Measures to prevent the emergence of three sleepworms
At present, most of the silkworms reared in our province are four-sleeping silkworms. Under normal conditions of rearing and rearing, four generations of sleep should occur four generations of silkworms. However, if the conditions are delayed and the feeding conditions are poor, four generations of silkworms may have only three sleeps per generation, resulting in a decrease in the number of mulberry pods, a decrease in pods and a decrease in yield.
The reasons for the three sleeps of the four-sleeping silkworm are as follows: jutting at low temperature, dry, and dark conditions at about 20°C; receiving light for more than 12 hours a day during the young silkworm period; tenderness or protein content of the mulberry leaves being fed is too high; The silkworm species did not receive warming protection after being brought back in. They were put directly on the natural temperature to revive greening, resulting in a prolonged period of time for accelerating the acclimatization, and the accumulated temperature did not reach the standard; silkworms were exposed to high temperatures during the breeding process for a long time.
To prevent the emergence of three sleep silkworms, the following five points should be done: (1) Must go to the sericulture technology promotion and service department, that is, the main channel for seeding. (2) Must be reminded of as required. After the silkworm species are brought back, they must be refreshed at a suitable temperature. The air should not be too dry, the humidity should be controlled at about 80%, and attention should be paid to dark protection. (3) It is necessary to do a good job in the management of mulberry manure with the combination of organic fertilizer and organic and inorganic fertilizers. The mulberry field partial nitrogen fertilizer, easy to make the mulberry protein content is too high, silkworm eat this mulberry leaf, prone to three sleep silkworm. (4) The quality of the leaves is good, especially during the feeding of juvenile silkworms, the tender mulberry leaves are not fed, and the feeding of the proper ripe leaf is the main method. (5) Avoid long-term exposure to high temperatures above 30°C in the breeding process, and do a good job of preventing heatstroke during high temperature weather.
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