REPORT OF THE STATE ENTOMOLOGIST 1901 769 



good proportion of the trees in this lot are practically free from 

 San Jose' scale. 



TitusviUe oil, 25 f c mechanical emulsion. There were 10 trees 

 treated with this mixture. They are as follows: trees 22, 23 

 and 69, Howell; tree 68, a Vermont beauty; tree 108, a Bartlett; 

 tree 109, a beurre boso pear; trees 41 and 86, Crawford; and 

 trees 42 and 87, old Mixon peach. Their condition near the end 

 of the growing season, Sep. 7, 1900, was as follows. There 

 were very few or no young scale insects on tree 86; few on 

 trees 42 and 109; they were rather abundant on trees 41 and 87; 

 abundant on trees 22, 23, 69 and 108, and exceedingly abundant 

 on tree 68. 



May 22, there were only a few upper limbs living on trees 

 86 and 87. 



July 3, there were very few or no young scale insects on trees 

 41, 42, 86, 87 and 109; there were few on trees 22 and 69; they 

 were rather abundant on tree 23, and abundant on trees 68 and 

 108. 



Aug. 9, there were very few or no young on trees 41, 42, 87 

 and 109; and they were rather abundant on trees 23, 68, 69 and 



108. Tree 86 was dead. 



Sep. 25, there were very few or no young on trees 69, 87 and 



109, few on trees 41 and 42, rather few on trees 23 and 108; and 

 they were rather abundant on trees 22 and 68. Tree 87 was 

 then a mere stump. 



A study of the above record in connection with the diagram 

 of the orchard shows that, of the six trees on which living San 

 Jose' scales were found Sep. 25, three were on the extreme 

 edges of the orchard and therefore very liable to ^become 

 reinfested during the season. In addition, it should be noted 

 that two of these three trees, nos. 22 and 23, were very badly 

 infested in the spring of 1900, and in the fall of that year 

 living scale insects were abundant on them. The bark on these 5 

 trees was also very rough. Of the n ^her three, there were only 

 a few living scales on trees 41 and 42, and the remaining interior 

 tree, no. 68, which has a very rough bark, was very badly 



