Table 2. Degree of foliar phytotoxicity displayed by 15 nut tree species three weeks after spraying with 3% Sunspray 6E horticultural oil. Results are given as average percentage of leaflets damaged per compound leaf.
Plant species% Damage
Juglans nigra (black walnut)  20
J. nigra ’Mintle’    0
J. nigra ’Sparrow’    0
J. nigra ’McKiniston’    0
J. ailanthifolla var. cordiformis (Japanese walnut)  50
J. ailanthifolia var. cordiformis ’Schubert’100
J. ailanthifolla var. cordiformis ’Mitchell’100
J. cinerea ’Herrick’ (Butternut)100
J. cinerea ’Kenworthy’100
Castanea mollissima (Chinese chestnut)    0
C. mollissima ’Kuling’    0
Carya illinoinsis ’major’ (northern pecan)    0
C. illinoinsis + C. laciniosa ’Bixby’ (shellbark
hickory)    0
C. illinoinsis + C. ovata ’Burton’ (shagbark
hickory)    0
Pterocarya stenoptera (Chinese wingnut)    0