52 STATE HORTICULTURAL SOCIETY. 



A Member — If you will use wliale oil sonp with this, it acts as a 

 carrier and makes it much more efficient. 



CODLING MOTH. 



There have been a great many complaints from apple growers that 

 arsenate of lead fails to control the fall brood of Codling Moth. I 

 cannot entirely understand the difliculty but I am of the opinion Ihal 

 it is not because the spray material is not good but because its effec- 

 tiveness after a})plication does not cover as long a period as the egg 

 hatching. It has been observed that female moth development is very 

 irregular and covers, in most seasons, four or five or more weeks and 

 as each female moth lays eggs five or more weeks, it follows that egg 

 hatching may continue for at least five or six weeks. Inasmuch as 

 ai'senate of lead is believed to be effective not more than four weeks, 

 it can readily be understood how some worms might escape even a very 

 thorough job of spraying. This being true, it is possible some apple 

 growers would secure better results with their fall and winter varieties 

 if they sprayed twice in the summer about the middle of Ju]y and again 

 darly in August. Exceptionally good results of a number of Michigan 

 applemen lends emphasis to this suggestion. In rainy seasons this 

 extra spraying would add much to the prevention of apple scab and 

 other fungous diseases. 



THOROUGHNESS IN SPRAYING. 



A moment ago, T spoke of the poor crops that some secure due to 

 lack of thoroughness in spraying and I want to say a word or two 

 more about that. Do you know I have made up my mind that com- 

 ]>aratively few IMichigan growers know what thorough spray means? 

 One might almost allow himself to believe that many do not know what 

 thoroughness in anything means. All the members of this State Horti- 

 cultural Society do, of course, it is the other fellows I am talking about. 

 They spray carelessly and only cover half or two-thirds of the leaves 

 and fruit or they spray too late or omit a critical spray. So often I find 

 inadequate or poorly kept spraying equipment. Some spend a quarter 

 or third of their time loading up their sprayer. An inadequate or ex- 

 tremely inconvenient water supply is usually the cause. Sprayei's are 

 not thoroughly cleaned out at the close of each spraying or at the 

 close of the season. For instance, it happened I was dong some experi- 

 mental work on one of the good fruit fanns in our State last summer. 

 On the occasion of one visit, I had to spend two whole days cleaning out 

 and getting in repair, a sprayer that has been neglected at the last 

 spraying. Think of it, two whole days of the finest days for spraying 

 one ever saw and hardly a tree sprayed. I want to urge you who are 

 here today, to examine your equipment and see if just a little labor and 

 money expended to remedy such conditions, would not be an exceedingly 

 good investment. In case you have a power outfit and cannot average 

 1,000 to 1,200 gallons a day, there is need of improvement somewhere. 



We have only a few days to do some of the spraying in and if the 

 spraying equipment is convenient, in good condition and of sufficient 

 capacity, you are much more sure of getting them done in time. The 



