|% of Sicot 71B||Staple
|Year||2006||Trial Type||N/A||Trial Design||RCB x 3 Reps||Balance of Field||Pigeon Peas|
|Planted||28/09/05||Picked||27/03/06||Previous Crop||Cotton||Established Method||Pre-Irrigated|
|Plant Stand/m||9.0||Rainfall (defoliation mm)||158||Incrop irrigations||10||Soil applied insecticide||No|
|Nitrogen (kg/ha N)||212||Phosphorus (kg/ha P)||20||Potassium (kg/ha K)||0.0||Zinc (kg/ha Z)||2.5|
|Heliothis sprays||1||Insect sprays||3||Pix applied (L/ha)||1.3||Days to defoliation||159|
Trial was planted into pre-irrigation moisture in late September. Rainfall during October ensured an evenly moist seedbed and brought up some remaining dry seeds. A good stand was achieved with some minor gaps associated with cotton stubble. After 73mm of rain for the month of October, the crop received virtually no useful in-crop rain for the remainder of the season, and as a result, no tail water was pumped from this field for the season.
As well as very little in-crop rain, the crop endured 87 days with temperatures exceeding 36ï¾°C, more than half the growing season. This is more than 50% above the long term average.
Pre-plant fertilizer consisted of 194 kg/ha N applied as urea, and P and Zn delivered via Starter Z (100 kg/ha). There were two water-run applications of urea (40 kg/ha in mid November and December) applied to the top third of the field to combat a historical problem of senescence on the head ditch end.
The weed management program included Cotogard (3.0 l/ha) and Stomp (2.2 l/ha) applied with the planter (40% band) and also as a layby (75% band) in late November.
The crop required two insecticide applications for mirids (Regent) in mid November and mid December and a pyrethroid/ Abamectin targeting Helicoverpa and mites in mid January.
Pix was applied to the bottom (tail drain) third of the field (1.3 l/ha), evenly across the trial.
The field was defoliated by ground-rig on 6th March (100 ml/ha Dropp + 0.5 l/ha Prep), followed by a second hit of Dropp (50ml/ha) and Prep (2.0 l/ha) six days later.