The prime objective of the last irrigation is to ensure that boll maturity is completed.
At this time of year, it will take about 45-55 days from last effective flower (cut-out) to
maturity, longer in shorter season areas. Given reduced daily water use late in growth
and a full profile, the crop should be able to rely on stored soil water for the last 25-30
days, on most clay soils. Hence irrigation water is required for the first 20-25 days after
last effective flower – possibly two irrigations would be required during this time.
To read CSD’s Last irrigation & defoliation date flyer click here
