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Key Technical Points for Intensive Management of Oriental River Prawn in Autumn and Winter
Currently, it is the key season for stocking oriental river prawn in autumn and winter. Doing a good job in substrate, seed stock, bait, and water quality control, and effectively preventing disease and surfacing, are the top priorities for increasing production and income of oriental river prawn by the end of the year. Below, the relevant techniques for intensive culture of oriental river prawn are discussed from five aspects, for the reference of
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How to feed pigs in pens? Practical feeding tips for you
Raw feeding and cooked feeding In rural areas, pig farmers have the habit of feeding cooked feed, believing that cooked feeding can reduce feed volume, soften crude fiber, allow pigs to eat more, and improve digestibility. Depending on the type of feed, raw feeding and cooked feeding differ. For green and coarse feed types
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How to Increase Oriental River Prawn Yields in Mixed Shrimp-Crab Ponds
Mixed shrimp-crab culture is the main aquaculture model promoted under the fishery science and technology outreach program in Xiangcheng District. In recent years, while river crab prices have repeatedly been hit by the market, oriental river prawn prices have remained relatively firm. Therefore, while ensuring river crab growth, tapping the production potential of oriental river prawn has become a way to achieve
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How to prevent and treat shell ulcer disease (brown spot disease) in prawns
(1) Pathogen The bacteria that can be isolated from the lesions include Vibrio, Pseudomonas and Flavobacterium, etc. They are Gram-negative bacilli. (2) Symptoms ① On the body surface shell and appendages of diseased prawns there are dark brown or black spot-like ulcers, forming
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How to prevent and treat filamentous bacterial disease in prawns? Methods farmers must see
(1) Pathogen The pathogens are Leucothrix mucor, Thiothrix (TAiothrix) and Flexibacter, etc. Leucothrix is filamentous, unbranched, slightly thicker at the base and slightly narrower at the tip, with a length of 5-500 microns or more. It reproduces by conidia and develops into new bacterial cells.
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Experience Sharing on Rotational Culture of Giant Freshwater Prawn and Mandarin Fish
Macrobrachium rosenbergii is not tolerant of low temperatures. In late autumn and early winter, when the water temperature drops to 15°C, the pond must be drained and the prawns harvested for market in a timely manner. In this way, the Macrobrachium rosenbergii culture pond is actually only utilized for half a year (May to October). Mandarin fish do not completely stop feeding in winter and continue to grow, only with reduced feeding intensity and growth rate.
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Control Methods for Strawberry Leather Rot, a Must-Read for Growers
In recent years, along with the optimization and adjustment of the planting structure, the strawberry cultivation area in Laizhou City has expanded rapidly. Due to continuous cropping, strawberry diseases have shown a worsening trend, especially the emergence of strawberry leather rot, which has a great impact on the yield and quality of strawberries, and in severe plots
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Summary of Pesticide Use Experience in Pollution-Free Strawberry Production
I. Strictly select pesticides and strictly implement pesticide safety intervals. In pollution-free strawberry production, biological pesticides should be given priority, and highly efficient, low-toxicity, low-residue chemical pesticides should be used selectively. These pesticides mainly include: (1) Insecticides, such as the Bt series, avermectin series, pyrethroids, plant extracts (such as tebuconazole and capsaicin, etc.), insect hormones (Mimic, Cascade, IKI-7899), a small number of organophosphorus pesticides (trichlorfon, chlorpyrifos, Lorsban) and other pesticides such as imidacloprid, etc. (2) Fungicides, such as Bordeaux mixture, polyoxin, thiophanate-methyl, Score, Nustar, Kocide, chlorothalonil, triflumizole, Bellkute, pyrimethanil, etc. (3) Herbicides, such as quizalofop, haloxyfop, etc. (4) Smoke agents, such as sulfur fumigants, procymidone, aphid-killing smoke agents, etc. Throughout the entire strawberry production process, it is strictly forbidden to use highly toxic and high-residue pesticides such as methamidophos, carbofuran, chlordimeform, omethoate, dicofol, methyl parathion, sodium pentachlorophenate, fosthiazate, chloropicrin, nitrofen, etc.
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Strawberry Cultivation: Experience Sharing on Soil Testing and Formula Fertilization
1. Fertilizer requirements: Strawberry growth requires nitrogen, phosphorus, potassium, and various trace elements such as boron, magnesium, zinc, iron, and calcium. Early growth requires phosphorus, the early-to-mid stage requires large amounts of nitrogen, and the entire growth period requires potassium. With severe nitrogen deficiency, the leaves turn yellow, become partially scorched, and are slightly smaller than normal leaves.
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Key Points of Winter Field Management Methods for Greenhouse Strawberries
Moisture retention In northern regions, film covering for insulation begins from late September to early October. In addition to double-layer insulation covering with large greenhouses and small arched sheds, winter strawberries can also be protected with measures such as leaf covering. Temperature and humidity management: In the early stage after planting, maintain 25°C-30°C during the day, and at night 12°C-
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