4 ANNUAL REPORTS OF DEPARTMENT OP AGRICULTURE, 1051 
Pace 
1 other pollinating 
Crop producer- recognize their dependence on bees 
■ tial in cantaloup production 
ling queen bees distributed 
abundance Deeded for high yield of red doi 
r.. es selective in choice of pollens. 
Movi 
Ladino clover yields only pollen to visitii 
Bee-collected pollen usable for artificial pollination 
Habits of wild bees studied 61 
rder found 61 
insecticides da bo pollinating i 61 
may have physiological resi American foulbrood 61 
aviolet light aids disease detect 
• identification 
3 infesting potatoes 
Control of golden inued 2 
Golden nematode of potatoes -till confined to I.- 
l: ulatory measures function with Federal-State participati 
Further survey for potato rol nematode in Northwest :__ 
Japanese beetle 64 
Quarantine activities expanded 
Parasite of Japanese beetle well distri 
gical assay method for DDT and chlordane i 
veloped 
White-fringed beetles 
White-fringed beetle numbers reduced in all areas 
nsive farm-land areas treated to destroy white-fringed I i 
DDT treatments of soil qualify some crops for certification 
Alternate for DDT as certification treatment sought 
Foreign plant quarantine activities ■_ 
Injurious pests caught before entry 67 
( larriers inspected 
Mail inspected 
Imported plant products inspected. 
Plant materia] grown under postentry quarantine 
Imported plarit material treated 70 
Plants and plant products certified for export 70 
Transit inspection 70 
Inspection service in District of Columbia 71 
Destruction of Klamath weed by imported insects 71 
rol of plant diseases 72 
( lampaign against white pine blister rust continued ^- ) 
Blister rust under control over wide area 72 
Work efficiency increased by improved method- 72 
Ribes removed on nearly 1 100,000 acres. 72 
Ribes destroyed with chemical- 73 
Studies initiated on rust resistance in white pines 73 
Rusl found in new place- 73 
Barberry eradicated to control stem rust 74 
New races of rust cause local grain losses 74 
More than 20 million barberry plants killed 71 
Territory freed of barberries kept free 7 1 
New movie stimulates control 71 
Chemicals and power Bprayers reduce eradication costs 76 
Nurseries inspected for rust-susceptible barberry - 76 
:'iizat ion changed 75 
Campaign against insect vectors of peach diseases continued 76 
D< traction of leafhoppers may control spread of phony peach 
disease 76 
I arch findings applied to eradication of phony peach 76 
Peach mosaic at all-time Iom - 76 
now Louisiana and Texas still free of citrus canker - - 7, 
■. i im di i ase reported from three more States . — •_* 
nization of the Bun and Plant Quarantine - 7 s * 
