Together, these results show that residues of commercially- 

 formulated wettable powder applications at orchard rates of 

 phosmet, azinphosmethyl , captan, and Dikar have substantial repell- 

 ent effects on A. fallacis females. This could have negative 

 implications for integrated pest management programs involving 

 biological control of spider mites by A. fallacis . For example, 

 summer application of any of these four materials at a time after 

 A. fallacis has entered the trees could affect the food supply 

 available to A. fallacis by rendering spider mite eggs less pala- 

 table, thus reducing the rate of increase in the A. fallacis popu- 

 lation. In addition, pesticide repellency could Torce A. fallacis 

 into less well sprayed parts of the tree or out of the tree al- 

 together, thereby allov>?ing more rapid buildup of pesticide resistant 

 spider mites in the well sprayed parts. Further research under 

 field conditions is needed to determine the true impact of pesti- 

 cide repellency on A. fallacis . 



Table 1. Influence of pesticide residues on prey egg consumption, oviposition, 

 and location of Amblyseius fallacis on bean leaf discs. 



