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What are the control methods for the jujube inchworm pest?
This insect, also known as the jujube looper, occurs commonly and is widely distributed across all jujube-producing regions of China, where its larvae feed on tender buds, flower buds and leaves. In years of severe outbreak, it can strip the jujube buds and leaves completely bare, resulting not only in no yield that year but also affecting fruit set the following year. [Occurrence pattern] This insect has 1 generation per year. It overwinters as pupae in the soil layer near the tree trunk. The following March, adults begin to emerge from the soil and eclose, with April being the peak period of eclosion and May the final period, the entire eclosion period lasting as long as about 60 days. The egg stage lasts 10-20 days, and hatching begins in mid-April,
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Detailed Explanation of Common Causes of Silkworm Poisoning and Preventive Measures
During sericulture, poisoning sometimes occurs, which at best affects the growth and development of silkworms and at worst causes mass death. Therefore, silkworm farmers must pay attention to it and take measures to avoid losses. 1. Gas poisoning During the incubation period of silkworm eggs or the first and second instars of young silkworms, the temperature in the silkworm room is low and heating is required. If coal products are used for heating and there is no exhaust facility on the coal stove, the toxic gases produced, such as carbon dioxide, hydrogen sulfide, and carbon monoxide, accumulate in the silkworm room and can cause poisoning of silkworm eggs and young silkworms. If silkworm eggs are poisoned during the incubation period, dead eggs or uneven hatching are likely to occur.
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How to prevent the occurrence of small silkworms, "Fusangyi" silkworms and lost silkworms
The level of silkworm cocoon yield is not only related to the weight of a single cocoon, but also depends to a large extent on the number of silkworms per sheet of eggs. Therefore, effective measures should be taken during rearing to prevent the occurrence of small silkworms, "Fusangyi" silkworms and lost silkworms. The specific measures are as follows: 1. Carefully select good leaves. For collecting newly hatched silkworms and for the leaves used for 1st to 2nd instar silkworms, choose mulberry leaves that are suitably mature but on the tender side, fresh in leaf quality, and with a moisture content of no less than 75%. Avoid using old leaves and immature leaves, otherwise small silkworms are easily formed. During the middle feeding stage and the peak feeding stage, fresh and relatively tender mulberry leaves should also be chosen to feed the silkworms. 2. Suitable temperature and humidity. The optimum room temperature for 1st to 2nd instar silkworms
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Silkworm droppings turn out to be an unexpected windfall, and their value should not be underestimated
Since July, in Lezhi County, Sichuan Province, a major cocoon-producing county, an unprecedented novelty has appeared: sericulture farmers who had just sold their silkworm cocoons lined up again to sell discarded silkworm droppings. Silkworm droppings, once worthless, have suddenly become sought after. It is reported that in the county's agricultural and sideline products processing park, a special "park within a park" has taken shape: with silkworm droppings as the main thread, it brings together a series of production enterprises engaged in chlorophyll extraction, feed, fertilizer and biopharmaceuticals, and the output value is expected to reach 1 billion yuan by 2010. Silkworm droppings can be sold for money "No
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New Silkworm Variety Qiantang × Xinchao Passes Approval
Provincial Department of Agriculture Announcement No. 2 of 2008 announced that the new silkworm variety "Qiantang × Xinchao", bred by the Sericulture Research Institute of the Provincial Academy of Agricultural Sciences, passed approval at the 37th Crop Variety Approval Meeting of the Provincial Crop Variety Approval Committee. "Qiantang × Xinchao" is a pair of medium-silk-yield silkworm varieties; this variety develops uniformly, has strong resistance, high cocoon yield, relatively large cocoons, and excellent cocoon quality. It is suitable for rearing in all sericulture areas of our province. Key points for rearing this variety: 1. During the young silkworm stage, it has a strong tendency toward light and crowding, so the seats should be evened out and the trays adjusted in time; 2. During the young silkworm stage, use leaves that are suitably mature but on the tender side
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What are the control methods for pests and diseases of sweet wormwood?
Control methods for pests and diseases of sweet wormwood
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What are the propagation methods for sweet wormwood? Understanding sweet wormwood seedling cultivation in one article
Propagation methods for sweet wormwood
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What are the occurrence patterns of the black-spotted inchworm on black locust
Occurrence patterns of the black-spotted inchworm on black locust: it has 4 generations a year and overwinters as pupae in the surface soil. In early April of the following year, eclosion begins, followed by mating and egg laying; the egg stage lasts 15 days, and the larval stage about 25 days. In early May, the larvae begin to enter the soil to pupate; the pupal stage lasts about 10 days, after which the first-generation adults emerge, with an adult lifespan of about 5 days. Second-generation adults appear in early to mid-July. Third-generation adults appear in mid-to-late August, and the larvae of the last generation cause damage until mid-September, after which they mature, enter the soil, and pupate to overwinter. Eggs are laid in the cracks of rough bark below 2 m on the tree trunk base, piled into masses and covered with gray down. Newly hatched
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Detailed Explanation of Silkworm Egg Surface Disinfection Technology, a Must-Read for Silkworm Farmers
The purpose of egg surface disinfection is to kill pathogenic microorganisms attached to the egg surface, avoiding disease in newly hatched silkworms caused by eating the eggshell. For spring silkworm eggs, disinfection is best carried out 1 to 2 days before hatching. For autumn silkworms, it is best done on the afternoon 1 day before hatching, and on that same day the eggs are taken directly to the mountain to hatch. First, bathe the eggs in a 0.5% sodium hydroxide aqueous solution at a liquid temperature of 18 to 20°C, washing the eggs for 1 minute to remove the adhesive material on the egg surface. Then rinse clean with water, drain off the moisture, and carry out egg surface disinfection. Mix 36% to 38% formaldehyde stock solution, 36% concentrated hydrochloric acid, and water in a ratio of 1:
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What are the key points of mulberry leaf feeding techniques in young silkworm co-rearing?
In the process of young silkworm co-rearing, mastering feeding techniques and ensuring proper nutrition is the key to ensuring young silkworms develop robustly and uniformly. Carefully select mulberry leaves according to the leaf standards for each instar, selecting in the field and selecting on the tree. Choose non-toxic, pollution-free, insect-free, appropriately mature leaves from the upper new shoots. Before leaf preparation, perform a second careful selection, removing leaves that are too old, too tender, wilted, or secondarily contaminated and thus below standard. Planned preparation and storage of leaves for young silkworms During leaf preparation and storage, keeping mulberry leaves fresh and with sufficient moisture is very important. Low-temperature running-water leaf storage
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