Ash yellows MLOs have not been detected in naturally infected plants other than ash and lilac. Known distribution of ash yellows, 1994. Symptoms Figure 3. Tufted foliage at tips of twigs and crown thinning. Symptoms of ash yellows vary with ash species.
White ash sustains permanent and often rapid decline in tree growth.
Subnormal leaf size and light green leaf color, upturned leaf margins, and premature fall coloration are common. Witches'-brooms are clusters of upright spindly shoots. Witches'-brooms usually develop near the soil line but occasionally are found several feet up the trunk. Radial growth loss associated with MLO infection has been detected in green ash. Deliquescent branching showing loss of apically dominant growth on slowly growing lateral branches.