What is the use of propanium herbicides? Is it harmful to rice

The use of propanium herbicides is as follows:

1.When using propanoid herbicides, it is necessary to grasp the medication period, and in general, the longer the window period of medication, the lower the probability of pesticide damage.

2.Propanium is a kind of contact herbicide with strong selectivity, which can quickly kill weeds in rice fields, and the stems and leaves of weeds will begin to wither after a few hours of application, and the liquid will destroy its water balance after entering the barnyard grass, accelerate the rate of water loss, resulting in the separation of cytoplasmic wall, and the leaves will eventually slowly dry up and die.

Aperium herbicides are harmful to rice because they contain certain toxicity and can lead to pesticide damage if used incorrectly, such as overdose or failure to follow the correct operating procedures during the medication process.

Propanil is a highly selective contact herbicide, which is prone to pesticide damage (i.e., harmful to rice) when used improperly. The tolerance of rice to barnyard grass is about 100 times that of barnyard grass, and reasonable use can effectively control weeds such as barnyard grass, goldenrod, and horsetail.

Propanil is an amide selective contact herbicide post-emergence herbicide. After weeds are treated with pesticides, photosynthesis is destroyed, and rice has a strong ability to decompose propanny, that is, the propanium herbicide decomposes and detoxifies in the rice, so it is safer for rice.

However, the barnyard grass in the rice field is not so lucky, because it lacks this detoxification function, which will lead to the imbalance of cell water metabolism, and soon lose water and die.

However, because carbaryls, sec-butylcarb, pyroxacarb, chlorcarb and other carbamate and organophosphorus insecticides can inhibit the activity of dibarium detoxification enzyme in rice, therefore, rice can not use such pesticides within 10 days before and after spraying dibarium, let alone mixed with these pesticides, so as to avoid pesticide damage to rice.

What is the remedy for herbicide damage in rice? Symptoms and remedies of rice herbicide damage: 1. Rice damaged by herbicides generally appears yellowing and dwarfing of old leaves 5-10 days after application, brown spots appear on yellowed leaves, and yellowing of leaves from the tip of the leaf to the bottom; The seriously damaged rice seedlings have more yellow roots and fewer white roots, and the seedlings can be brought up by gently pulling them by hand; The new leaves are short and narrow, and the extraction is slow, and the occipital of the upper leaf is lower than that of the lower leaf; The seedlings in the field are staggered and uneven.

2. If the pesticide damage is light, mix 20-30 kg of potassium chloride, 6-10 kg of urea, and 2000-3000 grams of granular zinc fertilizer per mu and sprinkle it. 3. If the pesticide damage is serious, mix 40 kg of potassium chloride, 12 kg of urea, and 4000 grams of granular zinc fertilizer per mu and sprinkle it, and keep it in the shallow water layer for 5-7 days. Generally, rice grows a leaf in about 5 days, and the field growth begins to improve in 7-10 days after treatment, and it can recover after 15 days.

It can be sprayed with some special pesticides after 10 days of pesticide damage, or remedied by transplanting.

Strengthen the fertilizer and water management of pesticide damage fields, promote seedlings and tillering with fertilizer, apply 10 kg of 45% compound fertilizer per mu, and irrigate with shallow water to facilitate onion management and leaves.

At present, the main resistant weeds in China's rice crop fields are barnyard grass, Qianjinzi, weedy rice, wild cigu, duck tongue grass, hollow lotus seed grass (water peanut) and so on.

The main varieties of herbicides used in paddy fields are dichloroquinolic acid, cyanofluoxate, pentaflusulfam, oxazolachlor, butachlor, prochlor, benzsulfuron, pyrisulfuron, bendasone, 2-methyl-4 chloro and their compound preparations.

Pyrisulfuron belongs to the sulfonylurea herbicide, which is a selective systemic conductive herbicide, which is mainly absorbed through the root system, and rapidly transferred in the weed plant, inhibiting growth, and gradually dying of weeds. Rice can decompose the agent and has little effect on rice growth. The efficacy is stable, the safety is high, and the duration of the effect is 25 to 35 days.

Pyrisulfuron has good safety for rice, but late rice varieties (japonica, glutinous rice) are relatively sensitive, and should be avoided as much as possible at the germination stage of late rice, otherwise it is easy to produce pesticide damage.

In dry fields, rice barnyard can be treated with bioxalin, herbicides, etc.

Barnyard grass control methods.

Barnyard grass can be said to be on the list, is the first major malignant weed in the rice field, at present there are more and more kinds of barnyard grass, from the perspective of rice planting areas in various places, there have been green barnyard grass, sponge barnyard barnyard grass, red stem barnyard barnyard grass, long barnyard barnyard and so on. Due to factors such as non-standard and unscientific medication over the years, the resistance of barnyard grass is also increasing, so many people report that ordinary pesticides are not completely controlled.

For the control of barnyard grass, the commonly used pesticides for many years, such as pentaflusulfachlor, dichloroquinolic acid, cyanofluoxate, etc., have produced resistance to pesticides, and the effect is very unsatisfactory. I also said above, the early blocking treatment is very critical, and the same is true for the drug-resistant areas, we must do a good job in the early stage of closed weeding, and then cooperate with stem and leaf treatment, the combination of the two can effectively prevent and control multi-resistant barnyard grass.

As for the use of blocking drugs, there is no fixed standard, and butachlor, prochlor, pendimethalin and other agents can be selected according to the planting method, which can not only greatly reduce the base number of barnyard grass in the field and suppress the leaf age of weeds, but also pave the way for the later stem and leaf weeding.

