THE CODLING MOTH 



BULLETIN No. lo of the Ohio Agri- 

 cultural Experiment Station, which 

 has recently reached The Horticulturist, 

 gives some valuable information respecting 

 the codling moth. The following summary 

 contains the substance of what appears in 

 the bullciiii : 



1. Active, mature larvae of the codling 

 moth may be found in Ohio orchards from 

 June 30 to October 13, which signifies that 

 the fruit is more or less subject to attack 

 during the greater part of the growing sea- 

 son. 



2. An average of results from unsprayed 

 plots in three widely separated orchards 

 shows that had no spraying been done dur- 

 ing the past season 43 per cent, of the picked 

 apple crop would have shown injury from 

 codling moth at harvest. In addition, a 

 considerable quantity of fruit fell during the 

 summer, a large percentage of which was 

 wormy. The results from sprayed plots 

 averaged only nine per cent, wormy fruit. 

 In other words, 91 per cent, of the fruit 

 from sprayed plots was free from injury, 

 whereas, of that from unsprayed plots, only 

 57 per cent, could be so classed. 



3. The figures from each of three or- 

 chards indicate that a large number of 

 sprayings are unnecessary to control this 



insect. In some cases the very early spray- 

 ing and in others the very late apparently 

 did not accomplish much. x\s early spray- 

 ing with Bordeaux is necessary to control 

 the scab, and as the poison may <he applied 

 in it at a very small additional expense, it is 

 best to continue the established practice of 

 spraying as soon as the petals have fallen,- 

 using both the Bordeaux and poison. After 

 two or three sprayings of the combined mix- 

 ture the Bordeaux should be discontinued. 

 After this at least one and possibly two ap- 

 plications of the arsenate of lead should be 

 made at intervals of two weeks. 



4. Arsenate of lead is superior in killing 

 power to arsenite of soda, which is probably 

 due to its sticking qualities. 



5. Being appHed in Bordeaux mixture 

 does not reduce the effectiveness of arsenate 

 of lead. 



6. Damage from apple scab can be largely 

 avoided by two or three applications of Bor- 

 deaux mixture. 



7. Regardless of the care taken in its pre- 

 paration, Bordeaux mixture sometimes in- 

 jures foliage, especially when the application 

 is followed by wet weather. 



8. The keeping quality of apples attacked 

 by codling moth and apple scab is very seri- 

 ously impaired. 



Bandaging Trees 



PROF. H. L. HUTT, 0. A. C, GUELPH, ONT. 



At what season should apple trees be band- 

 aged ? What material is used and where can 

 it be obtained ?— (W. T. N., Zenda, Ont. 



I s'hall take up your questions in the order 

 given. First, June is the time to put bur- 

 lap 'bands on tue apple trees for the codling 

 moth. This should be done before the 

 middle of the month. 



Coarse sacKing or ordinary burlap is the 

 material best suited for this purpose. It 

 can be obtained at dry goods stores, where 

 it often comes as the outside covering on 

 goods sent from wholesale houses. 



Set More Trees. — Farmers should plant 

 more fruit trees, say up to five acres on a 

 lOO-acre farm. New markets are being 

 opened up in Europe, which, wdth our own 

 northwest, will create a demand for first- 

 class fruit, which will increase much faster 

 than the supply. — (Frank J. Barber, 

 Georgetown, Ont. 



The only spraying I have found necessary 

 so far has been for oyster shell bark louse, 

 which I have treated successfully, with a 

 thorough spraying of fresh slacked lime, in 

 March. — (G. H. Hutton, Easton's Corners, 

 Ont. 



