17. 



Table 3. Number of pesticide treatments and dosage equivalents 

 of pesticide applied for insect and mite pest control in IPM 

 and Check blocks, 1980. 



IPM as 

 IPM partial % of 



Number of treatments IPM cooperators Check Check 



1.0 110 



8.8 74 



2.0 70 



0.5 20 



1.1 90 

 8.0 60 

 1.8 44 



Aphicide 0.01 0.3 0.4 3 



•7 



. , ^ Actual rate/100 gal water 



Dosage equivalent = -^ 1 — -^ r — ^ ? tl — „ 



^ ' Recommended rate m Southern 



New England Apple Pest Control 



Guide 



While there was a substantial reduction in spray application 

 trips, there was an even greater reduction in number of dosage 

 equivalents of insecticides, aphicides and miticides in IPM com- 

 pared with Check blocks (60, 3 and 44^o as much used, respectively). 

 (Table 3.) . 



Pesticide use 1977-80 



Figure 1 shows t7ends of pesticide use in IPM and Check blocks 

 in recent years. It is interesting to note in (Figure la and Figure 

 Ic) that a general reduction in pesticide dosage equivalents has 

 occurred. Although IPM orchards use substantially less pesticides. 

 Check orcliards also appear to be utilizing some IPM information as 

 well. In addition, the rapidly rising costs of pesticides (petro- 

 chemical derivatives) probably accounts for some portion of this 

 overall downward trend in spray material usage. As more sprays are 



