What are the manifestations of rice herbicide damage? What do you know?

Preface: Sprayed with herbicides, generally after 5 10 days will appear yellowing brown spots, serious will have yellow roots and white roots less with hands to bring up the phenomenon of seedlings, and the new leaves are short and narrow, uneven growth, high and low. If you want to remedy, you need to use 40 kilograms of potassium chloride, 12 kilograms of urea, and add granular zinc fertilizer to mix together and sprinkle it into the rice field.

The rice herbicide is generally better in the 2 3 periods of rice, for special weeds can be sprayed on the weeds, hot and dry season, the weather is too dry, try not to sprinkle pesticides at this time, it is best to use herbicides in sunny and windless weather, at this time the sun is sufficient to help the herbicide volatilize, windless weather can prevent herbicides from blowing on crops due to the wind. After being damaged by herbicides, the growth of rice will be inhibited, and the phenomenon of slow growth will appear, so antidote can be selected to reduce the damage. <>

When the crops next to us are unfortunately damaged when spraying herbicides, we should rinse the rice with clean water to reduce the amount of herbicide residues on it. In the biological season, fertilizers also need to be appropriately increased, such as urea, which can quickly make rice develop faster. Rice will have common symptoms such as brown spots, yellow spots, blight, net spots, etc., and crops are also very sensitive to herbicides, so we should pay attention to avoid crop damage when spraying.

When crops are damaged by paraquat, there will be a large number of wounds, no grain filling, and dead ears, so according to national regulations, paraquat will be discontinued in China. There are many kinds of rice deformed by the critical situation, the common situation is leaf rolling, clumping, deformed panicle and other conditions, by the herbicide damage, the speed of liquid will become very slow, the stem will become very thin, so the growth will naturally be slow, at this time we need to use dichloroquinolic acid to prevent rice from being damaged.

Crops will be affected, crops will wilt, no animals will appear, no reptiles will appear, crops will not continue to grow. My understanding is that when there is a pesticide damage, the crops will stop growing, and it will also harm the yield of the crops, and it will also harm the land.

There will be wilting, it will also lead to brown spots, and there will also be reticular spots, the leaves will also fall off a lot, the plant will be very sensitive, affecting the yield of crops, and there will be residues of pesticides.

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.

It can be determined according to the growth of the plant, but also according to the condition of the land, if the land has a serious problem with clumping, the rice has stagnant growth, spots have appeared, there is a problem.

1. Judging from the application period and pesticide amount: if the time of pesticide application to control pests and diseases is 1 2 days after rice seedling planting (throwing), it is more sensitive, and sometimes pesticide damage occurs. High doses of individual pesticide products are also prone to pesticide damage.

2. Check the fertilizer water and soil conditions: irrigation after medicine is too deep (submerged growth point), which is easy to produce pesticide damage. Check whether the plants have poor growth symptoms due to improper fertilization or application of unrotted organic fertilizer, or improper cultivation of grass straw and green manure.

The first is that the leaves are yellow, and the second is that when the rice is growing, the development is abnormal, it does not head when it should be headed, and it cannot bloom when it should bloom, and the growth is slow.

It can be judged by the composition of the herbicide, by the efficacy of the herbicide, and by the way the herbicide is used.

It is necessary to judge according to the ingredients on the herbicide, and then it can also be judged according to the use time of the herbicide, as well as the concentration of the herbicide, and then you also need to have this knowledge.