N U USER Y 1 N S J *1^ CTi ( ) N 
/ 
and Orchard Inspection Services in the various states, particularly 
in those states where lumber interests are represented. 
For four years we have been watching a planting of imported 
pines in a Minnesota nursery and, up to date, have not observed 
the appearance of this disease. Nevertheless, we plan for the com- 
ing season a careful survey of all nursery stands of species of pines 
as well as those of currants and gooseberries, besides a checking 
up of all shipments of these forms into Minnesota, and far as pos- 
sible, their ultimate distribution therein. To do this properly, 
generous cooperation upon the part of the Plant Pathology Division 
of the Experiment Station will be necessary. 
At a recent conference (March 2, while this report was with 
the printers) of representatives of the Minnesota Forestry Board, 
the Minnesota Forest Service, the College of Forestry, the Minne- 
sota State Forestry Association, the Horticultural and Plant Pa- 
thology Divisions of the Minnesota Experiment Station, and the 
Minnesota Nursery Inspector, a resolution was unanimously passed 
to the effect that we strongly urge the Eederal Quarantine Board to 
quarantine those areas (as regards shipment of pines and Ribes) 
which are known to be infested with white pine blister rust, and the 
Secretary of the Conference was also instructed to write to the 
Minnesota senators and representatives, urging them to act favor- 
ably upon H. R. 9802, introduced by Mr. Wason. 
Since large consignments of pines, currants, and gooseberries 
have probably been received from infected areas, by large nurseries 
in the United States, nurserymen and other importers are urged to 
avoid placing orders for pines or currants or gooseberries at the 
present time with wholesale dealers. In this connection it may be 
stated that a quarantine is just about to be issued by the Federal 
Horticultural Board, preventing the importation of five-leafed pines, 
as well as all currants and gooseberries from Canada and New- 
foundland. This disease is very slow to appear on plantings of 
pine. Its first appearance dates possibly three years after the 
pines are set out, in this climate, although it might not appear until 
considerably later. It is recognized by yellow spots on the bark 
of the pine with irregular white edges, first appearing as irregular 
swellings or blisters, which swellings or blisters later break open. 
The yellow color is caused by the presence of the powdery-like, 
yellow spores. On currants and gooseberries, it is observed in the 
form of very small, yellowish powdery masses on the under side 
of the leaves about the size of the head of a pin. It must not be 
confounded with the other yellow spores seen commonly on our 
gooseberries, the patches of Avhich are much larger. 
