Things conventional farming (IPM) has learned from organic farming:
> Preventive, cultural, and physical methods, must be the first choice for pest and disease control.

Things organic farming has learned from conventional farming:
> All pesticides must be used according to their label, otherwise it may result in an illegal residue on the food crop.


WHAT ARE THE RULES FOR USE OF ORGANIC MATERIALS?

Organic growers must use products that meet the requirements of USDA’s
National Organic Program (NOP) as established at 7CFR Part 205.
Ingredients found in farm input products for crop or livestock
production must either be a natural substance, or a synthetic
substance that is included on the National List (included in the
regulations at 7CFR 205.600 - 205.607). A few natural substances are
also specifically prohibited. Inert ingredients used in pesticides
(ingredients other than pesticides) must be considered by the U.S. EPA
to be inerts of minimal risk (EPA List 4A or 4B).

Materials used for disease and insect control are also subject to
further restriction by NOP rules which require that preventive,
cultural, and physical methods, including introduction of beneficial
insects must be the first choice for pest and disease control. If
those methods are not effective, a botanical, biological or synthetic
substance on the National List may be used, if the conditions for this
use are documented in the organic farm plan. This requirement reflects
an historic organic practice that relies primarily on the use of
biological and cultural practices such as crop rotation;
diversification; habitat management; beneficial organism releases;
sanitation; and timing before resorting to a limited use of permitted
pest control substances.

Finally, all pesticides must be used according to their label as
required by EPA and state regulations. Label instructions include
directions for use and rate of application as well as permitted crops
and designated target species. It is important to use products only on
labeled crops, because otherwise use of the product may result in an
illegal residue on the food crop.

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http://www.nysaes.cornell.edu/pp/resourceguide/index.php

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