No Spray: We never need to use any sprays on these crops
Organic Spray: These crops only get sprays approved for organic production
IPM, Advanced These crops sometimes require one chemical spray, but not necessarily.
(IPM stands for Integrated Pest Management)
IPM, Simple These crops get one chemical spray, but no others. e.g. carrots get an herbicide but organic methods are used rather than insecticides or fungicides.
Conventional: We don't grow any crops this way. "Conventional" implies that the crop is grown without any attempt to minimize pesticide use through organic methods.