Grower: Donald & Douglas Crothers

Variety Yield
% of Sicot 71B Staple
Manual Class Micronaire Strength
DP 408BGII 9.08 3.68 110.5 1.15 37 21-2 5.3 31.3 37.3 81.3
Sicot 71B 8.22 3.33 100.0 1.17 37 21-3 4.9 31.7 39.2 82.5
Sicot 289B 7.90 3.20 96.1 1.16 37 21-2 5.2 32.1 37.3 81.9
Sicot 80B 7.90 3.20 96.1 1.16 37 21-3 5.2 31.5 37.3 82.8
Sicala 350B 6.38 2.58 77.7 1.23 39 21-3 4.8 34.0 35.6 83.4
Year2006 Trial TypeN/A Trial DesignRCB x 3 Reps Balance of FieldPigeon Peas
Planted28/09/05 Picked27/03/06 Previous CropCotton Established MethodPre-Irrigated
Plant Stand/m9.0 Rainfall (defoliation mm)158 Incrop irrigations10 Soil applied insecticideNo
Nitrogen (kg/ha N)212 Phosphorus (kg/ha P)20 Potassium (kg/ha K)0.0 Zinc (kg/ha Z)2.5
Heliothis sprays1 Insect sprays3 Pix applied (L/ha)1.3 Days to defoliation159

A very impressive result for Sicot 71B in an extremely hot season from a yield and fibre quality perspective. In a situation where micronaire was high across all varieties, it and Sicala 350B were the only ones to make base. This performance shows Sicot 71B to be a top choice Bollgard IIï¾® for the Balonne next season. In consecutive seasons, Sicot 80B and Sicot 289B have produced almost identical yield and fibre quality results at this location. Both are excellent companion varieties to Sicot 71B.

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.