STATE HOBTICULTUKAL SOCIETY. 63 



a turn of the nozzle will properly adjust it for that purpose. The 

 finer the spray the better the work, and less the liability to injure 

 the leaves. 



My attention was called to the danger of a too liberal appli- 

 cation by noticing several trees badly burned, and learning from the 

 operators that, as they were very fall of fruit, they turned the full force 

 of the coarse spray on them to make sure that every worm was killed. 

 We may, therefore, conclude that it requires considerable judgment 

 to decide just how much of the solution to apply to produce the best 

 results. 



I would advise those who use the Field Force Pump to further 

 reduce the strength of the mixture, as it is evident that the quantity 

 of spray from this pump, being larger and thrown with more force 

 than the smaller ones, should be of less strength. 



About the 20th of May, with Mr. C. N. Dennis, I visited the 

 large commercial orchard of Mr. Frank Cadwell, near Griggsville, 

 Pike county, and found him spraying for both codling moth and 

 canker worm. Last year his orchard was literally alive with canker 

 worms, and, as an experimennt, he sprayed a portion of it; where 

 the first spraying was done very few could be found this year, but 

 where done a few days later but little good was accomplished, the 

 insects having probably passed the leaf-eating period. 



We carefully examined a number of trees sprayed a few days 

 previous and found that the poison had done its work. I noticed 

 that the men having the work in charge had, as in my own orchard, 

 determined to do thorough work where the canker worms were very 

 numerous, and had taken pfE the spray nozzle and broke the stream 

 into a coarse'spray by placing their thumb on the nozzle. Mr. 

 Cadwell has since informed me that the leaves were badly scorched, 

 but as the insects were thoroughly destroyed he does not regret it. 



In Clay county, which is one of the principal apple-growing 

 regions of the State, considerable of this work has been done, and 

 Mr. Thos. Lowry, communicates a very singular instance of injury. 

 Last season he sprayed one side of a row of apple trees from the bot- 

 tom of a tank in which the poison had carelessly been allowed to 

 settle (he used Paris Green), the other side not being sprayed at 

 all. This season the side that was not sprayed was very full of 

 fruit, while the sprayed side bore none. 



Mr. Lowry advances no theory for this singular freak, nor can I 

 conceive of a reasonable one. The fruit buds were not formed at the 

 time the spraying was done, and could not, therefore, have been in- 

 jured, and as the foliage is healthy, it is scarcely possible th9,t the 

 leaf-buds were affected by the poison. This, of course, is an excep- 

 tional case, but shows the necessity of caution in making the appli- 

 cation. 



Mr. Lowry closes his interesting ^communication by saying that 



I 



