METHODS OF CONTROLLING TOBACCO INSECTS. 17 



2. If sod land has not been treated as recommended above, use the 



poisoned bait four or five days before setting tobacco, or drop 

 the bait about each hill directly after setting tobacco. 



FLEA-BEETLES. 



3. Canvas seed beds tightly with strong whole canvas and thus 



prevent entry of the beetles. 



4. Spray infested beds with arsenate of lead at the rate of 1 pound 



paste form (or h pound powdered form) to 12 gallons of water. 



5. If flea-beetles are very numerous at setting time dip the tops of 



the plants in the arsenate of lead recommended in No. 4. 



6. If flea-beetles continue to injure plants after setting, spray with 



arsenate of lead at the strength given above. 



TOBACCO HORN WORMS. 



7. Nearly all the destructive late July and August " shower'' of 



worms is the direct offspring of tobacco moths that have issued 

 from hibernation during late July and early August. 

 . 8. Over 60 per cent of the hibernating generation of moths emerge 



from hibernation late in July and in August. 

 9. Fall plowing of land that was in tobacco during the year will 

 destroy more than half of the hibernating generation and will 

 thereby reduce proportionately the number of tobacco worms 

 that will appear the next year late in July and in August. 



10. Poison worms upon tobacco plants by dusting with Paris green. 



11. Poison tobacco moths by placing a few drops of arsenide of 



cobalt (flystone) solution in "jimson" blooms. 



Approved : 



James Wilson, 



Secretary of Agriculture. 

 Washington, D. C, April 18, 1910. 



o 



