No. 6. DEPARTMENT OF AGRICULTURE. 1021 



It should be remarked that lusect Powder is only of value when 

 fresh and of full strength. Unfortunately it is difiicult to obtain it 

 fresh, and much of it is so adulterated as to be practically worth- 

 less. 



LIME. 



Lime is often of much value as an insecticide, either as white- 

 wash, sometimes with enough Paris greed added, to give it a slight 

 greenish tinge, or as quick lime to be dusted onto the insects. 

 When used in the preparation of Paris green it is added to combine 

 with the free arsenic present, which would burn the leaves, if left 

 uucombined. 



NORMAL OR 1.6 PER CENT. BORDEAUX MIXTURE. 



Copper suli:>hate (blue vitriol), 6 pounds. 



Quick lime (good stone lime), 4 pounds. 



Water, 50 gallons. 



Dissolve the copper sulphate by putting it in a bag of coarse 

 clothing and hanging tins in a vessel containing 4 to 6 gallons of 

 water. Use an earthen or wooden vessel. After the copper sul- 

 phate is dissolved, dilute with water to 25 gallons. Slake the lime 

 and add 25 gallons of water. Mix the two and keep thoroughly 

 stirred while using. If the mixture is to be used on peach foliage, 

 it is advisable to add two i)Ounds more of lime to the above formula. 



BORDEAUX MIXTURE AND PARIS GREEN. 



Mix 4 ounces of Paris green as j)rei)ared above, with 50 gallons 

 of normal Bordeaux mixture. 



AMMONIACAL COPPER CARBONATE. 



Cojiper carbonate, 4 ounces. 



Ammonia, 3 pints. 



Water, 45 gallons. 



Make a paste of the copper carbonate with a little of the water. 

 Dilute the ammonia with 7 or 8 times its bulk of water. Add the 

 I)aste to the diluted ammonia and stir until dissolved. Add enough 

 \^ater to make up to the 45 gallons. Let it settle and use the clear 

 blue liquid only. Do not make this up long before using as it loses 

 its strength on standing. It is used when the fruit is so nearly ripe 

 that Bordeaux mixture would produce stains if it were used. 



