Identifying panicle initiation in rice
Panicle initiation (PI) is a growth stage that represents the start of the reproductive phase in rice development. It is when the actual panicle (terminal flowering head) begins to form in the base of the stem.
Panicle initiation is the second best time to apply nitrogen to a rice crop with pre-permanent water being the most efficient.
This factsheet provides information on importance, identification and timing of PI and when to topdress.
Tina Dunn and Brian Dunn, NSW Department of Primary Industries, Primefact 1278, third edition, June 2018
Alternatively, watch how you how to identify P.I. on this video.