Question

Some tree copper deficiency cause blister n deep slits in bark which excuds gum this desease is known

Answer 1

In some trees, copper deficiency may cause blisters and deep slits in the bark from which exudes gum. This disease is known as

 -Dieback

Dieback may refer to a number of plant problems and diseases including:

Forest dieback caused by acid rain, heavy metal pollution, or imported pathogens

The death of regions of a plant or similar organism caused by physical damage, such as from pruning

Those caused by the genus Eutypa, such as Eutypa dieback

Those caused by the genus Phytophthora, such as Phytophthora cinnamomi dieback

Those caused by the genus Seiridium, such as Seiridium cardinale dieback or cypress canker