Ill 



least as far as the control of San Jose scale antl various 

 other pests are concerned. As stated, I do not think there is 

 very much economy in making your own preparations. 



A ]MEMBP]R: Oft times, in the spring of the year, 

 ijpraying is delayed on account of weather conditions. If 

 that spraying was delayed until the leaves showed green, 

 would you use the dormant spray as late as the time when 

 the leaves shoAV green? 



PROF. PARROTT : If the San Jose scale is in your or- 

 chard, and rather than omit the treatment, I would spray 

 with lime-sulphur solution winter strength, taking the 

 chance of slight burning of the foliage. Leaves can stand 

 cunsiderable burning without any ill effects on the crop. 

 1 know growers in New York who spray lime-sulphur solu- 

 tion at ^^,'inter strength when you can see the pink in the 

 Ilossoms and there is sometimes some burning of the leaves, 

 hut when the leaves are fully expanded the little burned 

 area of the unfolded leaf is very small as compared with the 

 whole leaf area. 



A ^MEMBER: What time would you spray for the apple 

 . tcab and is more than one application necessary? 



PROF. PARROTT: Yes, more than one application is 

 necessary. In New York there is an increasing tendency 

 TO make more applications for apple scab and the principal 

 treatments are just before blossoming and after blossoming. 

 If w(e have a period of low temperature and considerable 

 precipitation for the third or fourth week after the dropping 

 of the petals, cpiite a number of our growers slip in an extra 

 spraying at that time. 



A ]ME]\IBER : Can you tell me what causes the so- 

 called water core in April, not exactly water core, but it 

 extends from the skin to the core and is more prevalent in 

 the King apple? 



PROF. PARROTT: I cannot answer that question. It 

 is a physiological disease and I do not think the nature of 

 the trouble is well understood. Apparently we know no- 

 method of preventing the trouble. 



