CATDOLL : CATDOLL: Why are there so many flies?

1. Why are there so many flies?

In fact, as a member of the biological family, they are all useful.

Flies: Fly farming has become a big name, and there are breeding companies, etc. There is also a "China Fly Network" that specializes in fly farming. Fly maggots can be fed directly to fish and can be used as a high-protein supplement in feed.

In addition, we can study the disease resistance of flies and mosquitoes and make use of it; study the secret of how flies can convert almost unusable food into protein, etc.

2. What are the four major pests?

The four major pests are: mosquitoes, rats, locusts and cockroaches. Mosquitoes and rats can spread diseases, locusts destroy crops, and cockroaches are too strong. They are always wandering around in our kitchens, which is really annoying. People always think that flies are pests. To be honest, they are indeed annoying, but in nature's ecosystem, they play an important role—decomposers.

3. Where can I learn the technology of fly breeding? I am currently in Ningbo, Zhejiang.

Fly maggots are rich in nutrients, their amino acid pattern is higher than the reference pattern, and they have high nutritional value[1]. They also have a high reproduction rate and a short cycle, which can improve the comprehensive utilization rate of feces and are an effective way to obtain animal protein[2]. However, the key technologies in each link of fly maggot farming must be mastered, otherwise the yield and quality of fly maggots will be affected. This paper discusses the problems encountered and solutions taken in the implementation of the project "Integrated Demonstration of Feces Harmless Treatment and Fly Maggot and Earthworm Farming Technology", hoping to provide some help to fly maggot farmers.

1. The construction of the fly house is unreasonable

When building fly houses, many farmers do not consider local climate, humidity, temperature, lighting and other conditions, and build them blindly, resulting in unrealistic construction sites, inability to adjust the temperature or high costs. They can only rely on short periods of high temperature in summer and autumn for production, and have low utilization rates.

Countermeasures: When building a maggot breeding room, the local climate conditions should be taken into consideration. According to the biological characteristics of flies, attention should be paid to how to adjust the temperature and humidity of the fly room after changes, and sufficient light should be ensured. The area of ​​the fly breeding room should not be too large, otherwise it will easily cause the room to be uninsulated or the cost of regulating the temperature to be too high [3]. The fly room should also have good ventilation conditions.

2. Flies do not lay eggs or lay very few eggs

During fly breeding, it is often found that the breeding flies always stay in places with strong light, are not active frequently, are unwilling to eat, and do not lay eggs or lay very few eggs. The main reasons for this phenomenon are: first, environmental factors. The temperature difference between morning and evening is large, climate change leads to low temperatures, and there are no temperature control facilities; the indoor light is too dark, the lighting rate is low, and the ventilation conditions are poor. Second, sanitary conditions. There are odors in the breeding room that flies don’t like, the food tray and sponge are not cleaned to produce odors, the food fed to flies is spoiled, the manure is not fresh or fermented too much, the egg collection material is not fresh, and the breeder smokes in the fly maggot room. Third, the breeder has a high frequency of activities in the breeding room and often disturbs the flies. Fourth, the number of breeding flies is small, the breeding flies are not replenished in time, there are too many male flies, and the breeding flies are degenerated [4]. The above problems are all direct causes of low egg production and effective measures should be taken to solve them.

Countermeasures: The temperature in the breeding room should be relatively stable and suitable for the growth of breeding flies. Generally, the temperature around 27 ℃ is most suitable for fly growth. Indoor lighting and ventilation conditions should be good, and the lighting time should be extended. Pay attention to the hygiene in the breeding room, remove dead flies in the cage in time, eliminate odors, clean the food tray and sponge frequently, replace the sponge once every 15 days, and feed flies with fresh food every day. The egg-collecting material should be prepared and used immediately. Smoking is strictly prohibited in the breeding room. Breeders or visitors should walk gently when entering the breeding room, and it is strictly prohibited to scare flies. Replenish breeding flies in time to ensure the number of breeding flies. To prevent the degeneration of breeding flies, take out maggots from different fly cages, mix them and grow them into pupae, and then put them into fly cages to supplement fly species. After feeding the breeding flies for a period of time, the breeding flies should be replaced or re-tamed. Ensure sufficient feed and drinking water, the feces are thoroughly fermented and odorless, and the egg-collecting material should be fresh.

3. Young maggots easily crawl out of the dung pile and are unwilling to stay on the dung.

During the breeding process, it is often found that the young maggots that have just hatched from the fly eggs should eat in the manure, but they always gather in groups and stay on the surface of the manure, crawling back and forth, and are unwilling to drill into the manure pile to eat food. The main reasons are: the temperature in the manure is too low. When the temperature of the manure is below 27 ℃, it is difficult for the maggots to absorb nutrients in the manure. The manure is not fresh or fermented too much. After entering the fly maggot room, it will no longer ferment. The temperature in the manure is too low, and the maggots cannot absorb nutrients in the manure in the manure pile. The maggots have to drill out of the manure pile collectively to find food.

Countermeasures: Increase the temperature in the breeding room and pay attention to temperature regulation. The temperature difference between morning and evening should not be too large. The manure should be thoroughly fermented and odorless. Some straw should be added to the manure to ensure its air permeability. The fermented manure should not be piled for too long. It should be taken out in time to ensure the freshness of the manure. The manure in the breeding pond should be replenished or replaced frequently. Pay attention to the humidity of the manure. If the humidity is too low, water it in time. If it is too high, add material to lower it [5].

4. Maggots are not collected in fly collection bins

According to the physiological characteristics of fly maggots, when they grow up and mature, they will crawl out of the dung pile to pupate. After crawling out of the dung pile, the fly maggots will be blocked by the wall of the maggot breeding pool and will move along the wall to both sides. When they are close to the maggot collection bucket, they will climb up along the small slope beside the bucket. When they just climb to the maggot collection bucket, they will fall into the maggot collection bucket. This is the principle of automatic separation of fly maggots. However, it is often found that the separation is not clean during the breeding process, and many fly maggots pupate in the dung. The main reasons are: first, the temperature in the breeding room is too low and the temperature in the dung is high. If the temperature in the breeding room is too low, it is not conducive to the growth and activity of fly maggots, while the temperature in the dung pile is high. When the fly maggots crawl out, they immediately feel that the temperature outside is not conducive to pupation, so they have to pupate in the dung pile [6-7]. The dung pile for breeding was too big, and the maggots next to it separated automatically. The maggots living in the middle of the dung pile had been crawling for a long time but still could not crawl out of the dung. They had no eyes and thought the dung pile was endless. It was futile to crawl, so they had to pupate in the dung pile. The third problem was that there was not enough passage for the maggots to move around on the side of the maggot breeding pond.

Countermeasures: To ensure that the maggots enter the maggot collection barrel, the temperature in the breeding room should be above 25 ℃, the feces in the maggot breeding pool should not be piled up too much, and enough space should be left around the maggot breeding area for the maggots to crawl out of the feces pile after they grow up. If there is any scattered feces, it should be cleaned up in time.

It is better to learn how to raise flies online. If you go to other bases, you usually have to pay tuition fees. The main reason is that the market for flies is not open yet. I am also learning it online. I have learned the basics. After watching a lot, I think it is necessary to develop chain farms and recycling to have room for development.