14- 



Fungicide usage and the incidence of fruit diseases at 

 harvest in the IPM orchards are summarized in Table 2, and 

 similar information for control orchards is found in Table 3. 

 The IPM orchards averaged 2 less fungicide sprays than the 

 non-IPM orchards, and received about 3 less dosage equivalents. 

 In contrast, a slightly higher percentage of diseased fruits were 

 harvested from the IPM orchards (Table 2) than from the control 

 orchards (Table 3) . Neverthless, $7.79 per acre was saved in the 

 IPM orchards , because the savings from reduced fungicide usage 

 more than offset the higher loss due to downgrading of fruit 

 because of diseases (Table 4) . 



Table 2. Cost benefit analysis of fungicide usage and fruit quality 

 for IPM orchards in 1981. 



Orchard Number IPM orchards 



of I diseased Fungicide $ loss to 



fungicide Dosage fruits at cost per disease 

 sprays Equiv. harvest acre per acre 



1 14 8.83 0.1-Scab 100.14 18.26 



0.3-Other 



2 11 10.43 0.5-Scab 125.57 31.95 



0. 2-Other 



3 11 11.68 0.1-End rot 93.61 4.65 



4 8 8.27 0.2-Scab 132.05 31.95 



0.5-Other 



5 11 9.36 0.5-Scab 97.17 73.04 



1.1-Other 



6 11 7.95 0.5-End rot Pt 92.37 22.82 



Black rot di 

 Bitter rot 



7 13 10.53 0.1-Scab 93.73 50.21 



1.0-Other 



8 9 7.96 0.2-Scab 123.88 9.13 



9 11 10.62 0.1-Scab 101.31 31.95 



0.6-Other 



10 12 9.88 0.1-Scab 96.10 54.78 



1.1-Other 



11 10 10.48 0.1-Scab 117.96 59.34 



1.2-Other 



Averages 11 9.63 0.17-Scab 106.72 35.28 



Q.60-Other 

 0. 77-Total 



z 



n „„ • 1 ^ amount of fungicide applied 

 Dosage equivalent = ^ ^ ■■ ■■ ^v^ r^ 



average recommended rate for that funpicide 



