ESTIMATING GAS FOR ORCHARD WORK 



8l 



On low, damp grounds where fogs are frequent, 

 and especially for apple and pear trees, infested with 

 either the San Jose scale or codlin moth, or old seedling 

 orange trees infested with red, brown, or purple scale, 

 the following table should be used: 



CHEMICALS FOR ORCHARDS ON DAMP GROUNDS OR WHERE 

 FREQUENT FOGS OCCUR 



In the tables given above the diameter is taken 

 through the foliage. The water and acid are estimated 

 in fluid ounces. 



In Eastern orchards the amount of cyanide is some- 

 what greater than that used in California. Experience 

 has shown that 0.20 gramme of cyanide per cubic foot 

 of space enclosed gives most satisfactory results upon 

 scale-infested deciduous trees in the Hast. 



In the preparation of the following table calcula- 

 tions are based on the hight and diameter of the tented 

 tree. First, the cubic contents of a cylinder was cal- 

 culated, the hight and diameter of which was the 

 hight and diameter of the tree, then the contents of a 

 sphere w r hose diameter was the hight of the tree was 



