Rots (bacterial)
Rots comprise a diverse group of plant diseases characterized by the breakdown of tissues, loss of structure, discoloration, and frequently a foul odor. The causative agents are primarily phytopathogenic fungi, bacteria, or oomycetes that thrive in specific environmental niches. These diseases are categorized by their location on the host, commonly manifesting as root, stem, fruit, or crown rots.
What the section contains
Bacterial soft rot
Pseudomonas marginalis
2 products
Alphaproteobacteria
Alphaproteobacteria
Bacterial bud rot
Erwinia
Bacterial bulb rot
Pseudomonas aeruginosa
Bacterial ring rot of potato
Clavibacter sepedonicus
Bacterial root rot
Pseudomonas radiciperda
Bacterial seed rot
Bacillus subtilis
Bacterial soft rot
Pectobacterium carotovora
Bacterial soft rot
Pectobacterium carotovorum
Bacterial soft rot
Dickeya chrysanthemi
Bacterial soft rot
Dickeya dadantii
Bacterial stalk rot of corn
Erwinia carotovora
Betaproteobacteria
Betaproteobacteria
Center rot
Pantoea spp.
Deltaproteobacteria
Deltaproteobacteria
Dickeya
Dickeya
Epsilonproteobacteria
Epsilonproteobacteria
Gammaproteobacteria
Gammaproteobacteria
Microterricola
Microterricola
Microterricola pindariensis
Microterricola pindariensis
Proteobacterial plant diseases
Proteobacteria
Proteus mirabilis
Proteus mirabilis
Proteus vulgaris
Proteus vulgaris
Rhizomatosis (bacterial wilt)
Erwinia spp.
Soft rot bacteriosis
Proteus
Soil rot of sweet potato
Streptomyces ipomoeae
Witches broom of broom
Sarothamnus witches
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Rots (bacterial)
Virtually all agricultural and horticultural crops are susceptible to various forms of rot, including cereals, vegetables, fruit trees, and ornamental plants. These pathogens are particularly destructive during periods of high humidity or when plants are subjected to environmental stress, which compromises their natural defense mechanisms and makes them easier targets for infection.
Common symptoms include the development of water-soaked lesions, softening and disintegration of plant tissue, and the visible presence of fungal structures like mycelium or spores. Plants affected by root rot typically exhibit stunted growth, chlorosis, wilting, and in severe cases, death. Fruit rots often render the produce unmarketable and can cause rapid secondary spread within storage facilities.
Disease development is strongly linked to moisture availability, poor soil aeration, and high temperatures. Pathogens often overwinter in soil debris or persist on alternative host plants. Mechanical damage to roots or stems during cultivation, harvesting, or insect feeding acts as a critical entry point for these opportunistic pathogens, facilitating the start of the infectious process.
The economic impact of rots is significant due to potential total loss of yield and compromised storage longevity. Successful control requires an integrated approach including crop rotation, the use of disease-free propagation material, soil amendments for better drainage, and appropriate chemical or biological fungicide treatments to mitigate the infection pressure in the field.
- Maintaining optimal soil drainage and airflow.
- Sanitation by removing infected plant debris.
- Monitoring climate parameters in storage facilities.
- Applying preventive fungicide and bactericide sprays.
- Utilizing disease-resistant or tolerant crop varieties.