62 Report of State Board of Horticulture. 



The best time for this winter spraying is immediately after 

 the leaves drop in fall — even before they are all off — or just 

 before the buds open in spring. Personally, I prefer the latter, 

 but attention should be called to the danger of unfavorable 

 weather conditions at that time and to the consequent inadvis- 

 ability of delaying the work too long. 



All other sprayings are for special purposes and can best 

 be considered in connection with particular pests. 



Apple. 



apple scab. 



Spray with Bordeaux or with lime-sulphur (1-30) : first, 

 when the blossoms are beginning to unfold; second, spray 

 with lime-sulphur (1-32) immediately after the blossoms fall; 

 third, repeat 10 days or two weeks later. If prolonged rainy 

 weather follows the third spraying, a fourth two weeks later 

 may be profitable. 



CODLING MOTH. 



Add arsenate of lead or Paris green to the second scab 

 spray. Endeavor at this time, by the most thorough work, to 

 fill the blossom end of every apple with the spray. If this 

 be well done, and if the fruit be again thoroughly sprayed 

 late in June, fairly good results may be obtained without 

 further applications. It is our experience, however, that in 

 the Willamette Valley at least, it usually pays to spray once 

 or twice for the second brood. The first of these applica- 

 tions should be about August 1 ; the second some three or 

 four weeks later. While thorough work should be done at 

 all times particular emphasis should be placed upon the first 

 two sprayings. If all of the first brood larvse could be killed 

 there would be none of the second. 



SAN JOSE SCALE. 



Spray in winter with lime-sulphur, either immediately after 

 the leaves fall or before the buds start in spring. Do thorough 

 work. Soak every part of the tree. 



Aphids or Plant Lice. 



general recommendation. 



To destroy stem-mothers in the spring, spray just as the 

 buds are opening with lime-sulphur (1-10) plus black leaf-40 



