Abstract
With every importation of plants there is a risk of bringing plant pests. America needs plants. Quarantine 37 has developed a system by which propagating stock can be brought in under safeguards and the plants produced here. The quarantine has been in effect four and one-half years. Three thousand, one hundred and seventeen special permits have been issued: importation has been made under 2,205; 291 are still valid; 55,542,302 plants have been authorized entry; and 29, 88.5,712imported. 18,796 varieties have been requested; and of these fl3 1/10% have been authorized entry as unavailable for propagation in America. American plant pathologists and entomologists have the opportunity of assisting this resulting great American horticultural development by studying the pathological and entomological problems faced by American plant growers.
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