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2 ημέρες πριν · Little is known regarding the genes, compounds and physiological alternations that take place upon infection of black knot disease. This research aimed to unravel the genetic mechanism responsible for the resistance of Japanese plum (Prunus salicina L.) trees against black knot (Apiosporina morbosa Schwein.) using a Genome-Wide Association Study.. Genotyping by Sequencing (GBS) was combined ...
The most obvious sign of black knot is the hard, black, swollen galls, commonly called knots, on branches and twigs. Black knot also infects fruit spurs, and sometimes trunks. Infected trees may produce few flowers or fruit.
appearance of affected landscape trees. Black knot appears to be a minor problem on Prunus spp. found in forest situations, where susceptible trees are surrounded by many non-susceptible species of trees. Black Knot is mainly a problem in North America (Canada, the United States and Mexico) where it is indigenous. A record from 1979 indicated
Caused by a fungus (Apiosporina morbosa), black knot is a common disease that affects many types of fruit trees, but mainly wild and cultivated plum and cherry trees. It creates knobby dark growths on the trunk and branches that may eventually lead to the tree’s death.
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.
Black knot is a fungal disease, caused by Apiosporina morbosa, that attacks stone fruit species in the genus Prunus. Black knot is known for irregular, thick, black swellings on limbs. Severe infestations can reduce production drastically, reducing infected trees to a worthless condition in a few years if the disease is not addressed.
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 75°F).
