cereal staging - Bayer CropScience

Zadoks Staging KeyStage 0: Germination• Secondary stages (i.e. imbibition, radicalemergence) are susceptible to herbicideresidues, soil borne diseases and insect feeding.Stage 1: Main stem leaf production• A new leaf is counted as fully emerged when50% of the leaf blade has unfolded.• Leaves are counted on the main stem of the plant.• Earliest stage by which many herbicides canbe applied.• Early disease scouting should be done at this stage.• Stage at which you may see effects fromunderground feeding of grubs.• Monitor for cereal aphids during this stage.• For spring cereals, fertilizer should be appliedby stage 14.Z 09 Leaf just at coleoptile tip Z 10 First leaf through coleoptile