Pesticide residues may not be that important for everyone; however, women who are trying to become pregnant may want to be careful when choosing fresh fruits and vegetables. Also, some recent reports have found that pesticides may also adversely affect the brains of growing fetuses and young children.
You may want to choose organic versions of some of the most contaminated. Organic produce may still contain some pesticide residues but would certainly be better choices under these circumstances. In these cases, you may want to consult the list of the “dirty dozen” put out by the Environmental Working Group.