatment and rice pest control time?

It is best to spit out the previous one.

1.The three most common diseases at the seedbed stage are cotton rot, blight and bacterial wilt. Rice is susceptible to cotton rot at low temperatures.

Cotton rot rice will consume a large amount of nutrients in the endosperm, and it is impossible to grow into strong seedlings. The trick to prevent cotton from rotting is to use copper hydroxide and triethyl aluminum phosphate to prevent cotton from rotting before watering after sowing.

2.During the tillering stage of regreening, rice absorbs a large amount of nitrogen, which is also the period when nitrogen fertilizer is most needed. During this period, the organs of plants are fragile and susceptible to various pests and diseases, the main pest of which is the rice planthopper, and the main disease is sheath blight.

3.Rice planthoppers occur mainly in the south. This pest destroys the cellular tissues of rice and absorbs nutrients, making it difficult for ears to grow.

Once the outbreak of rice planthopper lasts for a long time, it is easy to cause a large-scale reduction in yield. The control of rice planthopper is mature, and neonicotinoid insecticides such as pymetrozine and dinotefuran have good insecticidal effects on rice planthopper.

4.During the jointing stage, the most common pests in southern China are the dimorphic borer and the rice borer. These two insect pests will cause the rice to empty and the ears to turn white, which will seriously affect the yield.

The disease at this stage is rice blast, and the best time to control rice blast is 5-7 days before the panicle breakage stage. The use of traditional pesticides rice blast and pyrisulfuron will have a good effect.

The best time for rice insect control is after the jointing period, which is in the midsummer stage, the temperature is high, and there are more insect pests, so the control effect is more obvious at this time, which is much better than usual. However, it is necessary to pay attention to the time of spraying, avoid the high temperature at noon, and choose a sunny morning for spraying control. It is best to do this in the morning after the dew has dried, around 10 o'clock in the afternoon, and after 3 o'clock in the afternoon.

In addition, it is necessary to take personal protection preferably.

Summary. The control schedule of rice pests and diseases can vary according to the characteristics of different regions and seasons. The following is a general rice pest control schedule for reference:

1. Autumn: Season: Generally after the rice is harvested, it enters autumn.

Control objectives: to remove stubble, reduce the growth of pests and germs. Prevention and control measures:

Thoroughly remove the stubble in the field and plough the soil deeply to promote the decomposition of the stubble. Field sterilization and insect control treatments can be carried out. 2. Spring:

Season: Generally in the spring after the rice is about to be sown or emerges. Prevention and control objectives:

Prevent the invasion of pests and germs, and protect the growth and health of seedlings. Control measures: Soil disinfection should be carried out in a timely manner before sowing.

Use healthy seeds when sowing and keep the field well drained. According to the actual situation, spraying drugs for pest control should be carried out in a timely manner.

The control schedule of rice pests and diseases can vary according to the characteristics of different regions and seasons. The following is a general rice pest control schedule for reference: 1. Autumn:

Season: Generally after the rice harvest and into autumn. Prevention and control objectives:

Remove stubble and reduce the growth of pests and germs. Prevention and control measures: completely remove the stubble in the field, and turn the soil deeply to promote the decomposition of the stubble.

Field sterilization and insect control treatments can be carried out. 2. Spring: Season:

It is generally in the spring after the rice is about to be sown or emerges. Control objectives: to prevent the invasion of pests and bacteria, and to protect the health of seedlings.

Prevention and control measures: Before sowing, the coarse soil should be disinfected in a timely manner. Use healthy seeds when sowing and keep the field well drained.

According to the actual situation, spraying drugs for pest control should be carried out in a timely manner.

3. Growing season: Season: rice growing season.

Objectives: to protect rice plants and prevent and control the occurrence of pests and diseases. Prevention and control measures:

Closely observe the situation in the field to detect and identify the symptoms of pests and diseases early. According to the development of pests and diseases, appropriate control measures should be taken, such as spraying pesticides and using biological control. 4. Maturity period:

Season: The period before rice reaches maturity. Prevention and control containment and objectives:

Prevention and control of the occurrence of pests in stored grain. Control measures: Regularly check the storage of rice and remove pests in time.

The specific control schedule should be adjusted and formulated according to the local climate, the occurrence of pests and diseases, and agricultural management practices. It is advisable to consult with a local agricultural technician or a specialist in the field of agricultural pest control to obtain a more accurate and appropriate timetable for rice pest control.

Possible symptoms of grass seedlings: yellowing, dwarfing, wilted sheath of borer. Prevention and control objects:

borers, leaf rollers, rice planthoppers, sheath blight; Promote the rejuvenation and hair of grass seedlings. The second medication: the seedlings entered the late stage of effective tillering and the early stage of jointing in the Tanxian tribe; Seedling symptoms:

Sheath blight, borer blight, leaf whitening control object: sheath blight, leaf roller borer, borer, rice planthopper third medication: rice break between 8-10%.

Before September 20, the safe breaking period of late rice affected the breach by low temperature. Prevention object: borborer, rice blast, sheath blight, rice koji disease, rice planthopper, leaf roller borer in addition to the spraying time to let two points of attention:

1. It is the height of summer, and it is necessary to avoid high-temperature work at noon, which is easy to suffer from heat stroke or poisoning. Under normal circumstances, the dew can be sprayed after the dew dries in the morning, and it ends at about ten o'clock; Spraying after 3 p.m. stops when the dew comes up. On cloudy days, there is no Zen with dew to apply the medicine, and it is best to bring some synergist when spraying to ensure that there is no rain within 3 hours, otherwise it needs to be re-struck.

Early rice and middle rice are earlier, and late rice is late. Under normal circumstances, flowering usually begins at 9 a.m. It is most prosperous at noon, and it blooms less after 4 p.m.

When a flower opens, it is about an hour from the opening of the slice to the time it closes.

In June, the rice borer to prevent and control the first generation of three borers and two borers, in the single-season late rice mainly area, early rice and early sowing single-season late rice seedling field to treat the first generation of three borer, the insect population base is low to advocate artificial egg collection and "catch the dry heart", to determine the target field of key drug methods. The first generation of the two borers should be treated vigorously, and the prevention and control of late-maturing and early rice should be particularly strengthened, and the treatment of the borer can be combined with the prevention and control of rice blast and sheath blight. Acute rice blast must be treated as soon as possible and eradicated at the initial stage.

July: Early rice is mainly used to prevent sheath blight and the second generation of sheath borer, and late June and early July is the period of expansion and spread of sheath blight. In areas where double-cropping rice is the mainstay, it is necessary to vigorously control the second-generation and three-cropping borer, and all single-season late rice, late-season rice seedling fields with tender green growth, and late-maturing early rice fields that are breaking and heading should be controlled.

Mid-July is the period when white-backed planthoppers occur, which can be combined with the prevention and control of three moths. For early-maturing japonica rice, it is necessary to prevent the sudden damage of ear neck blast in the first and middle months, and pay attention to the prevention and control of leaf rice blast and rice thrips in a single season from late June to the beginning of this month. At the end of July, both late-maturing early rice and single-season late rice should be prevented from sudden damage to rice leaf roller borer and rice bracts.

From the end of this month to the beginning of August, it is a critical period for the prevention and control of sheath blight in single-season late rice and late season rice.