LiEi'ORT OF THE STATE ENTOMOLOGIST 1902 13T 



An examination July 8 showed that the trees near the northern 

 end of the old orchard have very little or no scale, except in one 

 instance. In this case the tree was very badly infested, the 

 bark was quite rough, and the living young were very abundant. 

 Quite a number of the treated trees bore considerable fruit. 

 The trees in the young orchard showed very little or no injury 

 except in a very few cases where possibly an excessive amount of 

 oil was applied. A very few living scales were found on some of 

 the trees and none on many. 



An examination Nov. 24 did not give satisfactory results in 

 the old orchard, since some of the trees were comparatively 

 free from' living insects, while others were rather abundantly 

 infested. The latter, however, were trees with very rough bark, 

 which probably had considerable to do with the insects escaping 

 destruction. The condition of the trees in the young orchard 

 on the hill was much more satisfactory, and there were very few 

 scale insects to be found on those sprayed with the oil. The 

 trees did not show the slightest injury, except in one or two in- 

 stances, and this may have been due to other causes, since they 

 had made an excellent growth during the summer and had de- 

 veloped numerous fruit buds. 



Summer spraying. The application of even a mechanical crude 

 petroleum emulsion to trees in full foliage has not been recom- 

 mended in the past, and the writer does not feel justified in doing 

 so at present, in spite of the fact that his attention was called last 

 summer to a very badly infested peach orchard in the southern 

 part of the State, which had been sprayed while in full leaf with 

 20$ and 25$ mechanical crude petroleum emulsion. The applica- 

 tions were made at this time because it had just been discovered 

 that the orchard in question was very badly infested with the 

 San Jose' scale, and it was felt that even heroic measures should 

 be resorted to in order to check the pest. The spraying was done 

 July 7, and the following day many of the trees were literally 

 dripping with the oil, and the same was true of the weeds under- 

 neath, though we failed to note any injury. This work was done 

 on the recommendation of Mr P. L. Huested, San Jose' scale 

 inspector of the State Department of Agriculture, and this gen- 

 tleman reports that, so far as he has been able to discover, the 

 trees have not suffered from this treatment, except that con- 



