Necrosis occurs as gradual drying of interveinal areas followed by drying of the remaining tissues. Bright coloration is not common in chlorotic leaves . . . . . Chlorosis is not the first visible symptom. Leaf edges do not usually curl upward . . . . . Old or recently matured leaves may show interveinal chlorosis.
Leaflets sometime show small black interveinal nechrotic dots.
Tip and marginal necrosis is absent. Only the oldest leaves of severly damaged plants show chlorosis. Necrosis appears as irregular sunken necrotic spots which may be veinal, interveinal, or adjacent to veins. Young leaflets sometimes show small black interveinal necrotic spots. Chlorosis general, so that veins do not remain green.