The two-toothed cocoon is the main species that has a wide distribution and a large number of breeds in China. However, due to the lack of understanding of its livelihood and reproductive habits, many breeders are often misunderstood and thus result in counterproductive results. Even reduced production, or even no income. Here are some points that should be noted for the main problems that exist: 1. What should I do if there are no seedlings and seedlings? The codling of the codlings has only one breeding period in a year and it has its special breeding habits. I do not understand this. At one point, even with a large amount of germplasm resources, it is difficult to obtain high-quality seeds and seedlings. The first is that during its reproduction, it changed its life habits inhabiting the earth and left the caves, flocks of water, mating and breeding. At this time, the shape of the animal is also changed and becomes a short and wide "heteromorphous body". Only when the sexual product is fully mature, otherwise, even if artificial mating is performed, it is difficult to achieve success. Based on this, it is best to collect broodstock (species) on the night of their "group marriage." Lights are baited for fishing. Even though they can be harvested in the morning, many have already been produced and it is difficult to achieve practical results. If preparation is to be made in advance, arrangements should be made prior to sexual metamorphosis to facilitate rest and reinforcement. The method of adopting (raising) seedlings is also relatively simple. The first is to use natural broodstock to put it in the pond and allow it to reproduce on its own. Then it is to select mature broods to carry out artificial seedling collection (the method is slightly similar to that of shrimp and crab breeding), but it should be noted that Due to the high loss rate of the genus Bombyx bait, the seeding and seedling density should be greatly increased. At present, the general seeding amount is about 5kg/mu~10kg/mu, and the seedling volume is also 100,000/mu. Left and right (such as the amount of large seedlings for more than 10 rigid sections can be reduced), otherwise it is difficult to increase the yield, the economic efficiency will be low. Second, what kind of place can we raise good double-surrounded silkworm? There are two issues that must be paid attention to here. One is the condition of the pond. Although it is not necessary to build a standard fish and shrimp breeding pond for a deep ditch dam, at least it must be able to block the tide. To the top of the small embankment, because once flooded, the silkworm will escape out of the hole, and then into the enemy of harmful organisms, will seriously affect the survival of sandworm. At the same time, attention should be paid to water and soil conditions. Although the requirements for water and soil conditions are not high, the double-toothed cocoon should also choose the ideal seawater with low salinity. The cultivated cocoon has a softer constitution and has a higher salinity. The seawater is harder. Although silkworms can grow in slime or gravel, and in the slime, sandworm grows even better than sandy ones (more humus and more abundant bait). However, in order to facilitate capture, it is better to use less sand and mud, even if Leakage, as long as it does not leak dry, is not a big problem for the breeding of silkworms. The second is the problem of rearing farms. This is particularly important, especially for those who are newly raised, they are often unaware of it. Not only do adults of the silkworms like to eat it, they even have more predators. Clear pond work is more prudent than farming fish and shrimp, but also in the amount of medication should be appropriately increased. Before the clear pond is completely exposed to sunlight, it is not possible to relax the application of pesticides along the border and gate pools, and to prevent the mudflater and small shrimps from losing their shelter so as to ensure that the habitat of the two-toothed cocoon is able to settle down, and not to release it. More or less income. Third, how to increase production and income by breeding double-dented cocoons? Let's talk about feeding first. Most of the current methods of training are light replays, not even feeds. In particular, the only way is to strengthen the feeding. When there is no special formula, it is possible to fertilize it according to the characteristics of the omnivorous cocoon of the double-dentate cocoon. To crush and dilute the water, be sure to pay attention to fine feeding. Don't be confused by the phenomenon of gluttony and feed it too much. This will cause the bottom of the pool to become malignant and drown the silkworm. Say management. Breeding double-dented cocoon silkworms has a much lower management intensity than that of cultured fishes and shrimps, and does not need to be drained regularly. It is sufficient to replace water once in a flood season (about half a month). The main reason is to take advantage of the “Sun Beach†to promote the decomposition of bottom bait and the growth of benthic algae in order to facilitate the growth of sandworms. Water storage should not be too deep, generally 30 cm to 50 cm, when entering and draining, be sure to add filters, and should pay attention to the salinity of the water can not be too great disparity. At present, the two-toothed sand cocoon is used for fishing baits regardless of export or domestic sales. Therefore, it is necessary to fight for preterm birth and more sales during the fishing season. In addition to early release of seedlings and ground-feeding, the specific methods include multiple rounds of catching, catching and keeping small, and reducing. Dismantling disabled people and maintaining well-nured households are effective means of increasing the yield of goods and promoting the increase of production and income.
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