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which are not provided with the certificates of the official phytosan- 
itary service or plant protection, .servic-e- of- the 'exporting country, 
may enter into free traffic if the interested- person produces the cer- 
tificate of a Polish plant protection service, according to which the 
shipment in question is free from injurious plant' diseases and pests. 
Art. 15. Seeds of clover,, alfalfa, sand clover, sweetclover, 
birdsfoot trefoil, and timothy which are not provided with a certifi- 
cate (Model 4) of a foreign seed testing station, may be released int» 
free traffic on the basis of a certificate issued by one *f the author- 
ized Polish seed control stations. The contents of the certificate must 
correspond to Model 4. 
Art. 16. Shipments of seeds of clover, alfalfa, sand clover, 
sweetclover, birdsfoot trefoil, and timothy which are provided with a 
certificate (Model 4) issued by a foreign seed testing station, may be 
inspected again at a customs office in Poland. If this inspection shows 
the seed to be contaminated with dodder ( Cuscuta ) it may not be released 
into free traffic. 
Art. 17. The regulations on the coloring and certification cf the 
purity of seeds do not extend to commercial samples of a gross weight of 
100 g or less. These may be imported without restriction. 
APPENDIX A 
(Appendix V to the Decree of Oct. 4, 1933) 
PLANT PESTS AMD DISEASES 
The certificate referred to in article £ must affirm freedom of 
the respective shipments from, the following-named pests and diseases: 
Plant diseases 
Bacterium ( Pseud omonas , Phytomonas ) hyacinthi , 
yellow disease of hyacinths; 
Bacterium tumefaciens , crown gall ; 
Pi qyrao s pha or i a ( Didymell a) a'pplanata ; 
Pla sm opara ( Pse udoperonoapora ) humuli , hop 
downy miluew; 
Sept^ria aaal eae , leaf spot of azalea and 
rhododendron; 
Virus diseases of hops. 
Insect pests 
Aspidi^tus ostreaef ormis , European fruit scale; 
^spidiotus perr.iciosus , San Jose scale ; 
( Doryphora ) Leptinotarsa decemlineata , Colorado 
potato beetle; 
