What is the principle of herbicides killing fish, and can herbicides kill fish in fish ponds

Fish ponds that have been sprayed with herbicides can be used to raise fish.

There are several main fish farming conditions that must be considered before determining the need to raise fish: 1. Fish farming environment.

That is, whether the fish pond in the countryside is convenient, whether there is a water source and power supply nearby, and whether the water quality and water temperature of the aquaculture water are suitable for fish farming.

Second, the supply of natural bait and artificial bait.

<> herbicides can kill fish in fish ponds. Herbicides such as butachlor are highly toxic to fish, do not wash the sprayer in the fish pond after the herbicide, do not throw the empty pesticide bottle near the fish pond, and do not let the residual liquid of the herbicide flow into the fish pond after spraying, otherwise it is fatal to the fish. If the fish in the pond are sure to have been poisoned and the condition is mild, you can change the water or inject new water into the pond, which will have a relieving effect.

How to slaughter grass carp].

There are 3 common ways to slaughter grass carp:

In the first type, the head of the grass carp is directly struck with a knife, knocking it unconscious and slaughtering. This method is common and suitable for small fish, and it is difficult to knock out if the fish is too large. The disadvantage is that there is no bloodletting.

Type 2 Grass carp is directly thrown half to death, and then slaughtered. This practice is suitable for large fish. The disadvantages are: the fish will have internal injuries, the fish meat will have bruises and appear red, and if you are unlucky, you may break the fish gallbladder, and the gains outweigh the losses.

Today, the third method will be introduced by the hotel, which is not only very white and less fishy, but also ensures the freshness of the fish to a greater extent. The specific method is, first of all, cut the tail of the fish and put it in the sink for 15-20 minutes, so that the fish blood will be cleaned, because there can be no bloody picture, simply bring it, everyone understands it.

There is also a way to poke the heart of the fish and bleed, which is difficult for ordinary people to operate, so I will not repeat it here.

After killing the fish, remove the gills, break the belly of the fish, and pull out the whole group of internal organs, and the fish is slaughtered.

Method: 1. Beat the fish head a few times with the back of the knife or a rolling pin, stun it for easy operation, and put it on the cutting board.

2. Scale, use the knife to lift the back oblique to the head of the fish to start scraping the scales, for the larger scales, you can directly buckle them off by hand, relatively fast, the scales at the fin and belly of the fish are not easy to find, you should scrape it carefully, and then rinse the whole fish with water.

3. Dig the internal organs, start to use a knife to draw a depth of about 5 mm at the mouth of the fish at the tail fin of the bottom of the fish, and scratch until it touches the internal organs.

4. Dig your cheeks. Pick out the gills on both sides with your index finger.

5. Remove the fishy line. Clean the fish inside and out; On the front and back, the head and tail of the fish, each draw a knife, and the front and back sides of the limbs are respectively drawn out of the fishy line.

1. Jaw scales: that is, the scales at the junction from the chin to the crotch of the fish. Because the scales of this part are to protect the heart of the fish, they are firmly attached to the skin and flesh, and the scales are small and difficult to find, but they are the main cause of the fishiness after the dish is cooked.

Especially when processing crucian carp and most marine fish, the scales of the jaw must be cut off with a knife.

2. Black clothes in the abdomen: silver carp, crucian carp, carp and other fish have a layer of black clothes in the abdominal cavity, which not only affects the appearance, but also produces a fishy smell, so it must be scraped clean when washing.

3. Intra-abdominal blood tendons: Some fish have a bloody tendon hidden deep in the abdomen and under the vertebrae. When processing, the hood should be burned and broken with a sharp knife and rinsed.

4. Fins: Keeping the fins is for the beauty of the dish, if the fins are scattered and loose, it is counterproductive, and should be properly trimmed or all cut off the skin.

5. Meat stuffy gluten: carp and other fish have a thin and long sour tendon on both sides of the body, which should be removed during processing. After slaughtering and removing the scales, smooth the body of the fish with your hands in the direction from head to tail, and you can see that there is a dark line on the side of the fish, and the sore tendons are just below this line.

Cut a knife at the front of the fish body near the gill cover, you can see the white sour tendons, while pinching the thin tendons with your hands and gently pulling them outward, while patting the fish body with the back of the knife, so that the sour tendons on both sides are pulled out, and then cooked.

Different plants have different susceptibility to the same concentration of auxin solution, dicots are more sensitive to auxin than monocots, while weeds are mainly dicots.

Hello answer, the following three answers are provided for you, please adopt 1, herbicides due to interference or destruction of the normal physiological metabolism of weeds resulting in weed death, the mechanism is more complex, most herbicides of the herbicide is not limited to one, but often several of the results of the joint action.

2. These effects mainly have the following aspects: first, inhibition of photosynthesis, weeds can not produce new nutrients, and after consuming the stored nutrients, they will "starve" to death; The second is to destroy respiration, inhibit the electron transfer and energy transfer in the process of respiration, make respiration a useless consumption, and weeds will eventually die due to lack of energy and various physiological and biochemical processes in the body; The third is to interfere with the action of weed hormones, break the balance of the original weed hormones, disrupt the growth and development of weeds, and cause weeds to be distorted and deformed.

Herbicides are generally divided into two types: biocidal and selective herbicides.

For biocidal herbicides, the principle of weeding is that the pesticide is absorbed by the plant and destroys its growth point cells and dies.

For selective herbicides, it is because different plants have different susceptibility to the same concentration of auxin (or pesticide) solution to weeding, dicots are more sensitive to auxin than monocots, and weeds are mainly dicots.

Hello, the following three answers are provided for you, please 1. The herbicide causes the death of weeds due to interfering with or destroying the normal physiological metabolism of weeds, and its mechanism is more complex, and the herbicidal effect of most herbicides is not limited to one, but is often the result of several joint effects. 2. These effects mainly have the following aspects: first, inhibition of photosynthesis, weeds can not produce new nutrients, and after consuming the stored nutrients, they will "starve" to death; The second is to destroy respiration, inhibit the electron transfer and energy transfer in the process of respiration, make respiration a useless consumption, and weeds will eventually die due to lack of energy and various physiological and biochemical processes in the body; The third is to interfere with the action of weed hormones, break the balance of the original weed hormones, disrupt the growth and development of weeds, and cause weeds to be distorted and deformed.

Hello answer, the following three answers are provided for you, please adopt 1, herbicides due to interference or destruction of the normal physiological metabolism of weeds resulting in weed death, the mechanism is more complex, most herbicides of the herbicide is not limited to one, but often several of the results of the joint action.

2. These effects mainly have the following aspects: first, inhibition of photosynthesis, weeds can not produce new nutrients, and after consuming the stored nutrients, they will "starve" to death; The second is to destroy respiration, inhibit the electron transfer and energy transfer in the process of respiration, make respiration a useless consumption, and weeds will eventually die due to lack of energy and various physiological and biochemical processes in the body; The third is to interfere with the action of weed hormones, break the balance of the original weed hormones, disrupt the growth and development of weeds, and cause weeds to be distorted and deformed.

The principle of action of herbicides is based on the different responses of monocots and dicots to the same concentration of auxin, that is, at a certain concentration, it may promote the growth of monocots, but it will inhibit the growth of dicots, thereby killing dicots. In turn, monocot growth is inhibited when dicotyledonous growth is promoted. These are all knowledge from high school biology textbooks, hehehe.