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  2. Citrus greening disease - Wikipedia

    en.wikipedia.org/wiki/Citrus_greening_disease

    Citrus greening is distinguished by the common symptoms of yellowing of the veins and adjacent tissues (hence the "yellow dragon" name given by observing Chaozhou farmers as early as the 1870s [1]); followed by splotchy mottling of the entire leaf, premature defoliation, dieback of twigs, decay of feeder rootlets and lateral roots, and decline in vigor, ultimately followed by the death of the ...

  3. Papaya ringspot virus - Wikipedia

    en.wikipedia.org/wiki/Papaya_ringspot_virus

    Symptoms are typical of viral diseases. Papaya exhibits yellowing, leaf distortion, and severe mosaic. Oily or water-soaked spots and streaks appear on the trunk and petioles. The fruit will exhibit bumps and the classic "ringspot". A severe isolate of PRSV has also been shown to cause tissue necrosis. [8]

  4. Jaundice - Wikipedia

    en.wikipedia.org/wiki/Jaundice

    Jaundice, also known as icterus, is a yellowish or greenish pigmentation of the skin and sclera due to high bilirubin levels. [3] [6] Jaundice in adults is typically a sign indicating the presence of underlying diseases involving abnormal heme metabolism, liver dysfunction, or biliary-tract obstruction. [7]

  5. Cucumber mosaic virus - Wikipedia

    en.wikipedia.org/wiki/Cucumber_mosaic_virus

    Symptoms seen with this virus include leaf mosaic or mottling (Fig. 1), yellowing, ringspots, stunting, and leaf, [12] flower and fruit distortion. CMV also induces a type of symptom on leaves known as the "shoestring" effect on many host species. This effect causes young leaves to appear narrow and the entire plant to be stunted. [13]

  6. Flavescence dorée - Wikipedia

    en.wikipedia.org/wiki/Flavescence_dorée

    The incubation period between infection and obvious symptoms is usually one year or more, depending on the response of the plant to both pathogen and environmental circumstances. [1] Flavescence dorée has the following symptoms: [1] leaves become yellow or red, depending on the variety; downward rolling of leaves; drying of stems and grapes

  7. Fusarium wilt - Wikipedia

    en.wikipedia.org/wiki/Fusarium_wilt

    Fusarium wilt is a common vascular wilt fungal disease, exhibiting symptoms similar to Verticillium wilt. This disease has been investigated extensively since the early years of this century. The pathogen that causes Fusarium wilt is Fusarium oxysporum (F. oxysporum). [1] The species is further divided into formae speciales based on host plant.

  8. 11 Top COVID Symptoms People Are Experiencing During the ...

    www.aol.com/11-top-covid-symptoms-people...

    The symptoms are similar to other COVID strains. Being sick and experiencing a chronic cough, elevated fever, sore throat or a runny nose should prompt you to get a COVID-19 test to ensure you are ...

  9. Leaf spot - Wikipedia

    en.wikipedia.org/wiki/Leaf_spot

    Symptoms can overlap across causal agents, however differing signs and symptoms of certain pathogens can lead to the diagnosis of the type of leaf spot disease. Prolonged wet and humid conditions promote leaf spot disease and most pathogens are spread by wind, splashing rain or irrigation that carry the disease to other leaves.