A disease caused by the bacteria Pseudomonas syringae and is characterized by the formation of rough woody-like galls on branches and trunks that are approximately 1 inch thick. Defoliation and reduced yield in mature trees occurs, and young infect trees might die. The bacteria penetrates through cracks and openings in the plant’s tissues provided by freezing injuries (or pruning) and is easily spread by water splashes. The infections will likely occur during wintertime, while the development of knots will take place later on such as spring or summer. All varieties are susceptible.
التقليم: عليك إزالة أجزاء النبات المصابة عند الإمكان.
ينبغي تعقيم المعدات والعمال الذين يعملون في المناطق المصابة بهدف منع المرض من الانتشار.
المبيدات الفطرية التي تحتوي على النحاس.
*Names marked in red are considered to be highly poisonous to beneficial insects.
*Names marked in green are considered to be organic and IPM (integrated pest management) compatible.