1. On chrysanthemums, snapdragons and roses, it causes stem cankers . 2. Stem cankers form from the disease moving systemically through the plant.3. Additional stem canker and dieback are caused by the pathogen. 4. Stem cankers develop 1 to 3 years after branches die.5. Some of the symptoms of stem canker are branch splitting, gummosis and bark blistering. 6. Stem cankers are best treated by pruning out infection as soon as it is noticed.7. Relatively recently, Stem cankers were observed on sunflower plants growing in a field in Illinois. 8. These include leaf disease, stem canker , wood rot, and root rot-causing fungi. 9. This colonization leads to the invasion and destruction of the stem cortex, which leads to the formation of stem canker . 10. This suggests that there may be several species or biotypes of " Phomopsis " that cause stem canker worldwide.
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