Learning that there were problems with autumn silkworm production in some towns and villages in Kuandian Manchu Autonomous County, Dandong City, Liaoning Province, experts from the Liaoning Provincial Green Agriculture Technology Center and the Provincial Sericulture Science Research Institute immediately rushed to the depths of the mountains and went deep into the silkworm farms to find the cause. Answer questions face-to-face for silkworm farmers and ensure a bumper harvest of autumn silkworms.
In mid-August, Kuandian silkworm farmers reported that the growth of autumn silkworms was uneven and oak tree branches were withered. After receiving the request for help, the Sericulture Department of the Agricultural Development Service Center of Kuandian County Agricultural and Rural Affairs Bureau immediately took action. After contacting many parties, it invited experts such as Jia Huiqun of the Provincial Green Agriculture Technology Center and Li Xisheng and Li Hongda of the Provincial Sericulture Science Research Institute to rush to Kuandian. .
At the silkworm farm of Zhang Qingfeng, a silkworm farmer in Jiachanggou Village, Qingyishan Town, the expert team conducted on-site inspections of the tussah tree varieties and leaf quality of the entire silkworm farm, as well as the tussah varieties, growth and development conditions, and provided guidance on the stocking of autumn silkworms. Communicate with silkworm farmers about the situation.
Experts’ on-site inspection found that the oak trees in the silkworm farm were mainly Quercus liaotungensis and Quercus mongolica, and most of the bud trees had dead branches. The reason for this phenomenon is that silkworms fed too much leaves in the previous autumn, resulting in malnutrition of the tree, poor lignification, and freezing damage.
“In the future, during the stocking process, silkworms should be removed in time so that the canopy leaves can be retained. In addition, top dressing can be applied in spring to enhance the tree vigor.” Experts suggest. Regarding the problem of different sizes of tussah silkworms, experts believe that it is mainly caused by too many batches of silkworm seeds. It is recommended to choose the same batch when purchasing seeds. If the quantity is not enough, try to choose 2 to 3 adjacent batches. Secondly, select varieties with good resistance, large size and high quality.
When the silkworm farmers near Qingyishan Town heard that experts from the province were coming, they all put down their work and came to consult. The expert group communicated with silkworm farmers and suggested that when controlling pests, those that can be caught should be caught manually as much as possible, and those that cannot be caught should be controlled with drugs in a timely manner, but attention should be paid to the time, method and method. In terms of disease prevention and control, it is necessary to select varieties with good resistance, disinfect the egg surface, and also conduct comprehensive disinfection of the silkworm farm.
The experts’ “zero-distance” patient and meticulous guidance has been well received by sericulture farmers.
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