CATDOLL : CATDOLL: Why did silkworms die in large numbers?

1. Why do silkworms die in large numbers?

There are three main reasons for silkworm death:

1. Temperature reasons: the growth temperature is 7-40℃, and the optimum temperature for breeding is 20-30℃. Too low temperature will lead to death.

2. Causes of the disease: infectious diseases or parasitic pests.

3. Chemical death: silkworms die of poisoning due to the abuse of pesticides.

2. What should we do if earthworms die on a large scale?

Causes and countermeasures of mass death of earthworms:

1. Earthworm poisoning

There are two reasons for earthworm poisoning: one is chemical pollution. If the earthworm bed or container is polluted by pesticides, fertilizers, chemicals, etc., the earthworms will be poisoned, the mucus secretion will increase, the earthworm body will bend in spasms, become thicker and shorter, and the segments will be

The first is redness and swelling, followed by death; the second is protein poisoning. This is mainly caused by excessive protein in the earthworm feed, such as feeding with high nitrogen content of slop, pig and poultry manure, etc., or insufficient fermentation. The symptoms are curled, deformed, weak peristalsis, local swelling or necrosis.

Prevention and control methods: For chemical poisoning, just evacuate the pollutants in time, or quickly relocate the earthworms to minimize production losses; to avoid protein poisoning, it is necessary to mix rice straw, wheat straw, rotten leaves, etc. with high-nitrogen feed and fully ferment it.

2. Earthworms lack oxygen

The reasons for earthworm hypoxia are: ① Livestock and poultry manure and other feeds must be completely fermented, producing a large amount of harmful gases such as ammonia and alkanes, which will cause earthworms to die like electric shock after contact. ② Thunderstorms or excessive shallow water make the environment too humid, resulting in obstruction of the breathing of the earthworms' pores on the surface of the skin, resulting in suffocation and death. ③ Winter management does not handle the relationship between insulation and ventilation well. In production, it is common for some earthworm farmers to cover the earthworm beds too tightly with several layers of plastic film, which cannot effectively ventilate. Under hypoxic conditions, earthworms are dark brown and dull, weak, slow in movement, and their offspring are poorly developed.

Prevention and control methods: It takes about 30 days for livestock and poultry manure to compost and ferment. Rotten fruits and vegetables, waste residue, etc. should also be fermented. Pay attention to keeping the soil moist and keep the humidity at around 30%. In order to solve the relationship between ventilation and insulation under low temperature conditions, you can tie bundles of straw in the earthworm bed, and then pass through the plastic film for ventilation, or put a straw mat under the plastic film, which should be opened for ventilation in the afternoon when there is no wind and the weather is warm.

3. What caused the large-scale death of tadpoles?

I don't know where you are, but if it's very hot and the water area is small, you can first take measures to shade. This is related to the environment and water quality, but in this case, you need to take emergency measures. 1. Clean up dead tadpoles in time.

2 Reduce the amount of feed fed. You can feed it once every other day, but make sure it is small.

3. If you don’t know the size of your water area, you can purchase an oxygen pump to provide 24-hour oxygen supply based on the size.

4. Replace half of the old water and inject new water (not tap water will do).

5. Go to a drugstore (a larger veterinary drugstore, or a store that sells goldfish) to buy water-soluble oxytetracycline and add the appropriate amount.

If the death is under control after doing the above, divide the pond immediately. It is probably related to the excessive density.

4. Why did the high temperature in Liaoning cause large-scale death of sea cucumbers?

Recently, many places in Liaoning have been experiencing continuous high temperatures, with the highest temperature in some areas even exceeding 40 degrees Celsius. The rare high temperature has caused a large number of deaths of sea cucumbers in the breeding ponds. This season is when sea cucumbers hibernate. In a sea cucumber breeding pond in Dalian, some dead sea cucumbers have floated on the water due to the continuous high temperature. Sea cucumbers are afraid of high temperatures, but not cold ones. Once the temperature is high, they will turn into sticky water little by little.

According to the marine fishery department, sea cucumbers in the dormant season have low resistance. Once the water temperature exceeds 30 degrees, the chances of molting and dying will greatly increase. Most sea cucumbers farmed in Liaoning seawater ponds began to show various bad symptoms on July 23, such as falling to the bottom, laying in strips, lack of oxygen, molting, falling off the reef, etc. As the temperature continued to rise, by July 28, the pond water temperature reached more than 30 degrees, and a large number of sea cucumbers died in the breeding ponds within 7 meters in the province.

According to preliminary statistics from the Liaoning Provincial Department of Oceans and Fisheries, the affected area of ​​sea cucumbers in Liaoning Province is 950,000 mu, and the loss of production is 68,000 tons. At present, farmers are carrying out rescue salvage of sea cucumbers. In addition, the fishery department has organized aquatic experts to conduct in-depth investigations on the front line, guide production, organize professional and technical personnel to help farmers control water temperature, and sterilize ponds where sea cucumbers have died.

5. What is the reason for the large-scale death of purple-leaf plum trees?

Hello, there are generally two situations when large-scale death occurs: 1. The soil ball is scattered when the seedlings are removed, the root system is injured and lacks water for too long, or the seedlings are removed without the soil ball.

6. Will rabbits die in large numbers if they eat grapefruit?

No, rabbits can eat grapefruit flesh. Grapefruit is rich in vitamins, such as vitamin C, vitamin B1, B2, vitamin P, etc. It also contains minerals such as phosphorus, zinc, potassium, and selenium. When feeding rabbits, be careful to remove the grapefruit seeds to avoid foreign body pneumonia in rabbits. Rabbits should still be fed with rabbit food on a daily basis. Feeding them with grapefruit alone will cause malnutrition.

7. Why are my Australian wintersweets dying and withering in large numbers?

There are many reasons for the mass death of Australian wintersweets. Too much watering, too much fertilizer, diseases and insect pests are all possible. Only by finding the root cause can the problem of Australian wintersweets' death be solved. To grow Australian wintersweets well, you must first understand its habits and then take action.

8. What chemicals release gases that can cause large-scale plant death?

The options are "Granoxone + glyphosate" and "radioactive gas from atomic bomb explosion".

9. Friends who raise chickens, what is the problem when large-scale deaths of chickens occur?

When this happens, there are two aspects to consider: 1. Feed poisoning.

2. Infectious diseases occur in chickens.

Therefore, it is necessary to report to the Animal Husbandry and Veterinary Station and ask them to send professional personnel to the scene for diagnosis and treatment.

10. What’s the reason for the large-scale death of yellow croaker?

The large-scale death of yellow croakers proves that the water quality here is seriously polluted. You need to call the relevant department and ask them to check it out. Protecting the environment is everyone's responsibility.