REPORT OF THE STATE ENTOMOLOGIST 1902 139 



not treated. The latter were in some cases very badh' infested, 

 liavin": entire limbs nearly iucrusted with thrifty scale insects. 



Lime, salt and sulfur mixture. This compound was applied to 

 about 50 trees in the eastern end of our experimental orchard; 

 and the results obtained from this test differ somewhat from 

 those in other parts of the State under somewhat different 

 conditions. The following formula was used : 10 pounds of lime 

 and 20 pounds of sulfur were thoroughly boiled in 20 gallons of 

 water for one and one half hours, or till the sulfur was dissolved, 

 which was indicated by the solution assuming an amber color. 

 This mixture was stirred frequently during the boiling, and 

 then 30 pounds of lime, which had previously been thoroughly 

 slaked by pouring hot water over it, and in which 1.5 pounds of 

 salt had been dissolved by stirring, was added to the boiling 

 lime and sulfur mixture. The whole of this mixture was cooked 

 half an hour, being thoroughly stirred from time to time, and 

 then enough water was added to make 60 gallons. The mixture 

 was thoroughly strained through gunny sacks and sprayed as 

 soon as possible, so as to apph' it when hot. The mixture used 

 in the experiments under consideration was boiled very thor- 

 oughly, and there can be no question as to its having been 

 properly prepared. 



Trees 4-11, 29-33, 49-59, 75-78 and 92-100 were treated with 

 this preparation, as well as 20 to 25 large plumtrees in an old 

 orchard just north of the experimental plot. The work was 

 completed about 5 o'clock in the afternoon, and no rain was 

 observed to fall till about 10 o'clock of the following day. There 

 was however very little drying of the spray, since the atmos- 

 ])here was humid most of the time. The exact record of precipi- 

 tation is given above under the 20^ mechanical emulsion, p. 132. 



An examination of these trees Ap. 11 showed that, while they 

 were apparently well covered with the mixture, in reality the 

 rain had washed the finer portions against the rougher projec- 

 tions on the bark and had also caused it to gather in masses on 

 the smooth bark of the limbs. It is very probable that much 

 of the more soluble material had been carried away, or deposited 

 in spots here and there on the tree, much to the detriment of 

 the application. 



