-13- 



as to whether or not to spray were made on the basis of trap captures 

 and visual observations o£ pest and predator insects. Decisions on 

 all insecticide and aphicide applications were made in the orchard. 

 Leaf samples for mites were brought back to the lab and processed. 

 A decision on whether or not to spray for mites was made within 24 

 hours . 



RESULTS 



A summary of our 1978 results is given 

 Average numbers of tarnished plant bug (TPB) 

 (EAS) , apple maggot fly (AMP) , codling moth 

 roller (RBLR) and obliquebanded leafroller 

 in the 8 IPM orchards than in the 8 check or 

 these higher numbers, fruit injury levels at 

 infesting insects) averaged 44% lower in the 

 of 2.6% injury) than in the 8 check orchards 

 injury). At the same time, the 8 IPM orchar 

 insecticide sprays aimed at these pests. We 

 in injury to better timing and avoidance of 

 cations. In addition, the 8 IPM orchards av 

 than in the previous 2 years. 



in Table 1 (see below) . 

 , European apple sawfly 

 (CM) , redbanded leaf - 

 (OBLR) adults were higher 

 chards. But, in spite of 



harvest (for all fruit- 



8 IPM orchards (an average 



(an average of 4.81 

 ds averaged 311 fewer 



attribute this decrease 

 unnecessary spray sppli- 

 eraged 27% fewer sprays 



TABLE 1. Summary of Overall Results - IPM and Check Orchards 



TPB 



y 



Average Number/Trap 



EAS 



X 



AMP 



,w 



CM 



,v 



RBLR 



u 



OBLR 



Average 



Fruit 



Injury 



Average No. 

 Insecticide 

 Sprays 



1978 1976,1977 



8 IPM 

 Orchards 



8 Check 

 Orchards 



6.0 5.3 8.5 122.6 166.0 5.5 

 4.5 4.3 5.7 89.9 98.5 4.5 



2.6% 6.7 

 4.8% 9.6 



9.3 



Difference +33% +23% +47% 



+36% +18% +22% 



■44% 



-31% 



Does not include materials directed solely at aphids (e.g., endosulfan, phosphamidon) 

 ^ TPB = Tarnished Plant Bug 



X 



w 



u 



EAS = European Apple Sawfly 

 AMF = Apple Maggot Fly 

 CM = Codling Moth 



RBLR = Redbanded Leafroller 



OBLR = Obliquebanded Leafroller 



