Table 1 , continued. 



For TPB in a wholesale operation and EAS: 



$2.17 + $1.75 + $8.55 



B(wholesale-TPB) - B(EAS) = 



(500bu)(80%/100)[$15-($2)(100%/100)] 



= 0.0024 = 0.24 % 



II. Some damage will occur regardless of treatment. For TPB 0.05 % should be added 

 to B, and for EAS 0.1 % should be added to B. 



T= B + A 



where: 



T = Total % injury 



A = % injury even with a well-timed insecticide treatment 



With the assumptions used in this article: 



T(retail-TPB) = 0.4% + 0.05% = 0.45% 



T(wholesale-TPB) = 0.24% + 0.05% = 0.29% 



T(EAS) = 0.24% + 0.1% - 0.34% 



III. A portion of the total TPB injury is not downgraded. Data suggest that only 10 % of 

 the TPB injury actually is downgraded; whereas 100 % of the EAS injury is down 

 graded. 



EIL = T/(D/100) 



where: 



EIL = Economic injury level 



D = % of injury actually downgraded 



10 Fruit Notes, Spring, 1989 



