Guthion 



Habitat Bordering Orchard 

 Guthion Avaunt 



Avaunt 



Figure 1. Schematic illustration of pattern of spray application in four experimental plots of a commercial orchard. 

 Plot treatments differed in location within each orchard block. 

 = Trees sprayed by hired applicator. 



0.5 

 I 0.4 

 i 0.3 

 5 0.2 

 ^ 0.1 



1.5 



li- 05 



PLUM CURCULIO 



im 



GU 

 ALL 



GU 

 PER 



AV 

 ALL 



AV 

 PER 



SUMMER LEAFROLLERS 



GU 

 ALL 



GU 

 PB% 



AV 

 ALL 



AV 

 PER 



K 0.4 



i 0.3 



H 



5 02 



III. I 



APPLE MAGGOT 





GU 

 PB? 



AV AV 



ALL PB? 



INTERNAL LEPIDOPTERA 



GU 

 PER 



AV 

 ALL 



AV 

 PB? 



Figure 2. Two-year average (2001 and 2002) of data on effectiveness of Guthion (GU) versus Avaunt 

 (AV) against pest insects when applied to all rows (ALL) versus the two perimeter rows (PER) of 

 seven-row plots in commercial orchards in Massachusetts. Values represent data averaged across all 

 samples taken each year in rows 1, 3, 5 and 7 of plots. 



Fruit Notes, Volume 68, Winter, 2003 



