REPORT OP THE STATE ENTOMOLOGIST 1901 765 



trees appear to have been in a very good condition, except where 

 dead twigs are recorded in the following notes, and this is more 

 likely due to injury by the San Jose' scale or winterkilling from 

 some other cause, than from the application of insecticides, 

 either this or the previous year; since it is about as common 

 •on trees treated with whale oil soap as on those sprayed with 

 crude petroleum. 



Standard oil, 20$ mechanical emulsion. 11 trees were treated 

 with this combination. Thev are as follows: tree 115 a Bartlett 

 and trees 24, 110 and 111, Kieffer pear; tree 25, a beurre bosc; 

 trees 70 and 71, respectively Clapp's favorite and beurre d'Anjou 

 pears; trees 43, 44, 88 and 89, old Mixon peach. The condition of 

 these trees was as follows toward the close of the growing sea- 

 son, Sep. 7, 1900. There were very few or no young scale insects 

 on trees 24 and 115; no living young were found at that time on 

 tree 111, very few on tree 110, but few on trees 25, 43 and 44; 

 living young were very abundant on trees 70, 71 and 88, specially 

 on tree 71, and they were extremely abundant on tree 89. 



The first observations, made after the spraying of Ap. 11, were 

 •on May 22, when only those trees presenting something out of 

 the ordinary received special attention, Tree 71 had then only 

 one vigorous shoot, and tree 88 had been cut down to a five foot 

 stump, from which a few buds were breaking forth. 



July 3, a date which was late enough to permit a fair judgment 

 of the numbers of living scale insects, through the abundance of 

 the young, the conditions were as follows. There were few or 

 mo young on trees 24, 25, 43, 88, 110, 111 and 115; young were 

 rather few on tree 44 and few on trees 70, 71 and 89. The fol- 

 lowing additional notes were made at this time regarding the 

 condition of certain of the trees. The new shoots on tree 25 were 

 vigorous, and the cluster of shoots on tree 88 were short and 

 vigorous. The bark of tree 70 was very rough. 



Aug. 9 very few or no young scale insects were to be found on 

 any of tliese trees. The shoots on tree 88 were growing very 

 tfast. 



