Tolerance to common spear rot
A very common disorder that affects the spear region in young palms is the so-called 'common spear rot’, which is associated with an arching of the rachis. This condition has a strong genetic component and, as with spear rot, there is also a strong site effect that determines the degree of incidence and severity. In soils with drainage limitations, the incidence may be high, even when one of the progenitors has shown tolerance to another condition. ASD has made significant progress in eliminating the palms that confer susceptibility to this disorder from its commercial seed production program.
Two disorders that can be common in young oil palms: common spear rot/leaf arching (left) and symptoms associated with a severe boron deficiency (right).