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Bacterial soft rot on taro (Colocasia esculenta) Bacterial soft rots are caused by several types of bacteria, but most commonly by species of gram-negative bacteria, Erwinia, Pectobacterium, and Pseudomonas. It is a destructive disease of fruits, vegetables, and ornamentals found worldwide, and affects genera from nearly all the plant families.
Bacterial diseases (including phytoplasma) Bacterial Canker of Tomato: Clavibacter michiganensis subsp. michiganensis: Bacterial speck: Pseudomonas syringae pv. tomato: Bacterial spot: Xanthomonas campestris pv. vesicatoria: Bacterial stem rot and fruit rot Erwinia carotovora subsp. carotovora: Bacterial wilt: Ralstonia solanacearum: Pith ...
Bacterial wilt caused by R. solanacearum is of economic importance because it infects over 250 plant species in over 50 families. As of 2007, this pathogen has affected over 450 host species representing 54 plant families due to its broad host range around the world. [29] The disease is known as southern wilt, bacterial wilt, and brown rot of ...
A. a. f. sp. lycopersici (AAL) infects only certain cultivars of tomato plants and is often referred to as Alternaria stem canker of tomato. [3] AAL ' s main symptom is cankers in the stem. It resides in seeds and seedlings, and is often spread by spores as they become airborne and land on plants. It can also spread throughout other plants. [4]
When the infection occurs in an early stage of the tomato plant there may be wilting on leaves because Clavibacter michiganensis subsp. michiganensis enter the plant by wounds, including root wounds, and if the bacterium gets to the xylem then a systemic infection is likely that may plug the xylem vessels.
Symptoms of bacterial crown rot begin as angular water-soaked lesions on leaf surfaces and eventually spread through veins and petioles to cause death to the canopy layer of leaves. Water-soaked cankers also appear on the stem, causing it to collapse, and spread to meristems, killing the growing tips of the plant (Webb 1985; Fullerton et al ...
Alternaria solani is a fungal pathogen that produces a disease in tomato and potato plants called early blight. The pathogen produces distinctive "bullseye" patterned leaf spots and can also cause stem lesions and fruit rot on tomato and tuber blight on potato. Despite the name "early", foliar symptoms usually occur on older leaves. [3]
Xanthomonas campestris pv.vesicatoria is a bacterium that causes bacterial leaf spot (BLS) on peppers and tomatoes. It is a gram-negative and rod-shaped. [1] It causes symptoms throughout the above-ground portion of the plant including leaf spots, fruit spots and stem cankers.