• THE MONTHLY BULLETIN. 223 



This spraying was doue just before the buds started to open, and at 

 the time of spraying both eggs and stem mothers could be found on the 

 ti-ees. It is thought that the lime sulphur spray will be eciually efficient 

 against either of these stages. As stated above, the w^ork last season 

 demonstrated fairly conclusively that the lime-sulphur spraying will 

 control the aphis. This season the work has shown, in my judgment, 

 that with an ordinary orchard power spray rig, with 3i or -1 horsepower 

 engine, it is entirely practical to spray walnut trees until they reach a 

 very large size; certainly young and medium size trees can be satis- 

 factorily sprayed with such a rig if the M.A.C. nozzles are used. We 

 hope to be able to give some rather definite data this season on com- 

 jjarative yield and quantity of nuts on the sprayed and unsprayed 

 orchards. When we have this data on hand we will know definitely 

 whether or not the process is a financial success. 



