> 

 X 



a 



(/5 



■a 



.4^ 



s 



« 



C 



u 



100 



80 



60 



40 



20 H 







-20 - 

 -40 - 

 -60 

 -80 



Perimeter-rows captan treatment 



r^=0.10 



95% Confidence Interval 







10 



20 



30 



40 



50 



— I — 

 60 



70 



Distance to Principal Border (m) 



Figure 4. Percentage of apples infected with flyspeck at harvest versus the distance to princi- 

 pal border (parallel to the block): Harvard, Berlin, Warren, North Brookfield, perimeter-rows 

 captan treatment, 2001 . 



FS was discovered in row 1 at the Harvard site on 

 July 16, in both the Flint (9%) and captan (13%) pe- 

 rimeter-rows spray treatments. At the Berlin site, FS 

 was found initially on August 27, in rows 3, 5, and 7, 

 of all but the seven-row Flint treatment. FS was first 

 discovered at the Warren site on August 29, in row 5 

 of the perimeter-row captan treatment. At the North 

 Brookfield site, FS was found on August 15, in both 

 the perimeter-rows Flint and captan treatments. The 

 Shelbume site first had apples infected with FS on 

 August 16, in the unsprayed rows of the perimeter- 

 row spray treatments of Flint and captan. FS was not 

 found at the Hawley site, despite counts continuing 

 into early October. It was not surprising, given the 

 absence of FS on alternate host plants within the sur- 

 rounding border in June. 



When harvest counts (September 6 to 13) from all 

 treatments and all rows of all sites were compared (Fig- 



ure 5, upper graph), Flint treatments had as little or 

 less FS than captan treatments in rows 1 , 3, and 7. The 

 perimeter-rows Flint count (6% infected fruit) was 

 slightly higher than the perimeter-rows captan treat- 

 ment (5%), but overall, Flint compared favorably to 

 captan. The lowest average FS incidence was found 

 in the seven-row Flint treatment. The perimeter-row 

 captan treatment had the most FS, with 17% of fruit 

 infected in row one. This high average number was 

 greatly intluencedby the 100%) incidence in this treat- 

 ment and row at the Harvard site. When the Harvard 

 data were omitted (Figure 5, lower graph), FS inci- 

 dence in this row and treatment was reduced to \%. 

 Row 5 of the perimeter-row Flint treatment had the 

 next highest FS incidence, with ?%> of fruit infected. 

 With Harvard omitted, FS incidence in row 5 of all 

 treatments was greater or equal to the FS incidence in 

 rows 3 and 7 of the respective treatment. 



Fruit Notes, Volume 67, Spring, 2002 



