Insects liko horry noths, flon ]>cet3.Gs, and gmpc rootworm l&eetles, 

 arc controlled by adding a .poison to the spray, such as arsenate of lead* 

 AbQuiffc 3 pounds of the powder were ad#od to 100 gallons of spray at a cost of 

 about 55 cents • An arseriical poison \7as gonqraily added to the Boi^ieaux spraj^ 

 in the Chautauqua-Erie ^*€ipe bolt and in Michigan • It \7as used in about half 

 the quantity of spray material applied in ilrkansas* 



Soap is* added to, increase the spreading and adhesive qualities of the 

 spray as well as a contact insecticide and was used in over one half the spray 

 material applied in the. Michigan and Arkansas vineyards. ' . 



Nicotine is principally used for the control of thq grape-leaf hopper. 

 An average cf three fourths' of a pint of nicotine sulphate was added to 1#0 

 gallons of spray at a cost of §1»10. No nicotine v;as used on ginpes by the 

 growers interviewed in ilrlcamsas. Nicotine. was used in almost half the spray 

 material applied to the Girard vineyards. 



Time cf Spraying or Busting 



About 60 percent of the spraying in the New York and Pennsylvania vine* 

 yards v;as done in July, and abaut tv/ice as much in the first half as in the 

 last half of July, (table 68.) 



Table 68, - Number of vineyards for \7hich spraying or dusting was 

 reported during indicated week, 19^8 



Month 



Week of 

 month 



New York 



Pennsylvania 



Michis-an 



e>* 



Arkan sas 

 (1929) 



Marcli 



April 



May 



Juno 



July 



August 



September 

 Total 1/ 



3rd 



1st 



2nd 



3rd 



4th 



1st 



2nd 



3rd 



4th 



1st 



2nd 



3rd 



4th 



l3t. 



2n^ 



3rd 



4th 



1st 



2nd 



3rd 



4th 



Number 



2 



2 



9 



7 



10 



8 



20 



53 



14 



10 



5 



4 



1 



Number 



97 



8 

 5 



G 



25 



11 



14 



5 



7 



2 



2 



1 



.2 



49 



Nui^-ber 



1 



2 



2 



28 



36 



29 



19 



26 



18 



12 



5 



7 



4 



81- 



NuBfcer 



1 



6 



5 



2 

 25 

 27 

 23 

 26 

 17 

 25 

 23 

 10 

 14 



9 



6 



1 



72 



1/ Includes all vineyards for which the week and month of each application odP 

 spray or dust v/ere reported^ 



