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Common Types of Orchid Viruses and Analysis of Their Transmission Routes
I. Common Orchid Viruses 1. Cymbidium Mosaic Virus (CyMV) (1) Symptoms Orchid plants infected with Cymbidium Mosaic Virus often tend to develop necrotic symptoms, such as black necrotic spots, necrotic streaks, etc. In addition to necrosis on the leaves and stems, infected plants also develop necrosis on the flowers, which is a symptom unique to Cymbidium Mosaic Virus. Orchid varieties susceptible to infection include Cymbidium sinense, Cattleya, Oncidium, Cymbidium hookerianum, Vanda, and Phalaenopsis. Necrotic spots sometimes appear only on the lower surface of leaves and not on the upper surface; this phenomenon occurs in Oncidium, Dendrobium, Vanda, and Phalaenopsis, and is therefore often mistaken by growers as being caused by fungal infection. Some Cymbidium plants infected with Cymbidium Mosaic Virus, such as Cymbidium hookerianum, Cymbidium sinense, Oncidium, and Phalaenopsis, also produce yellow-green mottled mosaic or yellow chlorotic streak symptoms. In addition, some orchid species show no recognizable symptoms after infection.
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How to Choose Bedroom Plants: These Types Purify the Air Effectively
A bedroom is, to some extent, a secret garden that holds all kinds of emotions. If this garden could be adorned with green plants that have both good looks and talent, wouldn't it feel even more relaxing? But be careful: not all plants are suitable for the bedroom...
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Different types of micro-fertilizers have different usage methods, and scientific application requires distinction.
In recent years, the problem of wheat seed burning and seedling burning during autumn planting has occurred repeatedly. In mild cases, it causes 20% to 30% missing seedlings and broken rows; in severe cases, replanting becomes necessary, and this problem is on the rise. In pursuit of higher and higher yields, some farmers one-sidedly believe that as long as they apply more fertilizer, they can achieve high yields. They pay no attention to whether the soil nutrients in the plot are abundant or deficient...
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What types of succulent cuttings are there? Many gardening enthusiasts don't know
Text and images: Internet. The rooting of succulent plant cuttings is called "adventitious roots" because there is no fixed position where they emerge. According to the site where adventitious roots arise on the stem, they can be divided into two types. (Sometimes both types occur at the same time) 1...
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Types and Prevention Methods of Reproductive Disorders in Sows
Types and Prevention of Reproductive Disorders in Sows
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What are the commonly used rootstock types for jujube grafting?
Types of rootstocks used for jujube grafting
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What types can jujube fruits be divided into based on fruit shape
Classification by jujube fruit shape
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