Marginal browning with necrotic spots and irregular interveinal lesions later in disease development:
- Bacterial canker | See factsheet for more information
Symptoms: brown marginal lesions with yellow border to the inside that later develop interveinally as irregular lesions. Yellowing leaves on wilting plants will remain attached to stems.
Other yellowing, necrosis, and wilting of leaves:
- Bacterial pith necrosis | See factsheet for more information (LIHREC)
Symptoms: yellowing and wilting of leaves, blackening and enlarging of petioles and nodes. This progresses to top of the plant.
- Fusarium foot rot (F. solani)
Symptoms: interveinal chlorosis and necrosis of leaves later turning brown.
- Fusarium crown and root rot (F. oxysporum f. sp. radicis-lycopersici, 3 races)
Symptoms: yellowing of older leaves and progresses to the top of plants after mature green fruit stages.
- Fusarium wilt (F. oxysporum f. sp. lycopersici, 3 races)
Symptoms: begins as yellowing of oldest leaves and progresses upwards, often with yellowing on one side of the leaf or branch. Brown vascular tissue in the stem at the crown and above.
- Verticillium wilt
Symptoms: yellowing with a V-shaped pattern turning brown, with brown vascular tissue inside stem at crown of the plant.
More information/prepared by:
- For more information, please contact:
Meg McGrath – mtm3@cornell.edu & Chris Smart – cds14@cornell.edu - Originally prepared for Vegetable MD Online by Thomas A. Zitter.