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Identification and Control Methods for the Tea Twig Bark Beetle
One of the boring pests of tea stems and branches, belonging to Coleoptera, Scolytidae, with the scientific name Xyleborus fornieatus Eie. Distribution and damage: In China it occurs more frequently on Hainan Island and is a relatively threatening pest in tropical tea areas, boring into and damaging the stems and branches of tea, rubber, coffee, and other plants. Morphology: The adult is a small beetle, body length 2.4mm, cylindrical. The pronotum is particularly well developed, with a raised dorsal surface; the surface of the forewings has several rows of dense punctures, and the wing tips slope downward, oval-shaped, off-white. Young
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Identification and Control Methods of the Tea Leaf-tier Moth
One of the boring pests of tea branches and trunks, also known as the tea branch sickle moth and tea stem borer, belonging to the order Lepidoptera, family Yponomeutidae (leaf-tier moths), with the scientific name Casmarapatrana Meyrick. It is distributed in all tea-producing provinces of China. Morphology: The adult has tea-brown body and wings, with a body length of 15-20mm and a wingspan of 32-40mm. The forewings are nearly rectangular, with a grayish-black outer margin, a large earth-yellow patch on the inner side, and a small red protruding spot near the center of the wing base. The egg is horseshoe-shaped, about 1mm long, and pale cream-yellow. The larva is slender, with a yellowish-white and slightly
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Causes of Tea Geometrid Outbreaks and Pollution-Free Control Methods
Tea geometrid, also known as the arching worm, measuring worm, and hanging-silk worm, belongs to the order Lepidoptera, family Geometridae. In Liandu District, this pest is mainly distributed in tea areas such as Bihu and Lixin, and is a voracious pest. If control is not timely, it often causes severe reductions in summer and autumn tea yields, and leads to decline in tree vigor, seriously affecting tea production. In previous years it occurred every year, but the damage was not great. In August 2007, this pest broke out over a large area in the Huanglingshang tea garden of Lixin Township, not only severely affecting the tea yield of that season, but also causing decline in tree vigor and poor cold resistance
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What are the control methods for rodent damage to codonopsis (Codonopsis pilosula)?
They begin to damage the seedlings when the seedlings emerge 5 cm above ground. Control methods: (1) Mix 1 part of 3% zinc phosphide with 95 parts of green vegetables, beans, rice, etc.; after mixing well, scatter the bait in the evening in places where rats frequently appear or at their burrows. (2) Mix 1 part of 0.5% bromadiolone evenly with 3 parts of flour, then add cut apple pieces, vegetables, and fried dough sticks (cut into 1 cm pieces) and mix them evenly to coat; this can be placed in the evening in places where rats are frequently active. Alternatively, use 2.5% phorate granules at 1500 g per 667 sq m mixed with 10 kg of fine soil and scatter it along the edges of beds and ridges to drive rats away; be careful not to scatter it on the seedlings.
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Symptom Identification and Control Methods of Root Rot in Codonopsis pilosula
The pathogen is a type of imperfect fungus among the fungi, and it is divided into two types: chronic onset and acute onset. In the chronic type, the disease begins in mid to late May. In the early stage of the disease, dark purple lesions appear on the lower fibrous roots or lateral roots, which then turn black and rot. After the disease spreads to the main root, it gradually rots from bottom to top. The remaining unrotted part is mostly a "half-section ginseng," and the area near the rotted part is dark brown. The stems and leaves above ground gradually turn yellow and eventually die. In the acute type, the disease mostly begins in mid to late June. Once the ginseng root is infected, almost the entire ginseng root becomes diseased at the same time
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Control Methods and Key Technical Points for Codonopsis Diseases
I. Rust mainly damages the stems and leaves of Codonopsis. Control methods: clean the field, eliminate field weeds and diseased plants. In the early stage of the disease, spray 25% triadimefon wettable powder at 1000-1500 times dilution, or 90% dithianon sodium at 400 times dilution for control. Spray once every 7-10 days, for 2-3 consecutive sprays. II. Root rot mainly damages the roots of Codonopsis. Control methods: from July to August, apply additional phosphorus and potassium fertilizer. Before transplanting Codonopsis, soak the roots in 50% thiophanate-methyl wettable powder at 1000 times dilution for 5 minutes. When the disease occurs
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Symptoms, Identification and Control Methods of Pinellia Leaf Spot
It occurs in early summer. Purple-brown spots appear on diseased leaves, and later many small black dots form on the lesions. In severe cases, the lesions cover the entire leaf, causing the leaves to curl, scorch and die. Control methods: In the early stage of the disease, spray 1:1:120 Bordeaux mixture or 65% zineb 500-fold solution, once every 7-10 days, for 2-3 consecutive applications.
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Symptoms and control methods of pinellia virus disease
It mostly occurs in summer; infected leaves curl and twist, and the plants grow stunted. Control methods: ① Select disease-free plants for seed. ② Disinfect the soil before sowing and control pests promptly. ③ When diseased plants are found, pull them out immediately, burn them in a centralized pile and bury them deep, and pour 5% lime milk into the diseased planting holes.
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What are the main pest and disease control methods for mushroom sheds?
1. Mushroom flies: The larvae, also called fungus maggots, mainly feed on the fruiting bodies, boring tunnels that affect quality, and the wounds they create are very easily infected by pathogens, causing rot. Different methods should be used to control mushroom flies at different stages. If large numbers of fungus maggots appear before mushroom emergence, you can fumigate with dichlorvos at a rate of 0.90 kg per 100 sq m, and at the same time spray each culture block with another 0.15 kg of 1% potassium chloride or sodium chloride solution (5% salt water can be used as a substitute); if fungus maggots cause damage after mushroom emergence, you can spray low-toxicity pesticides such as derris extract, permethrin, and nicotine. (Nicotine
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Causes and Control Methods of Hollow Stems with White Cores in Mushrooms
Symptoms: The mushroom stem tissue is not solid, with a white, loose pith appearing inside; after the fruiting body dries or is cooked, the pith shrinks or falls away, becoming hollow. Causes: This is mainly due to improper water management. If the air humidity in the mushroom house is low and the soil layer humidity is low, especially when the water content of the coarse soil layer is insufficient, the rapidly growing fruiting bodies cannot obtain sufficient water from the soil layer, and consequently the transport and supply of nutrients are also reduced. Combined with the continuous evaporation of water from the fruiting bodies themselves, this causes a lack of water in the middle of the stem and loose tissue, thereby
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