The function and application method of the automatic mounting-cluster agent for ripe silkworms

(1) Brief introduction "Automatic mounting-cluster agent for ripe silkworms" is a new type of silkworm medicine that promotes uniform maturity of silkworms and automatic mounting of ripe silkworms onto clusters; at the same time, unripe silkworms, diseased silkworms and weak silkworms do not climb onto the clusters, improving cocoon quality and reducing the rate of inferior cocoons.

(2) Advanced nature of the technology "Automatic mounting-cluster agent for ripe silkworms" passed appraisal organized by the Guangdong Provincial Higher Education Bureau in 1993, and experts unanimously considered that the result reached the domestic leading level. In China, molting hormone is used to make silkworms mature uniformly; when they are ripe, they are picked up one by one by hand and placed on clusters, or unripe and ripe silkworms are picked up together with both hands and placed on clusters. The use of molting hormone can save some labor, but the use of molting hormone reduces cocoon shell weight by 4%-6%. According to field production in Luoding and Yunfu in 1993 and test results from the laboratory of the Department of Sericulture, South China Agricultural University, compared with the use of molting hormone, the use of "Automatic mounting-cluster agent for ripe silkworms" saves 248 min per egg card; the use of "mounting-cluster agent for ripe silkworms" can reduce the rate of inferior cocoons and increase good cocoons. With the "mounting-cluster agent", the rate of inferior cocoons is on average 40.91% lower than with molting hormone, cocoon shell weight is 1.63%-3.6% higher than with molting hormone, good cocoon yield per egg card increases by 1.77-3.86 kg, and output value per egg card increases by 13.86-35.98 yuan.

(3) Scope of application At present, in the @#@250@#@ production process in China, ripe silkworms are all picked up by hand and placed on clusters, which consumes much labor, concentrates labor, and results in low labor productivity. However, after "Automatic mounting-cluster agent for ripe silkworms" is fed 10-12 h before ripening, it can make ripe silkworms uniform and highly active, and 90% of ripe silkworms can automatically climb onto the silkworm clusters, while unripe silkworms and diseased silkworms do not climb onto the clusters, thereby improving cocoon quality.

(4) Production conditions "Automatic mounting-cluster agent for ripe silkworms" is a medicine that regulates the metabolism of silkworm larvae and enhances the sensitivity of ripe silkworms to light; it can be produced in ordinary chemical laboratories.

(5) Market analysis At present, the process of mulberry cultivation and silkworm rearing in China is basically manual work, with low labor productivity. Producing 100 kg of cocoons requires about 600 h, while in Japan it is about 200 h. Although rural labor in China is not temporarily in short supply, with the reform of the rural economic system and the development of the commodity economy, industries that consume large amounts of labor and have low economic returns will gradually weaken in competition. Therefore, the development of labor-saving silkworm rearing will be imperative. If this medicine is promoted and used in Guangdong Province (calculated on the basis of 1.56 million egg cards in 1992), calculated without the use of molting hormone, it can save 9.62 million h of work time and increase net income by 23.0724 million yuan. If compared with the use of molting hormone, it can also save 6.448 million h of work time and increase income by 42.2448 million yuan. (The cost of "mounting-cluster agent" per egg card is 1.00 yuan, and the cost of molting hormone is 0.50 yuan.) The application effect is good, it is well received by the vast number of silkworm farmers, and it has very good prospects for promotion and application. In the past two years, cocoon prices have been affected by the continuous decline in international silk prices. Cocoon prices have dropped from 19-20 yuan/kg to 8-9 yuan/kg, and silkworm farmers have switched to other crops. This is temporary. If international silk prices rise, domestic cocoon prices will rise, and silkworm farmers will set off a wave of silkworm rearing. At that time, "mounting-cluster agent for ripe silkworms" will be better promoted and applied.

(6) Investment analysis The scale of investment is determined according to market demand; production cost is not high, and about tens of thousands of yuan is enough to start production. The length of the investment payback period depends on market demand. If demand is large, the investment can be recovered in 1-2 years. The unit investment interest rate is 30%-50%.