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Occurrence Characteristics and Control Methods of Mushroom Gall Midge
I. Morphological Characteristics The gall midge, also known as the small red maggot or mushroom gnat, has adults that resemble small mosquitoes, tiny and delicate, difficult to see with the naked eye. The head, thorax, and dorsal side of the body are dark brown, while the rest is grayish-brown or light orange. Larvae can hatch from eggs or be reproduced by the mother's larvae. Each female can produce an average of more than 20 larvae. In the early stage, larvae cause damage in the substrate, resulting in sparse and weak mycelium. In the later stage, they move to the mycelium and fruiting bodies. When fruiting bodies are damaged, they first breed at the base of the mushroom stipe, then climb to the junction between the stipe and the cap, and some bore into the gills, which are eaten into scars and trails, appearing light orange-red. A single mushroom can host 20 to 30 larvae in severe cases, seriously affecting the quality and yield of mushrooms.
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What are the control methods for mushroom gall midges?
I. Causes (1) Improper composting of the growing substrate. The substrate is not fully fermented, the turning of the pile is uneven, the fermentation time is too short, and disinfection is not thorough. (2) Unsuitable microclimate inside the mushroom house, such as humidity being too high. (3) Poor cultivation conditions. Growers use old mushroom racks to cultivate mushrooms and do not disinfect thoroughly after harvesting. The water source is not clean and carries diseases, pests, and contaminant microorganisms. The mushroom house has poor ventilation. II. Control methods (1) Site selection and mushroom house disinfection. The mushroom production site must be chosen in a place with dry terrain, close to a clean water source.
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How to Identify Mother Cultures and Spawn of Edible Fungi? A Detailed Guide to the Methods
Shiitake (Lentinula edodes) spawn: the mycelium is snow-white, thick and strong, spread out, and uniform, with even margins and a fast growth rate; on the bottle wall it develops in a fan-shaped, feather-like pattern, growing vigorously, and secretes soy-sauce-colored droplets. After the mycelium has fully covered the bottle, within 10 to 15 days an amber-colored transparent liquid is commonly seen, along with the distinctive fragrant aroma of shiitake, with no foul or musty odor. If the mycelial column inside the bottle pulls away from the bottle wall, this indicates that the substrate moisture is too high; if it has pulled away and the mycelial column also begins to shrink, with the surface mycelial skin thickening and turning dark brown, this indicates that the spawn has begun to age and cannot
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Key Technical Points and Detailed Methods for Mushroom Spawn Production
3. There are 3 methods for isolating mother spawn: spore discharge, tissue isolation, and substrate mycelium isolation. Here we mainly introduce the tissue isolation method. Tissue isolation method: cutting a small piece of tissue from each mushroom and transferring it onto a slant medium to culture into mother spawn. The fruiting body of an edible mushroom is actually a knot of dikaryotic hyphae, which has a very strong regenerative capacity. Therefore, as long as a small piece of tissue is cut and inoculated onto a suitable medium and cultured at an appropriate temperature, pure mycelium can be obtained. In tissue isolation, the selected mushroom is brought into a sterile room, and on an ultra-clean workbench, the cap and stipe are wiped with 75
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How to increase the yield of edible mushrooms? Introduction to practical methods
1. Scratching method: When the mycelium has covered the surface of the substrate, gently sweep a clean bamboo broom back and forth over the substrate surface to remove or break up the spindly surface mycelium and old mycelium. After new mycelium is exposed, spray water and cover with plastic film to retain moisture and warmth; primordia will appear and mushrooms will fruit in about 7 days, generally increasing the yield by about 10%. 2. Startling method: After the substrate is fully covered with mycelium, press and pat the substrate surface with flexible wooden slats to vibrate it. When doing this, apply force evenly, do not leave deep marks, and do not damage the substrate surface. This can promote accelerated mycelial growth and rapid differentiation of fruiting bodies. This method is suitable for shiitake (Lentinula edodes), oyster mushroom (Pleurotus ostreatus), phoenix mushroom
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What are the traditional fertilization methods for increasing the yield of edible fungi?
When edible fungi reach the middle and late stages of fruiting, a large amount of nutrients has basically been consumed. In order to strengthen the aftergrowth of fruiting, appropriate topdressing fertilizer must be applied, which can increase the yield. Mushroom growers are advised to adopt the following measures, which will have a very good yield-increasing effect. 1. Apply mushroom soup: Collect and wash the mushroom stems and broken mushrooms cut off during harvest and processing, cut them into thin slices, add 1—1.5 kg of water per kg of material, boil for 15 minutes, take the filtered juice and add 10—15 kg of water, and spray it on mushroom trays or fungus bags. Using it at the peak of fruiting can make the fruiting bodies thick and extend
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How to apply top dressing in the later stage of edible fungi? These methods must be mastered
In the later stage of mushroom fruiting, in order to enhance the stamina for fruiting, mushroom growers often use various means to add nutrient solutions for top dressing. But only by using the correct method of addition can the expected goal be achieved. Otherwise, it is like pulling up seedlings to help them grow, achieving the opposite effect and bringing losses to producers. 1. Pay attention to the method of addition. There are usually three methods for adding nutrient solution: spraying, soaking and filling holes. The time for spraying nutrient solution is suitable when fruiting bodies appear in large numbers. When spraying, care should be taken that the nozzle is not directly facing the fruiting bodies, and at the same time pay attention to the "four no-spray" rules:
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Chemical Preservation Methods and Key Techniques for Edible Mushrooms
Chemical preservation of mushrooms has the advantages of being simple, low in cost, and highly effective. Sodium chloride (table salt) preservation: after trimming freshly picked oyster mushrooms, Phoenix mushrooms, and the like, soak them in 0.6% salt water for about 10 minutes, drain, and store in plastic bags; they can be kept fresh for 5 to 8 days. Sodium metabisulfite preservation: spread freshly harvested oyster mushrooms on a clean concrete floor and spray the mushroom bodies with a 0.15% sodium metabisulfite aqueous solution, turning the mushrooms while spraying so that the spray is evenly applied. After spraying, place them in plastic bags
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Symptoms and Control Methods of Brown Spot Disease in Edible Fungi
Damaged crops: Edible fungi. Damage symptoms: Does not infect the mycelium, only infects the fruiting bodies, but can grow along mycelial strands, forming relatively dry grayish-white tissue masses. Infected mushroom buds stop differentiating; after young mushrooms are infected, the caps become smaller, the stems become thicker and brown, forming deformed mushrooms; after the fruiting bodies are infected in the middle to late stages, many pinhead-sized, irregular brown spots appear on the caps and gradually expand into grayish-white depressions. Diseased mushrooms often have their surface layer peeling or cracking, do not rot, and have no foul odor. The disease course is about 14 days. Classification attribute: Verticillium
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Harm and Control Methods of the Mold Mite in Edible Fungi
Tyrophagus putrescentiae belongs to the family Acaridae, genus Tyrophagus, and is distributed throughout the country. (1) Harm characteristics This mite is one of the most important pest mites of edible fungi. It frequently occurs in mushroom spawn bottles, mushroom beds, and shiitake mushroom blocks, and also damages straw mushrooms and oyster mushrooms. It also commonly occurs in large numbers in edible fungus cultivation materials such as rice straw, cottonseed hulls, and barnyard manure, especially in humid environments, where it reproduces quickly and occurs in large numbers. After the edible fungus mycelium is fed upon, it breaks apart and gradually tends toward aging and decline.
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