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Black rot of grape. Grape black rot is a fungal disease caused by an ascomycetous fungus, Guignardia bidwellii, that attacks grape vines during hot and humid weather. “Grape black rot originated in eastern North America, but now occurs in portions of Europe, South America, and Asia. It can cause complete crop loss in warm, humid climates, but ...
A leaf spot is a limited, discoloured, diseased area of a leaf that is caused by fungal, bacterial or viral plant diseases, or by injuries from nematodes, insects, environmental factors, toxicity or herbicides. These discoloured spots or lesions often have a centre of necrosis (cell death). [1] Symptoms can overlap across causal agents, however ...
The white spots may reach more than 1 mm in diameter and are easily recognized on skin and fins whereas trophonts attached to the gills are hard to see due to the gill cover . Skin: Ich infections are usually visible as one or several characteristic white spots on the body or fins of the fish. The white spots are single cells called trophonts ...
Citrus black spot is a fungal disease caused by Phyllosticta citricarpa (previously known as Guignardia citricarpa). This Ascomycete fungus affects citrus plants throughout subtropical climates, causing a reduction in both fruit quantity and quality. [citation needed]
Lichen sclerosus ( LS) is a chronic, inflammatory skin disease of unknown cause which can affect any body part of any person but has a strong preference for the genitals (penis, vulva) and is also known as balanitis xerotica obliterans ( BXO) when it affects the penis. Lichen sclerosus is not contagious. There is a well-documented increase of ...
A little brown bat with white-nose syndrome. White-nose syndrome ( WNS) is a fungal disease in North American bats which has resulted in the dramatic decrease of the bat population in the United States and Canada, reportedly killing millions as of 2018. [1] The condition is named for a distinctive fungal growth around the muzzles and on the ...
List of durian diseases and pests. Black garden ants ( Lasius niger) eating a durian at a market in Pulilan, Bulacan. Note also the fuzzy white scale insect in the center. Durians are an agricultural product affected by many plant pathogens and pests. Most of the information here concerns Durio zibethinus, the major commercial species, but a ...
Gymnosporangium juniperi-virginianae is a plant pathogen that causes cedar-apple rust. [1] In virtually any location where apples or crabapples ( Malus) and eastern red cedar ( Juniperus virginiana) coexist, cedar apple rust can be a destructive or disfiguring disease on both the apples and cedars. Apples, crabapples, and eastern red cedar are ...