REPORT OF THE STATE ENTOMOLOGIST 1901 769 
good proportion of the trees in this lot are practically free from 
San José scale. 
Titusville oil, 25% 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 bosc 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. 3 3 
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 
José 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 
trees was also very rough. Of the other 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 
