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What are the control methods for the box tree webworm (Glyphodes perspectalis)?
It damages boxwood, boxwood (Buxus sinica), large-leaved boxwood, small-leaved boxwood, Japanese boxwood, spoon-leaved boxwood, Korean boxwood, holly and others. The larvae spin silk to bind leaves together and make nests, damaging the host plants. The damaged leaves first show yellow dead spots, and later the entire leaf falls off. They spin silk to bind the leaves and the damaged fallen leaves together, so that the leaves cannot spread out and growth and development are severely affected; when the damage is severe, the whole plant dies. In Shanghai it has 3 to 4 generations a year, with serious overlapping of generations; it becomes active in March of the following year, begins pupating in mid-April, begins emerging in late April, and the first generation
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How to check for silkworm diseases? Learn the seven-observation diagnostic method
Observe development: Healthy silkworms develop and grow uniformly. If the body is enlarged, develops too fast, and the instar period is noticeably shortened, be alert for silkworm nuclear polyhedrosis. If the body is too thin and uneven in size, be alert for silkworm empty-head disease, stings by golden haired caterpillars, and exhaust gas poisoning. Observe feeding on mulberry: Large silkworms make sound when eating mulberry leaves; if the sound is faint or absent, be alert that the silkworms are sick. With pesticide poisoning, silkworms will crawl about wildly and gradually stop feeding and spit out milky silk. Observe behavior: Healthy silkworms are lively in behavior, highly alert, and quick to respond. Unhealthy silkworms react abnormally. For example: (1) Silkworms with nuclear polyhedrosis crawl about frantically
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Introduction to the New Silkworm Variety for Summer and Autumn, Xiafang x Qiubai
Xiafang x Qiubai is a silkworm variety for summer and autumn use bred by Southwest Agricultural University through repeatedly setting up high-temperature environments. In 1992 and 1993, it participated in indoor variety comparison tests and rural trials in Sichuan Province, and all economic indicators reached or exceeded those of the control variety "781 x 7532". In March 1994, it passed the approval of the Sichuan Provincial Silkworm Variety Approval Committee. The Xiafang x Qiubai variety is a summer-autumn use variety bred by combining hybrid breeding and systematic segregation breeding. Due to reasonable parent selection, the breeding scheme
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A Complete Analysis of New Techniques for Scientific Silkworm Rearing
The silkworm is a completely metamorphosing silk-spinning insect among polyvoltine poikilothermic animals. Its larva, after 4 molts and 5 instars over 26-28 days, eats more than 20 grams of mulberry leaves in total, then matures, spins silk and cocoons. The cocoon is white, weighing about 1.8-2.3 grams, with a cocoon shell ratio of 20-23%, a silk length of 1000-1400 m and above; silk thickness 2.6-3.2 denier. Usually, rearing 1 sheet of silkworm eggs has 18,000-20,000 silkworms, requires 50-600 kg of mulberry leaves, and can produce 30-40 kg of silkworms. The currently more scientific new rearing techniques are the following five points
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How to treat anchor worm disease in fish? A detailed explanation of nine treatment methods
Anchor worms are parasitic copepods that are very harmful to fish. The common anchor worms include four species: Lernaea polymorpha, Lernaea cyprinacea (carp anchor worm), Lernaea ctenopharyngodontis (grass carp anchor worm), and Lernaea quadrispina. Anchor worms can parasitize both young fish of the year and adult fish; they bore their heads into the host's muscles or under the scales, while the thorax and abdomen remain exposed outside the host's body. At the sites where anchor worms parasitize, needle-shaped pathogens are visible to the naked eye. If anchor worms parasitize a fish for a long time, the surface of the worm body often has protozoa and algae growing on it, appearing to the naked eye like a bundle of gray
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Detailed Explanation of Key Technical Points for Disinfection and Disease Prevention in Silkworm Rearing
With the Western Development Strategy, the state began implementing the "East Mulberry Moved West" plan. In many places in Yunnan Province, as part of a new round of industrial restructuring, the sericulture industry is being given key support as a distinctive industry for increasing farmers' income and helping them become prosperous. However, during the process of raising silkworms, outbreaks of silkworm diseases caused by inadequate disinfection or improper methods often leave mulberry-growing and silkworm-rearing farmers with no cocoon harvest at all and with heavy economic losses. Thorough disinfection and disease prevention, and eliminating pathogen transmission, are the key measures for achieving high-quality and high-yield silkworm cocoons. The key technical points are as follows. 1. Disinfection of silkworm rearing houses
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What are the characteristics of silkworm disease prevention and control? A detailed explanation
(1) Wide range of infection sources 1. Infection sources during sericulture: diseased and dead silkworms, pupae, and moths during sericulture, as well as their pathogen-carrying feces, silkworm litter, old mountages, and rotten cocoons, are serious sources of silkworm disease infection. 2. Cross-infection with field insects: diseased field insects, insect carcasses, and insect feces contaminating mulberry leaves are another source of silkworm disease occurrence. 3. Pathogen accumulation and toxic contamination in the sericulture environment. (2) Poor feeding and management, weak silkworm constitution makes them susceptible to disease 1. Lack of attention to
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The role and method of use of molting hormone solution for silkworms
Hormone drugs regulate the growth and development of silkworms, and are mainly used to promote uniform maturity of silkworms and neat mounting on the cocooning frames. This product is specified as 2ml x 10 vials/box (2ml:45mg). Usage and dosage: when 5% mature silkworms are seen, add 2ml to 2000ml of ordinary water and spray on the leaves, for 20,000 silkworms to consume in one feeding.
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How to effectively control the Schisandra leaf-rolling worm
It occurs from July to August. The larvae are initially white, later turning green. Young larvae bite and feed on the leaf mesophyll; after the 3rd instar they roll leaves and feed, affecting fruit development. Control methods: (1) Before the larvae roll the leaves, spray with 80% trichlorfon at 1000-1500 times dilution. (2) After the leaves are rolled, spray with 40% dimethoate emulsifiable concentrate at 1000-1500 times dilution. (3) Spray with 50% phoxim at 1500 times dilution. (4) Spray with 50% phosphamidon emulsifiable concentrate at 2000 times dilution. (5) Before and after the larvae roll the leaves, they can also be caught by hand.
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Silkworm Feed Processing Technology: A Detailed Explanation of Special Feed Production Methods
Wuxi Scientific Research and Design Institute of the Ministry of Internal Trade (Wuxi, Jiangsu 214035) The special feed processing technology comprises three parts: industrial-scale processing of artificial feed for the silkworm, nutritional formulation, and rearing. In processing, a new technique of dry-heat kill-green (de-enzyming) and drying of fresh mulberry leaves was pioneered, and technologies such as micro-grinding, mechatronic integration, addition of feed active substances, anti-corrosion sterilization, and shaping and packaging were adopted, solving technical difficulties of artificial silkworm feed such as fresh-keeping and drying of raw materials, grinding, wet-body mixing, and long-term preservation, producing a new artificial silkworm feed product on a large scale
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