284 Report of the DErAUTMDNT of Entomology of the 



Weather diiriny tests in Table XVIII. — Spring treatment. Trees 

 fumigated June 6 to 8. Average temperature G3°, cloudy with 

 slight rain. Weather during the week following usually fair 

 with slight rain on one day. Average temperature 70°. 



Table XVIII. — Spring Fumigation of Infested Plum Trees. 



ORCHARD VII : I'LUMS. 



The 8G trees included in this experiment, and constituting 

 Orchard VII, form a portion of one of the large orchards jof 

 Western New York. It was set out about eight years ago and 

 has been under the best of cultivation. Two years ago two 

 trees near the middle of the orchard were discovered quite 

 seriously infested with the San Jos(S scale. From these trees it 



