INSECTS AND INSECTICIDES. 19 



great deal of disappointment in the use of paris green gener- 

 ally occurs, on account of either poor material or unfavorable 

 weather conditions. The weather does not seem to have the 

 same effect on the arsenate of lead as it does on other sprays, 

 and storms do not seem to remove this poison, as it is not sus- 

 ceptible to the rain. 



Mixture No. 1. 



Arsenate of lead-- - 8 to 12 pounds. 



Water -- 1..- 200 gallons. 



Make the arsenate of lead into a smooth, thin paste by using 

 the necessary amount of water, tlien pour into the spray tank, 

 and keep well stirred while spraying. Use a fine spray with 

 plenty of pressure. 



Mixture No. 2. 



Paris green 1 pound. 



Unslaked lime ,6 pounds. 



Water --- 200 gallons. 



Make the paris green into a paste before placing it in the 

 spray tank. Slake the lime with plenty of water and strain 

 thoroughly so as to eliminate all particles which might clog up 

 the nozzle. Place the lime solution and paris green in the 

 tank with the water and stir the mixture constantly while 

 spraying. Lime water alone has been used, but it is preferable 

 to use the lime, as it shows when the trees have been sprayed 

 thoroughly. 



PEAR OR CHERRY SLUG {Eriocampa cemsi). 



When the pest first makes its appearance, especially on 

 young trees, a good dusting with air-slaked lime or, better, 

 hyd rated lime, will check the damage. Spraying with arsenate 

 of lead, as recommended for cankerworms, will be found very 

 efficient on larger trees. 



CABBAGE WORMS, CUCUMBER BEETLES, DIABROTICA, AND 

 FLEA BEETLES. 



The following are recommended: 



Wet Sprays. 



(1) Arsenate of lead 6 to 8 pounds. (2) Paris green 1 pound. 



Water 100 gallons. Unslaked lime.-- 2 pounds. 



Water 160-200 gallons. 



Dry Sprays. 



(1) Parisgreen 1 pound. (2) White arsenic 1 pound. 



Hydrated lime, air- Hydrated lime, air- 

 slaked lime, or wheat slaked lime, or wheat 

 flour 10 pounds. flour .- 12 pounds. 



