How to apply pesticides to rice fields where fish are raised?

These pesticides should be sprayed on the leaves of the rice field, or these pesticides should be poured directly on the roots of the rice field, or some solid pesticides can be used, and then slowly released. When applying pesticides to rice fields, do not spray them in areas with many fish, so as not to let the fish eat them by mistake.

When spraying pesticides, you must choose when there are no fish, only in this way will not harm the fish in the pond and will not cause fish death.

The first thing is to choose the right pesticide, and the effect is not too great, and at the same time, when spraying pesticides, it must be far away from the base of fish farming, and then you also need to pay attention to the wind direction, and then you must add water to dilute.

1. Correct selection of high-efficiency and low-toxicity pesticides When applying pesticides for fish and shrimp farming in rice fields, high-efficiency, low-toxicity, residue-free and pollution-free drugs must be selected. At present, there are many varieties of pesticides used in rice planting, and more toxic pesticides should not be used, such as difenthion, hexahexa.

6. Lindane, toxaphene, DDT, calomel, mercurous nitrate, mercury acetate, carbofuran, sodium pentachlorophenol, malachite green, etc. are not used. When treating insects, you can choose insecticidal doubles, trichlorfon, ammonium thion, etc.; It is advisable to use carbendazim, rice blast, leafhopper powder, Jinggangmycin and other high-efficiency and low-toxicity pesticides, which is not only beneficial to the quality and safety of rice, but also very beneficial to the quality and safety of aquatic products produced by rice fields. 2. Do a good job of preparing for pesticide application In order to reduce the impact of pesticide application on fish and shrimp in paddy fields, before pesticide application, the field water should be appropriately deepened to 7 10 cm, or the micro-flowing water state of the water at the edge of the paddy field should be maintained to reduce the drug concentration in the paddy water during pesticide application.

If the rice disease is very serious, it is necessary to apply highly toxic pesticides, or the needs of rice root pests, you can reduce the water level in the field before application, drive the fish and shrimp to the fish ditch and fish letter, and continue to flush the water convection to keep the fish ditch and fish letter with sufficient dissolved oxygen. If the number of fish and shrimp is large or large, and the fish ditch and fish letter cannot be accommodated, the fish can be transferred to other water bodies or cages for temporary rearing, and when the rice diseases and pests are controlled, new water will be injected again, and then the fish and shrimp can be returned to the original rice field for breeding.

Fish farming in rice fields requires sufficient and stable water sources in order to raise fish well. It is recommended to raise grass carp for fish farming in rice fields. Carp.

Rice management requires manual effort. Pesticide fertilization has a certain impact on fishery. The reason why we don't have fish farming in the rice fields here is that it's too hot here, and the other careful management is not good.

Fish farming in paddy fields should be dominated by rice, and fish farming should be carried out at the same time, so as to achieve the goal of increasing rice production and harvesting fish. Grass carp is the main fish culture in the paddy fields, and some carp and Nile tilapia should be allocated according to local conditions. Grass carp is a typical herbivorous fish, but also a typical omnivorous fish, when there are suitable animal food, eat animal first, and then eat forage, mainly higher aquatic plants.

There are dozens of common weeds in paddy fields, among which the stems and leaves of black algae, bitter grass, small algae, grass, snow wild vegetables, astringent grass, shallow reeds, grasses, and flooded terrestrial higher plants are the favorite natural bait of grass carp. However, when there is no food-loving forage, other aquatic plants can be eaten. This is known as force-fed forage.

In addition, the commercial feed grass carp is also very happy. In the juvenile stage, the saplings live entirely on animal feed, and the saplings about 1 cm in length feed mainly on the larvae of small plankton and small aquatic insects, and gradually shift to herbivorous when they reach the river flower fingerlings. The main food composition in the intestine accounts for about 50% of aquatic plants, and about 40% of aquatic animals and insects.

The summerflower grass carp that eats bloodworms (crusts) grows quickly, with a daily weight growth rate of about 14%, duckweed at about 8%, and bean cake at the slowest rate of 5%. Over time, grass carp grow, weeds grow, are eaten by grass carp, and their weeding is often thorough. Putting 2 grass carp per square meter can control the growth of weeds, so there is no need for manual weeding and feeding.

