2. Zinc phosphide (Zn3p2): It is a gray powder with obvious garlic smell, insoluble in water and lipophilic. It is stable when it is dry, slowly decomposes when it is wet, and quickly reacts with inorganic strong acid to release phosphine gas. It mainly acts on the nervous system and destroys metabolism. After poisoning, appetite decreases, activity decreases, hind limbs are often paralyzed, and finally they die. It acts quickly and is a quick-acting medicine. The concentration of prepared bait is generally 2% ~ 5%. The toxicity selectivity of this product is not strong, and the toxicity to human, poultry and livestock is similar to that to rats, so attention should be paid to safety. Mice that are not dead after the first poisoning are easy to refuse to eat when they meet again, and are not suitable for further use.
Because of the low dosage of rodenticide, good palatability, poison bait is easily accepted by rats, and its effect is slow, and it does not cause protective reaction, and the effect is generally good. However, the feeding amount must greatly exceed the acute bait, and the feeding period should not be shorter than 5 days. The chronic toxicity of rodenticide to Rattus norvegicus is very strong, but it is slightly weak to Rattus norvegicus and Rattus flavipectus. Among poultry and livestock, cats and pigs are more sensitive, and chickens, ducks and cows have strong endurance. Generally speaking, it is one of the safest rodenticides at present.
The concentration of rodenticide is 0.025%. Because the dosage is small, the pure medicine is usually diluted to 0.5% or 2.5% mother powder or mixed with sodium salt solution with appropriate concentration, and then added to bait to make poison bait.
2. Baits and additives In addition to rodenticide, the quality of bait also directly affects the effect, so be sure to choose mice that you like to eat. There are several types of bait used to kill rats on a large scale:
Whole grains or fragments, such as wheat, rice, naked oats, sorghum, broken corn, etc. ;
② Grain flour, such as corn flour and flour, is mainly used to make mixed bait. Generally, 60% ~ 80% corn flour and 20% ~ 40% flour can be used;
(3) melons and vegetables, such as sweet potato slices and carrot slices, are mainly used to make poison bait, and now they are available.
3. Preparation of poison bait In order to ensure the quality, poison bait should be prepared centrally, which is strictly required from three aspects:
(1) rodenticide, bait adhesive, etc. Must meet the standards;
(2) evenly mixing the bait, so that the rodenticide and the bait are evenly mixed; When using highly toxic rodenticide, it should be prepared into mother liquor or mother liquor with appropriate concentration before mixing with bait. The drug content of mother powder and mother liquor must be accurate;
③ The concentration of rodenticide is moderate, neither too low nor too high. Too high affects palatability, but reduces rodent control effect. For chronic drugs, increasing the concentration does not accelerate the onset of action accordingly.
4. Putting poison bait It is best to put poison bait by trained personnel. The delivery method is as follows:
① hole feeding: suitable for rats with obvious holes;
(2) According to the rat trail: it is not easy to find rat holes in most areas, but the activity place is easy to determine, so this method can be used for drug administration;
(3) equidistant release: eliminate the wild rats in the open area, and put a bunch of poisonous baits at a certain distance in each row and column according to the chessboard mode;
(4) Unified release: generally limited to wild rats, suitable for places with high rat density, vast territory and sparse population;
⑤ Strip application: Apply drugs in a straight line at regular intervals to kill wild rats.
Bait can be released at night and collected during the day to avoid accidental injury to children, birds and animals; The method of poison bait box can also be used. The poison bait box can be made from local materials and adapted to the time. Generally, the bait box should not be placed for more than 5 days. If there are no mice in it for more than 5 days, you should change your position. When killing house mice, each household can put one or two poison bait boxes, but the location should be suitable, and fresh poison bait should be replenished in time when it is first used. After the rat density drops, check it once a month to ensure safety.
Extended data
Diesel deratization
Mix butter, engine oil and diesel oil and put them around the mouse hole. When the mouse sticks to oil, it is easy to stick to dust and feel uncomfortable. They licked it with their mouths. After diesel oil enters the stomach with the digestive tract, it corrodes the stomach and kills them.
Use ammonia to kill rats.
Fill the rat hole with ammonia 1- 1.5 kg, and immediately block the hole. Its smell can kill mice. Poison the mouse hole with ammonia, and the mouse will not dare to enter it for a year.
Bleaching powder to kill rats
After finding the rat hole, seal the back hole, put 20g of bleaching powder into the front hole, and then pour a proper amount of water into the hole to seal the hole quickly. When bleaching powder meets water, chlorine gas will be produced, which will poison the mice in the hole.
Methamidophos kills mice.
0.5- 1 kg of rice, soybean, wheat and other grains are mixed with 25 grams of methamidophos, and after 5 minutes, when the grains are filled with liquid medicine, they are distributed in fields or places where rats are infested. Because the smell of methamidophos is similar to dried radish slices, mice like to eat it, and the poisoning effect is good, but this medicine should not be placed in the places where livestock and poultry come and go at home to avoid poisoning.
Super glue can kill mice.
The mouse stuck on it can't move and will starve to death. Super glue is safe, nontoxic and cheap.
If you don't know where the mouse died after taking rat poison, you can borrow a dog from your neighbor, preferably where you can see it, so that you can find it and change it regularly.
References:
Baidu encyclopedia-deratization