After the 4-leaf stage of rice, if there are more barnyard grass (grass age 3 to 5 leaf stage) in the field or more double-spike paspalum and rice Li's grass, 10% bioxaether suspension agent can be used for stem and leaf treatment of 10 to 20ml mu. In the southern indica rice area, 30 to 40ml of 10% bioxaether suspension plus 30 to 40g of 50% pyrisulfuron dichloroquinolinic acid wettable powder can be used to control barnyard grass, double spike paspalum, rice Lee's grass, sedge and broad-leaved weeds at the 5 to 6 leaf stage of rice in the southern indica rice area.

If a large amount of gold occurs in the field, 10 to 20ml of 10% bioxaether suspension plus 100 to 200ml of 10% cyanofluoxalate emulsifiable concentrate can be sprayed per mu, and the dosage can be appropriately increased when the grass is old. In the fields dominated by barnyard grass and other annual weeds, at the 2 to 5 leaf stage of barnyard grass, 60 to 80ml of pentaflusulfamine oil suspension or 80 to 100ml of 10% oxazolamine emulsifiable concentrate were sprayed with stems and leaves per mu.

To sum up, barnyard grass is the first malignant weed of rice barnyard grass, although it is more difficult to prevent and control, but as long as the timing is grasped and the right method is used, the control effect is still ideal, so we must do a good job in the early stage of closed treatment, combined with stem and leaf treatment, in fact, this is the same as the "two seals and one supplement" mentioned above. Finally, remind everyone that the direct rice field must do a good job of weed closure (whether barnyard grass or other weeds), otherwise weeds will compete with rice for water and fertilizer, glory and space, because weeds have the characteristics of fast growth and reproduction, developed root system, and tall weed plants, etc., in the case of symbiosis with rice, it will inhibit the growth of rice and greatly affect the normal growth of rice.

<> planting rice, it is safe to use an appropriate amount of propanarian herbicide. Barnyard grass 2 leaves to 2 leaves 1 heart stage of pesticide application, 750-1000 ml of 20% emulsifiable concentrate per mu in the south of the seedling field, 1000-1200 ml per mu of the northern seedling field, spray the stems and leaves after 35 kg of water, drain the Yintian water the night before the pesticide is bored, and irrigate the barnyard heart after 1-2 days after the application, but can not submerge the seedlings, and keep the water layer for about 2 days.

1. Propanium can be mixed with a variety of herbicides with empty limbs, which can expand the herbicidal spectrum. 2. Propanium can not be mixed with carbamate pesticides such as sec-butylcarb, isoprocarb, menadicarb and other agents such as malathion, nor can it be mixed with 2,4 drops of butyl ester, and these agents cannot be used 10 days before and after the use of propanail. 3. If there is pesticide damage, you can use Anrongle 3-6ml + Bihu 3-6g + Anfargo 1-2 packets, mixed with water spray.

1. What herbicides can be mixed with propana

1. Under normal circumstances, propanium can be mixed with a variety of herbicides to expand the herbicidal spectrum. However, the agent cannot be mixed with carbamate ester pesticides such as sec-butylcarb, isoprocarb and menacarb and organophosphorus pesticides such as malathion and trichlorfon to avoid drug damage.

2. Within 10 days before and after the crops are sprayed with the aperium, the above agents cannot be sprayed, and it should be noted that the propanil cannot be mixed with 2,4 drops of butyl ester.

3. If there is a pesticide damage, the corresponding remedial measures should be taken immediately, you can use 3-6 ml of Anrongle + 3-6 grams of Bihu + 1-2 packs of Anfargo per mu of farmland, mix 15-30 kg of water, and spray evenly.

Second, the use of propannya

1. Seedling field. 1) When used in the seedling field, the pesticide is generally applied in the 2 leaves to 2 leaves and 1 heart stage of barnyard grass, and 750-1000 ml of 20% dibarium emulsifiable concentrate can be used per mu, mixed with 30-45 kg of water to spray stems and leaves.

2) It is necessary to drain the field water the night before the application, and irrigate the barnyard heart after 1-2 days after the application, but not the seedlings, and the water-retaining layer for 2 days, and then the water can be managed normally.

2. Water seeding field.

When used in the water seeding field, in the main field with barnyard grass, before the 2-leaf stage of barnyard grass, use 1000 ml of 20% dibarium emulsifiable concentrate per mu, mix 30-45 kg of water, spray the stems and leaves, and the water management is the same as the method of seedling field.

3. Transplanting fields.

1) The use of this agent in the transplanting field is generally used in the stage of 1 leaf and 1 heart to 2 leaves and 1 heart of barnyard grass after transplanting or throwing seedlings. The day before use, the field water needs to be drained, and then 1000 ml of 20% dibarium emulsifiable concentrate per mu, mixed with 30-45 kg of water, and sprayed on the stems and leaves.

2) After 2 days of use, you can irrigate the barnyard bucket to the grass heart, pay attention not to submerge the seedlings, and the water-retaining layer for 2 days, and then you can manage the water normally.

1. Rice barnyard grass can be controlled by prochlor, butachlor and benzyl-propyl, benzyl-butyl compound with pyrisulfuron-methyl, benzyl-butyl and other pesticides. 2. When weeding the rice field, it is necessary to pay attention to the water and fertilizer management of Herangzhou in the field, and when using stems and leaves to treat herbicides, it is necessary to drain the water before applying the pesticides. Not only are there many types of barnyard grass, but they are also very resistant, and if a single herbicide is used regularly, the barnyard grass will develop a slippery resistance to the agent.