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What are the common pests of camellias? Detailed control methods
What pests of camellias need to be controlled? Here is a detailed introduction. Camellias have the following pests that need to be controlled: Aphids [Appearance and damage] Aphids are divided into two types: winged aphids and wingless aphids. The winged viviparous female aphid has transparent wings and a dark brown body; the wingless viviparous female aphid has no wings and a dark brown body. In addition, the nymph resembles the adult in appearance, has no wings, and is light yellow. Adults and nymphs gather on the young shoots of camellias to suck sap, causing the buds and leaves of the affected camellias to shrivel and severely affecting growth. The excrement of aphids can cause sooty mold.
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What are the control methods for mushroom death in summer for oyster mushrooms?
How to prevent and control mushroom death when cultivating oyster mushrooms in summer? Please introduce the methods. When cultivating oyster mushrooms in bags in summer, sometimes a large number of small mushrooms die after fruiting. The main reasons are the following four points, and preventive measures should be taken early. Excessive temperature: After the primordia of oyster mushrooms form, if high temperature (above 30°C) continues, the caps...
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What are the control methods for ginseng gray mold?
How do you control ginseng gray mold? Please explain the methods. Ginseng gray mold symptoms: It damages ginseng leaves; the lesions on the leaves are limited by the leaf veins and appear polygonal or irregular. They are light brown, and on the underside of the lesions there is a sparse, thin, grayish-white or pale yellow mold layer, namely the pathogen's sporangiophores and sporangia. In the later stage, the lesion tissue necroses, breaks apart easily...
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How to prevent and control ginseng root rot? These methods you need to master
How to prevent and control ginseng root rot? Please give an introduction. Symptoms of ginseng root rot: it mainly damages the roots of seedlings and the stem parts below the soil surface. The rotting ginseng roots appear dark brown and wet-rotten, and later become decayed and hollow, with only the hollow root skin remaining. The aboveground parts of affected ginseng seedlings show no obvious symptoms in the early stage, and in the middle and late stages the leaves fade to yellow, wilt and die....
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Common Diseases of Scutellaria baicalensis (Chinese Skullcap) and Their Control Methods
What diseases need to be controlled when growing Scutellaria baicalensis? Here is an introduction. The diseases that need to be controlled when growing Scutellaria baicalensis are the following two: 1. Leaf blight. ① Occurrence period and symptoms. It is prone to occur during hot and rainy seasons. It begins with irregular dark brown lesions at the leaf tip or leaf margin, gradually extending inward, causing the leaves to dry up...
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Pest Control Tips and Management Methods for Jujube Trees in Autumn and Winter
How to control pests on jujube trees in autumn and winter? Please provide methods. Pest control on jujube trees in autumn and winter can be carried out with reference to the following methods: 1. Deep plowing of the soil. After the jujube fruit is harvested, promptly deep-plow the soil beneath the trees, generally to a depth of 10-50 cm. This measure can reduce the damage caused by more than 20 species of pests, including the jujube slug moth, jujube gall midge, red spider mite, and peach fruit borer...
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How to prevent and control magnolia leaf blight? Master these practical methods
How to prevent and control magnolia leaf blight? Please give an introduction. The main symptoms of magnolia leaf blight occur on the leaves, and in severe cases can spread to the petioles and flower buds. The lesions mostly occur at the leaf margins, initially appearing as faded green yellow spots, water-soaked, with numerous lesions joining together into patches, expanding outward in a fan shape, with dark brown edges and grayish-yellow interiors, which can cause...
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How to prevent and control cilantro leaf blight? These methods you need to master
What harm does cilantro leaf blight cause? How to prevent and control cilantro leaf blight? Netizens, please help share. Zhongdiwang has compiled the harm and control methods of cilantro leaf blight, listed below for netizens' reference. Harm of cilantro leaf blight: once the disease occurs, the condition spreads rapidly and the harm caused is relatively serious. It mainly...
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What are the control methods for Magnolia leaf spot disease?
How do you control Magnolia leaf spot disease? Please give guidance. Magnolia leaf spot disease: 1. Symptoms: Also known as brown spot and leaf spot, it mainly damages leaves. It first appears as small yellow to light brown round spots, then expands into nearly round to irregular large spots, with reddish-brown line patterns at the edges and grayish-white centers; in the later stage, small black dots are scattered on the diseased areas...
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What are the control methods for southern magnolia leaf blight?
How do you control southern magnolia leaf blight? Please give guidance. Southern magnolia leaf blight: 1. Symptoms: The leaf blight pathogen mainly infects leaves. On the surface of diseased leaves, light brown or yellow small spots first appear, which later expand into round or irregular lesions, 5-12 mm in diameter, with dark brown edges and grayish-white centers, on which many small black dots are borne...
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