- 480 - 
■ Formula 24 a Formula 24 c 
Miscible oil 5 gal. Miscible oil 3 gal. 
Black Leaf 40 1 pt. Black Leaf 40 1.5 pt. 
Water to make 200 gal. Water to make 200 gal. 
Formula 27 Formula 27 a 
Tobacco extract 40^ Nicotine sulphate 40-^ — 1 pt. 
(O 
nicotine sulphate 1 pt. Dry "billboard prste 
Fish-oil sorp 4 to 5 lb. .Water --150 gal. 
Water 100 to 150 gal. 
Eicotine dusts, called "Nicodust" by R. E. Smith, contained 2, 4, 
5, 6, and 10 percent of Black Leaf 40. 
For fungus diseases and aphids, a 40 percent nicotine sul- 
phate may be added to sulphur sprays, and a sulphur nicodust may 
also be used for mildew and aphids (p. 37). 
The preceding tobacco preparations were recommended against 
the following insects: 
Apple aphids ( Aphis pomi DeG. and A. malif oliae Fitch) - 
formula 24 or 27, or a 5 to 6^ nicodust (p. 5). 
Woolly apple aphid (F riosoma lanifi-erum Hausm.) - formula 27 (p. 6) 
Asparagus beetle (Cri oceris asparagi Linn.) - formula 24 or 27, 
or a 6fo nicodust (p. S). 
Bean aphid ( Aphis rumicis Linn.) and bean thrips ( Heliothrips 
fasciatus Perg.) - formula 27 a, or a 5^ nicodust (p. 10, 11). 
Cabbage aphid ( Aphi s brassiere Linn.) - formula 24 or 27; nico- 
dust gives only partial control ( p. 13) . 
Cabbage worm ( Pontia rapae Linn. ) - formula 27 or a 5fo nico- 
dust (p. 14) . 
Aphids on celery ( Phopalc siphum persicae Sulz. and Siphocoryne 
caproae Fab.) and cherry aphid (Myzus cerasi Fabr. ) - formula 27 or 
bfo nicodust (p. 14, 15). 
Cherry slug ( Calirpa cerasi Linn.) - 2 or 5$ nicodust (p. 15). 
Chrysanthemum gall fly (Dia rthronomyia hyppgaoa Low.) - formula 
27 (p. 16). 
Chrysanthemum leaf miner ( Phytomyz a chrysanthem i Kow) . - maggots 
are killed by applying 40-porcent nicotine sulphate (1 to 600) (p. 16). 
Citrus thrips ( Scirtothrips citri Moult.) - formula 24 or 6$ 
nicodust (p. 18) . 
Cucumber beetles (Dirbrotica soror Les. and D. trivittata Mann) -1 