The ** rate of grass carp is more than 90%, the yield per mu is less than 40 kg, and the survival rate and yield per mu of grass carp are higher than those of other fish. Grass carp in rice paddies do not get sick easily. Rice and fish farming is of great significance to the epidemic prevention of farmed fish.

The paddy field environment provides a good living environment for grass carp.

Grass carp eat abundant and fresh bait in the transparent and shallow water layer of rice field, and the rice absorbs fertilizer, purifies the water quality, and injects water into the rice field to renew the water quality, with low organic matter content and relatively stable dissolved oxygen. The density of fish is relatively small, and grass carp live in this natural environment, so the physique is strong and the meat is fresh! Fish farming in pollution-free rice fields can not only create a good rice harvest, but also make full use of the water area of the rice field, pests, insects, etc. for fish farming.

Comprehensive utilization of all the lung energy of rice in paddy fields, while developing production and improving production efficiency, high-efficiency and low-toxicity pesticides can be used, and existing live bait organisms can also be used to produce high-quality pollution-free fish under conditions such as artificial cooperative feed and biological insect control.

The general principle is "base fertilizer, top dressing supplemented, farmhouse fertilizer, less chemical fertilizer". Although farm fertilizers and chemical fertilizers are not too toxic to fish, the deterioration of water quality when fertilizing at high temperatures will inevitably affect the growth of fish. Therefore, the general method is to apply plantar fertilizer first, and then put the fry a few days later, when you need to top dressing, the amount of water should be sufficient, keep the water layer 15 cm deep, and at the same time, the fertilizer applied each time can not be too much, and it should be mastered within a certain amount.

If you do need to apply a lot of fertilizer, you need to direct the fish to a ditch or other safe place to bring it back when the water quality improves.

1. Fertilization technology: Fertilizer should not be sprinkled in places where fish are concentrated, such as fish pits and fish ditches, so as to avoid accidental ingestion by fish.

<> the carp stockings stocked in the rice fields, because the individual is small, it is easy to be attacked by predators and the yield is low, so it is very important to prevent and eliminate predators.

1) Water centipede, which mainly feeds on fish species. 1 month before the fingerlings are stocked, 60 kg of tea bran should be applied per mu to kill water centipedes. If water borers are found during the release period, the crucian carp and water centipede can be fished into the cage together, and an appropriate amount of kerosene can be sprinkled to make the water centipede suffocate and die after touching the kerosene.

2) Tiger striped frogs, devouring crucian carp and fish feed. Half a month before the fry are stocked, 20 kg of lime should be applied per mu to kill all tiger frog tadpoles.

3) Water snake, which devours crucian carp. It can be caught by snake traps, bamboo cages, or manually killed in the hot and humid evening, while the water snake is in the shallow water to cool and feed.

4) Turtles, devouring crucian carp. 50-60 grams of crystal trichlorfon per 100 cubic meters of paddy field water, and the whole field is sprinkled after the medicine is dissolved in an appropriate amount of water, and the control effect is ideal.

5) Lake indigo, a cyanobacteria, this algae because of the colloidal membrane, crucian carp can not digest after ingestion, and after the death of this algae, sink at the bottom of the ditch to decompose and produce toxic substances, which will make the fish die. Each cubic meter of paddy field water can be sprinkled in the fish ditch with grams of copper sulfate solution cover in an appropriate amount of water to kill the indigo.

Key points of rice and fish farming technology:

1. The stocking species of rice field fish farming are suitable for herbivorous and omnivorous fish, such as grass carp, carp, crucian carp, tilapia, etc. Bighead carp can be stocked, but bream should not be stocked.

2. Rice-fish rotation, feeding and feeding, 100 120 grass carp fingerlings, 150 200 carp and crucian carp, 30 50 silver carp, 10 20 bighead carp per mu, and 200 250 kg per mu can be produced. The stocking time should be early, and the single-season rice field fish or rice-fish continuous cropping and edible fish should be stocked after the seedlings are transplanted and returned to green. Rice-fish rotation can be used to irrigate the fish immediately after the rice is harvested and catch fish before transplanting the rice in the following year.

