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How to prevent and control frost damage to young and newly planted tea trees? These seven methods must be mastered
1. Apply winter manure. Young and newly planted tea trees have relatively weak cold resistance, so before overwintering, a heavy application of winter manure should be combined with earthing up and mounding around the base. The fertilizer should mainly be farmyard manure, stable manure and biogas residue, which have a certain heat-preserving effect, along with a certain amount of cake fertilizer, superphosphate and potassium sulfate fertilizer. Winter manure can not only preserve heat and prevent freezing and enhance the tea trees' freeze resistance, but also lay a good foundation for the tea trees' growth the following year. 2. Earth up and mound around the base. Preventing the root crown from freezing is a key measure for protecting young and newly planted tea trees from frost. Therefore, before young and newly planted tea trees overwinter, they should
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Integrated Control Methods for Soybean "Fire Dragon Seedling"
In Wudalianchi City, Heilongjiang Province, the soybean area is 950,000 mu, with a continuous cropping area of 930,000 mu, accounting for 97.8% of the soybean sown area. Through investigation, the area affected by soybean "Fire Dragon Seedling" is around 96.5%, with most yield reductions between 20 and 50%, and some plots reaching total crop failure. It can be said that due to the influence of the market economy, the continuous cropping area of soybean cannot be controlled, but through integrated control, the occurrence of soybean "Fire Dragon Seedling" can be reduced, enabling soybean to achieve high and stable yields. The integrated control techniques for soybean "Fire Dragon Seedling" are as follows:
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Comprehensive control methods for soybean root-knot nematode disease
Soybean root-knot nematode disease, also known as "Fire Dragon Seedling," is a whole-plant disease caused by nematodes attacking soybean roots, leading to bacterial infection and disease. Affected plants grow slowly, with short, small, and yellowing stems and leaves, delayed flowering, few and small pods, and shriveled seeds; in severe cases, no pods form, or even the entire plant dies. Soybean root-knot nematode disease spreads rapidly, and the pathogenic nematodes can survive in the soil for a long time. Once the disease occurs, it is very difficult to eradicate completely, so comprehensive control measures must be adopted: 1. Select and sow disease-resistant varieties; 2. Control the source of infection
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How to prevent and control rice red blight? These 4 methods work fast
After good early growth, rice enters the reproductive growth stage of the middle and late periods. Strengthening field management at this stage has a great relationship with the yield and quality of rice. So, how can field management in the middle and late stages of rice growth be done well? 1. Timely field drying. Field drying should generally be carried out when rice is not sensitive to water reaction, that is, it is more suitable from the late tillering stage to the early young panicle differentiation stage. The following principles should be followed during operation: fields with sufficient and vigorous seedlings should be dried appropriately earlier; where the mud foot is deep and there is excessive growth, drying should be heavier, otherwise lighter; fields with poor water retention should not be dried heavily; saline-alkali paddy fields generally cannot be dried.
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Harm and Control Methods of the White Peach Scale
Distribution area: Morphological characteristics: The female adult is orange-yellow, broadly oval, with a body length of 1-1.3 mm; the body surface is covered by a scale cover, which is 2-2.5 mm long, grayish white, nearly circular, convex on the back, with the shell point yellowish brown. The male adult is 0.65-0.7 mm long, orange, with grayish white wings. The male scale cover is about 1 mm long, grayish white, long cylindrical, with 3 ridges on the back; the shell point is orange-yellow and located at the front end. Eggs are oval, orange. Nymphs are flat and round, orange.
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What are the pest control methods for the pear lace bug?
This insect, also known as the army-matching bug, gathers as adults and nymphs on the undersides of leaves to pierce and suck sap, causing the damaged leaves to be densely covered with small white spots, or even to turn entirely pale, leading to early defoliation, affecting tree development and flower bud formation, and in severe cases causing the tree to bloom twice in the same autumn, damaging the following year's yield. This insect has a relatively mixed diet and can harm many fruit trees such as pear, apple, Chinese pearleaf crabapple, crabapple, peach, cherry, hawthorn, and jujube. [Occurrence pattern] It has 4-5 generations per year. Overwintering adults begin activity and lay eggs in mid-April, with an egg period of 10-15 days. The
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Occurrence and Control Methods of Withering Tail Disease in Snakes
Diagnosis: Withering tail disease is generally a complication arising from spleen and stomach dysfunction that has not been treated in time. It often presents as emaciation, loss of appetite, shriveling and wrinkling of the tail, and then drying up. Treatment: mainly strengthening the spleen and benefiting the stomach. For traditional Chinese medicine, decoct Amomum villosum (spring amomum), Aucklandia lappa (costus root), Codonopsis pilosula, Atractylodes macrocephala, Poria cocos and Glycyrrhiza uralensis in water and administer orally. For Western medicine, glucose, compound vitamin B liquid, etc. can be administered orally. Inject vitamin B12.
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What are the control methods for gray mold on hydrangea?
In Zhejiang, Shanghai, Jiangsu, Hebei, Beijing and other hydrangea native areas and introduction areas, it occurs to varying degrees. It harms the flowers, flower buds and young shoots of hydrangea, Chinese rose, pomegranate, ornamental peach and many other flowering trees and shrubs, causing the affected parts to soften and rot and reducing their ornamental value. Symptoms The lesions occur mainly on the flowers. At first, water-soaked irregular small spots appear on the petals, then gradually expand and can spread over the entire corolla and inflorescence. When flower buds are affected, irregular water-soaked small spots also appear, which can expand to the entire flower bud, and finally the flower bud softens and rots and cannot open. Young shoots are
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Symptom Identification and Control Methods of Hydrangea Ringspot Virus
[Distribution and Damage] Hydrangea (Hydrangea macrophylla), also known as bigleaf hydrangea, is a deciduous shrub planted throughout China. Many viruses infect it, with ringspot being the most common. It is generally latent; severely affected plants are stunted with few or no flowers. [Symptoms] Leaves are crinkled, and stems sometimes show necrotic spots. In inoculated diseased plants, old leaves develop chlorotic spots, brown ringspots, or oak-leaf patterns. [Pathogen] The virus HyRSV, also belonging to the potato virus Y group. Particles are filamentous, measuring 47
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Symptom Identification and Control Methods for Hydrangea Bud Blight
Hydrangea bud blight is also known as hydrangea gray mold. It damages the buds and flowers of the plant. Symptoms: In field-grown plants, it easily occurs in dense spherical flower clusters, causing them to develop water-soaked rot. In greenhouse cultivation, buds are prone to turning black and withering. Pathogen: The pathogen is Botrytis cinerea Pers., belonging to the Deuteromycotina, Hyphomycetes, Moniliales, genus Botrytis. Disease pattern: The pathogen overwinters as mycelium in diseased plant debris. In the following spring, it produces conidia
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