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The cells of the Dieffenbachia plant contain needle-shaped calcium oxalate crystals called raphides. If a leaf is chewed, these crystals can cause a temporary burning sensation and erythema. In rare cases, edema of tissues exposed to the plant has been reported. Mastication and ingestion generally result in only mild symptoms. [14]
Ficus elastica, or the rubber plant, is a common house plant but is also a tree which can grow up to 30–40 metres (98–131 ft) tall in the wild. Aglaonema (Chinese evergreen) Alocasia and Colocasia spp. (elephant ear) Anthurium spp. Aphelandra squarrosa (zebra plant) Araucaria heterophylla (Norfolk Island pine) Aspidistra elatior (cast iron ...
Symptoms will often appear overnight, affecting many types of plants. Leaves and stems may turn black, and buds and flowers may be discoloured, and frosted blooms may not produce fruit. Many annual plants, or plants grown in frost free areas, can suffer from damage when the air temperature drops below 40 degrees Fahrenheit (4 degrees Celsius).
Alternaria alternata is a fungus causing leaf spots, rots, and blights on many plant parts, and other diseases. It is an opportunistic [citation needed] pathogen on over 380 host species of plant. It can also cause upper respiratory tract infections [1] and asthma in humans with compromised immunity. [2]
Leaf spots are visible symptoms of virus infections on plants, and are referred to as systemic symptoms. [7] In systematic virus infections leaf spots caused by viruses show a loss of green colour in leaves, due to chlorosis which is a repression of chlorophyll development. [ 1 ]
Anthurium clarinervium is a species of flowering plant in the family Araceae native to Chiapas, Mexico. The Anthurium genus is known to contain approximately 1,000 species, resulting in one of the most diverse Central American tropical plant genera.
Most fungus gnats are weak fliers, and can often be seen walking rapidly over plants and soil, rather than flying. However, when airborne, the gnats may be quite annoying to humans by flying into their faces, eyes, and noses, both indoors and outdoors. [4] [5] These flies are sometimes confused with drain flies. [6]
Virescence is the abnormal development of green pigmentation in plant parts that are not normally green, like shoots or flowers (in which case it is known as floral virescence). [1] Virescence is closely associated with phyllody (the abnormal development of flower parts into leaves ) and witch's broom (the abnormal growth of a dense mass of ...