9 



of salt to 1 Ib. of Paris green. We ha ve not yet tested this. 



Lead arsenate. — This is a thick white paste. It is used 

 in place of Paris green for spraying on plants to kill biting 

 insects. It is not quite so active a poisou as Paris green but 

 it has the advantage of not burning the plants. It gave 

 excelent results in sinall experiments last year atthe Estación 

 Agronómica. We recommend the following formula. 



Lead arsenate 8 lbs. 



Water 50 gals. 



Put the lead arsenate hito a cloth and mix with the 

 water by squeezing through the cloth. Apply with a spray 

 pump wich has a good agitator. No harm is done if more of 

 the lead arsenate is used than is required by this formula. 



París green.— Somewhat less expensive than lead arsen- 

 ate and probably nearly as effective in skillful hands is the 

 following. 



Paris green Vi Ib. 



Lime paste 5 ,, 



W T ater 50 gals. 



The Paris green may be wet by putting the dry powder 

 in a bottle of convenient size with water and shaking 

 thoroughly. Mix the ingredients thoroughly and apply with 

 a spray pump having a good agitator. We have applied 

 heavier doses than the above without injuring the tobáceo 

 seriotisly; but we consider the above proportion the best for 

 general use on seedbeds. 



REMARKS 



* 



This circular does not undertake to give instructions for 

 making tobáceo seedbeds. There are ma-ny ways of making 

 them and sometimes what we think to be the worst way 

 may succeed better than the best. We wish to cali the atten- 



