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A mixed spray, consisting of bordeaux mixture and lead arsenate, 
is recommended in Switzerland. Plaoes where potato beetles are 
actually found should be treated with derris powder to kill any larvae 
falling to the ground. The derris treatment is the only one possible 
where there is danger of poisoning from vegetables.— Vfohlen (641 ) . 
Loohmaea saturalis (Thorns.) 
This insect injures heather in Scotland. An outbreak may be pre- 
vented by dusting with derris or pyrethrum while the infested area is 
still small. — Morlson (424 ). 
Lup erodes brunneus (Crotch), corn silk beetle 
In Louisiana the beetles are easily killed by arsenicals or cryo- 
lite, but dusts of niootine, derris, or pyrethrum are only partially 
effective. — Eddy (158) . 
Phyllotreta atra F., a flea beetle 
A derris dust (Kumex) containing 0.8 percent of rotenone kill- 
ed almost all the beetles on rape in field tests when it was applied 
at 22.5 pounds per acre.— Kaufmann and Frey (337). 
Phyllotreta spp. 
Kumex was effeotive against cabbage flea beetles in Germany.— 
Frey (200) . 
Repellent dusts containing naphthalene, and inseoticidal dusts 
containing nicotine or derris, have been used widely in recent years 
against turnip flea beetles on crucif ers in Britain. They have given 
satisfactory results but their effectiveness depends on proper tim- 
ing.— Miles (418). 
Phyllotreta undulata Kutsch. 
Kumex killed nearly 100 percent on rape in Germany.— Kaufmann 
and Frey (337) . 
Phyllotreta vittata disoedens Weise 
A oube-sulfur dust containing 0.4 percent of rotenone would ef- 
fectively control this flea beetle on the Texas Gulf Coast. A spray 
of cube powder and water was equally as effeotive as a cube dust. — 
Janes (316, 317). 
