The harmful effects of laying tussahs prematurely are as follows: First, the silkworms are too early, the eucalyptus leaves are gestating and have not yet bloomed, and they are eaten by the small silkworms prematurely, which affects the growth of the loquat leaves, reduces the yield of the loquat leaves, and reduces the yield of the loquat silkworm field. Tam silkworm volume. The second is the premature emergence of silkworms, often encountering frost infestation, causing freshly harvested ants to suffer from frost damage. The third is the premature emergence of silkworms. The early morning and early morning temperatures are low and the winds are large. Because of the poor grasp of small silkworms, they are often blown off the ground, causing the number of heads of ants to plummet, which is not conducive to keeping seedlings. The fourth is the early spring silkworm, it will certainly close early, which led to the early autumn silkworm species, stocking early, prone to Sanhua silkworm. In short, the early breeding of spring tussah is not suitable for the natural conditions and climate characteristics of Liaoning, contrary to the laws of nature, forced silkworm farmers to invest more species, is a wide variety of thin sericulture methods, not only is not conducive to the construction of silkworm fields, but also increased sericulture Costs reduce sericulture income.
The reasons for this phenomenon are mainly two aspects. The first is to promote the technical regulations of tussah stocking. The tussah production in Liaoning Province plays a decisive role in the country and even the whole world. After years of exploration and practice, the vast number of scientific and technological personnel have summed up a set of successful technical experiences. On this basis, relevant departments of Liaoning Province have formulated technical regulations for tussah silkworm rearing. However, due to the role of the market economy, production and sales are all autonomous, and silkworm farmers have not strictly implemented technical regulations, and the agricultural management departments are not well intervened. Second, the number of private seed production sites in the tussah production counties of Liaoning Province is too chaotic. The supervision of the relevant departments of cities and counties is not in place. The seed production sites in order to seize the market are not suitable for early selling, which leads to early warming, early planting, and early harvesting. . Therefore, the emergence of warming species in southern Liaoning in the middle and late February, Liaobei in late February to early March also warm species, earlier than in the past about 1 week.
When spring tussah is stocked, it is better that the silkworm farmer in Liaoning Province has rich experience. Nongken: Qingming sees moths, Yuyu hatches eggs, and Xixia goes out of silkworms. This is more scientific. After the early planting, the conservation time exceeds 30 days, so that the embryonic development of the silkworm eggs is inhibited, and the emerging small silkworms are weak in growth and development, and have poor resistance and are easy to get diseases. Excessive conservation time is not conducive to pollution if the environment is not good. Of course, spring tussah stocking should not be too late. The spring silkworm is a seed for the autumn silkworm breeding, and it is easy to cause the late autumn silkworm species to grow late in the evening, and it is late for stocking, and is vulnerable to damage from early frost, so that a portion of the silkworm can not be used for breeding.
The correct approach is to determine the time of warm seeding, seed production, and silkworm excretion based on the region, tree species, and climate characteristics of the current year. In particular, timely observation of the growth and development of eucalyptus. Liaodong wolfberry or Mongolian bud è‹ž 嘴 嘴 嘴 mouth shape, Henan æ Ž æ Ž (point 柞 è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž è‹ž 豆 豆 豆 豆 豆 豆 豆 豆 豆 豆 豆 是 是 是 是) Conditional indoor sericulture and seedling protection can be appropriately advanced.
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