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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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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 main pests and diseases of dawn redwood (Metasequoia glyptostroboides)? A full analysis of control methods
Damping-off (seedling blight): after leaf fall in autumn, promptly clear away and dispose of fallen leaves, then spray the ground with 3-5Be lime-sulfur mixture. Dawn redwood red blight: immediately after the plum rain season ends, spray the canopy with 1% Bordeaux mixture 4-5 times, once every 10-15 days, to control the occurrence of the disease. Tortricid moths: the best control period is the early stage of damage when the larvae emerge from overwintering (early to mid-April); 50% fenitrothion, 40% dimethoate, 80% dichlorvos and pyrethroid insecticides can be used; in dry seasons (July and August) when outbreaks occur
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The Harm and Control Methods of the Spruce Bark Beetle
The spruce bark beetle (Ips typographus Linnaeus) belongs to the order Coleoptera, family Scolytidae. In China it is distributed in Northeast China, Inner Mongolia, Sichuan, ** and other places, mainly damaging spruce and Korean pine, and is a destructive pest in some spruce forest areas. Damage characteristics: it bores galleries between the phloem and sapwood of pine trees, and the galleries are compound longitudinal galleries. It can also directly attack healthy trees, and often occurs together with other bark beetles, causing trees to die in patches. Morphological characteristics: adult body length 4.0-5.5 mm,
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Identification and Control Methods of the Spruce Sawyer Beetle
The spruce sawyer beetle (Monochamus urussovi Fisher), also known as the spruce black longhorn beetle, belongs to the order Coleoptera, family Cerambycidae. In China it is distributed in the Northeast, Inner Mongolia, Hebei, Shandong, Jiangsu, Shaanxi and other places. It mainly damages Picea koraiensis (Korean spruce), Picea jezoensis (Jezo spruce), Abies nephrolepis (Khingan fir) and others, and is a major pest of coniferous timber in northern China. Damage characteristics: the larvae damage felled trees, weakened standing trees, wind-thrown trees and logs in timber yards, forming thick galleries; the adults gnaw the tender bark of small branches of living trees. Morphological characteristics: adult body length 21-33
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Identification and Control Methods for the Great Spruce Bark Beetle
The great spruce bark beetle [Dendroctonus micans (Kugelann)] belongs to the order Coleoptera, family Scolytidae. It is mainly distributed in Austria, Belgium, Czech Republic, Slovakia, Denmark, Finland, France and other countries. In China, it has been found in the Makehe forest area of Qinghai Province. It mainly damages some species of Picea (spruce), and occasionally some species of Pinus (pine) and Abies (fir), as well as European larch and Douglas fir. Damage characteristics: adults and larvae attack weakened trees and dead standing trees; during outbreaks, they can attack healthy trees, severely disrupting the trees' transport function,
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Symptoms and Control Methods of Spruce-Bird Cherry Cone Rust
Spruce-bird cherry cone rust occurs in Inner Mongolia, Jilin, Heilongjiang, Sichuan, Yunnan, Tibet, Shaanxi, Gansu, Qinghai, ** and other places in China. The disease affects Picea asperata, Picea purpurea, Picea likiangensis, Picea brachytyla var. complanata, Picea jezoensis, Picea schrenkiana, ** spruce, etc. Symptoms: The disease affects the upper surface of the scales of female cones. Infected scales are twisted, recurved and disorganized. On the upper surface, many small purple-brown spherical bodies are produced in a single layer; these are the aeciospore-bearing structures (aecia) of the pathogen, and sometimes aecia are also produced on the lower surface of the scales. Pathogen: The pathogen is Thekospora areolata (Fr.) Magn.
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Symptom Identification and Control Methods of Spruce Rust Disease
Spruce rust disease is distributed only in the **Tianshan region. The disease has a high incidence rate, but few diseased cones. Infected cones stop growing and quickly die. Symptoms: The disease affects the scales of both female and male cones. Infected female cones are slender and small, curved, with open scales; the bracts become lanceolate, and the cones turn yellow and stop growing. The scales are small, yellow, and bear orange-red protruding telial pustules. Pathogen: The pathogen is Chrysomyxa deformans (Diet.) Jacz.
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Symptoms of Spruce Snow Mold and Its Control Methods
Spruce snow mold is mainly distributed in some countries north of 40 degrees north latitude, where it damages tree species such as Japanese cedar, fir and spruce. In China, this disease has only been found damaging **spruce. Symptoms: after the above-ground parts of the whole plant and the needles are infected under the snow, they are covered with a grayish-brown mycelial layer, or the mycelium invades the interior of the host, causing the tree to become moldy and rot and to suffocate. In mild cases, the mycelial layer is cottony; in severe cases, it is felt-like. Its color is brown in the early stage, and white and grayish-brown when the snow is about to melt. When the disease is mild, the damage is distributed in clumps. When severe, the trees fall over in rows.
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Symptoms and Control Methods of Spruce Leaf Rust
Spruce leaf rust is distributed in Sichuan, Yunnan, Gansu, Qinghai, **, Taiwan, China and other places. The disease damages Picea likiangensis, Picea asperata, Picea crassifolia, Picea brachytyla var. complanata, Picea linzhiensis, Picea schrenkiana and Picea obovata, etc. Symptoms: When buds are infected, the needles on the newly grown tender shoots turn yellow or orange-yellow, short and thick; orange-yellow cushion-like telia or blister-like aecia are produced on the diseased leaves; the diseased buds resemble a yellow flower, and soon the diseased leaves turn black and die. On infected 2-year-old leaves, parts turn yellow, and blister-like aecia or orange-yellow cushion-like
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