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PLANT QUARANTINE AND CONTROL ADMINISTRATION [April-June, 
Washing, hot water, or carton disulphide dip. — 
Hemerocallis dumortieri Early daylily. 
Hemerocallis fulva.. Tawny daylily. 
Hemerocallis citrina Citron daylily. 
Iris cristata Crested iris. 
Iris germanica German iris. 
Iris japonica.. _' Fringed iris. 
Iris ochroleuca Yellowband iris. 
Iris pseudacorus Yellowflag iris. 
Iris sibirica Siberian iris. 
Paeonia spp Peony. 
Rheum spp Rhubarb. 
Small fruits 
The only small fruit which has been treated is the cultivated blueberry, 
Vaccinium spp., which can be disinfected by submerging the roots in hot water 
while the plants are dormant. 
C. Deciduous Ornamental Shrubs 
The soil about the roots of deciduous shrubs can be disinfected safely only 
when the plants are dormant. In this state, they can be treated successfully 
by washing the soil from the roots, by dipping in dilute carbon disulphide emul- 
sion, and by treating with carbon disulphide emulsion in the field. The follow- 
ing species of shrubs may be treated in this manner: 
Amygdalus (Prunus) persica^ Flowering peach. 
Azalea mollis Chinese azalea. 
Azalea pontica Pontic azalea. 
Berberis thunbergi. Japanese barberry. 
Buddleia davidi Orange-eye butterflybush. 
Callicarpa purpurea Chinese beautyberry. 
Calluna vulgaris Heather. 
Calycanthus floridus Common sweetshrub. 
Cercis chinensis (japonica) Chinese redbud. 
Clethra alnifolia Summersweet. 
Cornus alba Tartarian dogwood. 
Cornus florida Flowering dogwood. 
Cornus stolonifera Red-osier dogwood. 
Crataegus oxyacantha English hawthorn. 
Cydonia japonica Flowering quince. 
Deutzia gracilis Slender deutzia. 
Deutzia lemoinei Lemoine deutzia. 
Deutzia scabra Fuzzy deutzia. 
Elsholtzia stauntoni Elsholtzia. 
Euonymus alatus Winged euonymus. 
Euonymus europeus European burningbush. 
Euonymus japonicus Evergreen burningbush. 
Exochorda grandiflora Common pearlbush. 
Forsythia suspensa.. Weeping forsythia. 
Forsythia suspensa fortunei (F. fortunei) Fortune forsythia. 
Forsythia viridissima. Greenstem forsythia. 
Halesia tetraptera... Great silverbell. 
Hamamelis virginiana Common witch-hazel. 
Hibiscus syriacus Shrub-althea. 
Hydrangea arborescens Smooth hydrangea. 
Hydrangea opuloides House hydrangea. 
Hydrangea paniculata. Panicle hydrangea. 
Hydrangea quercifolia. Oakleaf hydrangea. 
Hypericum calycinum St. Johnswort. 
Hypericum densiflorum St. Johnswort. 
Hypericum patulum.. Japanese hypericum. 
Ligustrum ibota Ibota privet. 
Lespedeza bicolor Shrub bushclover. 
Ligustrum ovalifolium California privet. 
Lonicera fragranlissima Winter honeysuckle. 
Lonicera ledebouri... Honeysuckle. 
Lonicera morrowi.. Morrow honeysuckle. 
Lonicera tatarica Tatarian honeysuckle. 
Malus atrosanguinea Carmine crab. 
Malus floribunda _ Japanese flowering crab. 
Malus ioensis Prairie crab. 
Malus niedzwetzkyana Redvein crab. 
Malus scheidcclceri Scheidecker crab. 
Mauls speclabilis Chinese flowering crab. 
Philadelphus coronarius . Sweet mock orange. 
Philadelphus grandi/lorus Big scentless mockorange. 
Philadelphus nivalis Snowbank mockorange. 
Prunus cerasifera Myrobalan plum. 
Prunus glandulosa Double pinkflowering almond. 
Prunus triloba Flowering plum. 
