Plum Tree Diseases: Indentifying Common Plum …

Black knot | UMN Extension

ウェブ4 日前 · Black knot is a common fungal disease of Prunus trees including ornamental, edible, and native plum and cherry trees. Hard swollen black galls (tumor like growths) form on branches and occasionally on trunks. Many Prunus trees tolerate black knot.

Fixes For Black Knot Tree Diseases: What To Do When ...

ウェブ2021年3月1日 · Black knot fungus (Apiosporina morbosa) is primarily a disease of plum and cherry trees, although it can also infest other stone fruit, such as apricots and peaches, as well as ornamental Prunus species. Black knot disease spreads in spring. On rainy days, the …

ATTRA Identification Sheet: Plum Diseases

ウェブTwo related fungi (Leucocytospora cincta/L. leucostoma) that incite cytospora canker invade sites where damage has occurred due to mechanical injury, cold, poor pruning techniques, improper pruning time, borers, or other causes. The first visible symptom is the oozing of …

Black Knot - Wisconsin Horticulture

ウェブBlack knot is caused by the fungus Apiosporina morbosa, which survives in black knot galls on infected Prunus trees. Spores of the fungus are released from these galls and infect new branches in late spring or early summer during periods of wet weather and mild temperatures (55°F to …

Plums With Black Knot: How To Treat Plum Black Knot ...

ウェブ2021年12月16日 · Plum black knot disease is a nightmare for gardeners, since it can easily result in the death of plum and cherry trees. It is caused by a fungus called Apiosporina morbosa or Dibotryon morbosum . Most cultivated plum trees are susceptible to black knot, including American, …