One of the profitable areas of agriculture is sericulture. The development of this field depends on its fodder base. Considering that the mulberry leaf is the only source of food for the mulberry silkworm, it becomes clear how important this area is. To develop this section, the development of fishing science is one of the important issues. Creation of productive varieties, breeding of hybrid seedlings is one of the necessary issues ahead. Hybrid seedlings do not have the ability to transmit the full biological genetic characteristics of the plant. Propagation by means of a pen obtained from varieties retains the hereditary characteristics of that variety. In this regard, pen propagation is considered a convenient method for maintaining productive varieties. When propagating with a pencil, it is difficult to form a root from a pencil. Therefore, by soaking the pen in various solvents, using new modern biotechnological methods, the root is obtained from the pen.