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a. Insecticide Usage 

 IPM ■ — ■ 

 CHECKd- 



-D 



-- ^ of Blocks ( ) 



84- 



/9)S 4 



b. Insect Injury to 

 Fruit at Harvest 



2.. 



d. Mean Abundance 

 of Spider Mites 

 at Peak Populatio 



Trends in pesticide use, injury to fruit, and spider mite 

 populations. 1977-1979. 