3. Fish fertilization in paddy fields is mainly farmhouse fertilizer and base fertilizer. The use of chemical fertilizers should be controlled at a safe concentration, so as to avoid sprinkling directly into the fish ditch, and it can also be applied in rotation in half a field and half a field.

4. Before applying pesticides, the fish ditch should be dredged and the water level should be deepened. The emulsion pesticide dew is sprayed after drying, and the powder is sprayed with dew to reduce the amount of medicine falling into the water. It can also be sprayed in turn in half a field and half a field. If you notice that the fish is unwell, fill it with new water immediately.

Benefits of Fish Farming in Rice Fields

Fish farming in paddy fields can promote rice production. Rice and fish farming is a kind of connotation expansion reproduction, which is the reuse of national land resources, and can produce aquatic products without additional occupation of cultivated land. Local experience shows that the development of fish farming in paddy fields will not only not affect rice production, but will also promote the increase of rice production.

Rice fields with fish farming can generally increase rice yield by 5-10%, and higher yields can increase by 14-24%.

Rice and fish farming can increase aquatic products for the society and enrich people's "vegetable basket". In recent years, in Jiangsu, Sichuan, Guizhou and other places, rice and fish farming has become one of the main ways of local aquaculture.

Rice field fish farming can achieve a balanced market, which plays an important role in stabilizing aquatic products, stabilizing the market, meeting the needs of "vegetable baskets", and improving people's dietary structure. Especially in some areas where water resources are scarce and traffic is blocked, the development of rice and fish farming, local production, and local sales has effectively solved the long-term problem of "difficulty in eating fish" in these areas.

Because the rice field is relatively large, there is more water, when you spray pesticides, most of the pesticides are sprayed on the leaves of the rice, the leaking pesticides will be diluted by the water in the rice field, and then it will be diluted more when it rains, and the trace amount of pesticides will definitely be toxic, but there will be no obvious poisoning reaction, and it will not meet the poisoning standard, so it is okay.

The selection of pesticides is particular, and the selection of high-efficiency broad-spectrum biological agents and insecticide of harmless pesticides for fish.

Definitely not, there is water in the rice fields, the fish are in the water, and the pesticides are neutralized with the water! So it's not toxic at all.

It depends on what kind of pesticide it is and to what extent it is diluted. Whether it is toxic to fish is indicated on the instructions.

Since we know that fish are raised in rice fields, in the choice of pesticides, farmers will definitely choose pesticides that are non-toxic or very low-toxic to fish, otherwise they will not need to raise them.

Under the condition of using non-toxic and low-toxicity pesticides, even if the fish will absorb some pesticides into the body, these pesticides will not stay in the body of the fish in stone, it will be degraded somewhat. Therefore, as long as the rational use of drugs is ensured and the safety interval of pesticides is strictly observed, there will not be many pesticide residues in the fish.

In fact, rice and fish farming also have the function of controlling pests, after all, fish will also eat insects, so the pests in rice fields will be less than those without fish, so as to reduce the use of pesticides.

1. Paddy field engineering construction;

2. The selection of breeding species, the stocking specifications of fish fingerlings, the determination of stocking amounts, etc.;

3. Water quality regulation and management;

4. Scientific feeding management;

5. Daily management.

Rice and fish farming should be based on rice, taking into account fish farming. This guiding ideology is based on the theory of rice-fish symbiosis, and the artificial new rice-fish symbiosis relationship is used to transform the original rice field ecology into a more favorable direction, so as to achieve the purpose of increasing rice production and fish harvest. According to the guiding ideology of promoting rice production and fish farming, we believe that grass carp (50%-70%) should be the main fish culture in paddy fields, with some carp and Nile tilapia according to local conditions.

It is necessary to solve the problems of hygiene, environment, water quality, feed and geographical location. Because these problems are very important to farmers, we must pay attention to this aspect when raising fish in rice fields.

The depth of the water, the type of rice field, the variety of fish, the food that the fish eat, the temperature of the water, the air, the time of light.

Rice and fish farming should solve the problems of water quality of rice fields, water depth of rice fields, fish types, light, and temperature.