There were two distinct periods of woolly trapped, only 16 trees were uprooted, the five 



apple aphid migration from roots to above- with njmiphs and eleven without nymphs. The 



ground portions of the tree (Table 1). Few aphid level of root infestation was the same for trees 



nymphs were trapped between green tip and with and without trapped n5anphs. Therefore, 



half inch green; five trees had one nymph each, trapping for migrating woolly apple aphid 



These nymphs were a different form than nsmiphs during the green tip to half inch green 



nymphs trapped later and non-migrating period would not be a useful sampling method, 



nymphs found in the summer. These No nymphs were trapped during the half 



earlynymphs were black and had httle wax (the inch green to pink sample period. First-instar 



chEiracteristic white woolly covering), whereas nymphs were trapped on several trees that were 



the typical form for first-instar nymphs is hght banded during both the pink to petal-fall and the 



purple with a waxy covering over the body and green-tip to petal-fall sample periods (Table 1). 



obvious tufts of wax. Because of the small In both sets oftrees the aphid nsonphs appeared 



number of trees on which early nymphs were to have been trapped recently and were either 



Fruit Notes, Fall, 1993 



