those persons possessing these qualifications should be allowed to 

 use the pumps. 



insecticidp:s. 



While there are many new insecticides offered, there is so little 

 exact knowledge of their effect upon farm and garden crops that 

 until further trial is made we can only recommend for general use 

 Paris green, arsenate of lead and hellebore for chewing insects and 

 keroseiie and water and kerosene emnlsion for sucking ineects, with 

 pyrethrum or insect powder in a very few cases. 



PARIS GREEN. 



This insecticide needs no description. Special care however 

 should be taken that only pure Paris green be used. A much larger 

 per cent of this may be used without injury to the foliage if mixed 

 with the Bordeaux than if applied in water alone. The cherry, 

 peach and Japanese plum cannot be sprayed with Paris green with- 

 out injury to the foliage. 



ARSENATE OF LEAD. 



Formula. 11 oz. Acetate of Lead. 

 4 oz. Arsenate of Lead. 

 150 gallons water. 



This insecticide has th's advantage over Paris green that when 

 used in large quantities it will not injure the foliage of the peach, 

 cherry, Japanese plum or other trees of delicate nature. It is how- 

 ever more expensive and its effectiveness in destroying the common 

 insects attacking our fruit and garden crops is not so well proven as 

 that of Paris green. It should be given a thorough trial especially 

 on those crops where Paris green is known to be injurious. 



"*This insecticide is easily prepared by putting 11 oz. acetate of 

 lead in 4 qts. of water in a wooden pail and 4 oz. arsenate of 

 lead (50 per cent strength) in 2 qts. of w^ater in another wooden 

 pail and when entirely dissolved mixing in a hogshead or tank con- 



*Prof. C. H. Fernald in 45tb Annual Report of Mass. State Board of Agricul- 

 ture, 1S97. 



