CSD varieties incorporating Bollgard 3 technology

CSD varieties incorporating Bollgard 3 technology

CSDCotton Seed Distributors (CSD) is currently conducting a large scale seed increase program and an associated commercial scale variety performance trial program, in both irrigated and dryland production systems, to facilitate the introduction of a new suite of varieties containing Bollgard 3 technology in the 2016/17 cotton season.

The program includes an extensive replicated variety testing and evaluation program across full fields incorporating the CSD Ambassador Network. The technology is being managed in accordance with the Bollgard 3 Resistance Management Plan. Based on results gathered from many years of trial development, analysis and detailed monitoring of our seed increase crops, CSD expects to have large volumes of planting seed available in the 2016/17 season.

Cotton growers will be able to see these varieties in the field at a series of field days conducted in 2016.

Comparison of varietal characteristics

Table 1: Comparison of varietal characteristics containing Bollgard 3

Maturity Variety-maturity-arrow
Variety Sicot 714B3F Sicot 746B3F Sicot 748B3F Sicot 754B3F
Season Mid to full season
Normal leaf variety with excellent yield potential.
Full season
Normal leaf variety with excellent yield potential.
Full season
Normal leaf variety with excellent yield potential.
Full season
Normal leaf variety with excellent yield potential.
Production suitability Irrigated and dryland Irrigated and dryland Irrigated and dryland Irrigated
Foliage Dark green Dark green Dark green Lighter green
Compared to other varieties.
Growth habit Compact
Avoid stress early in flowering period
Intermediate
Depending on boll load and seasonal conditions.
Vigorous
Depending on boll load and seasonal conditions.
Vigorous
Boll size Large
A tendency to fruit earlier in the season, more suited to shorter season growing areas.
Large
A tendency to fruit late into the season, careful management post cut-out is desired to reach full yield potential.
Large
A tendency to fruit late into the season, careful management post cut-out is desired to reach full yield potential.
Medium to large
A tendency to fruit late into the season, careful management post cut-out is desired to reach full yield potential. Higher fibre qualities especially length offers opportunity in the marketing of this variety
Planting considerations Care at planting should be taken to ensure the correct plant population is established to ensure optimum yield. Seed density is lower than Sicot 714B3F, so care at planting should be taken to ensure the correct plant population is established to ensure optimum yield. Seed density is lower than Sicot 714B3F, so care at planting should be taken to ensure the correct plant population is established to ensure optimum yield. Seed density is lower than Sicot 714B3F, so care at planting should be taken to ensure the correct plant population is established to ensure optimum yield.
Disease resistance Resistant to Bacterial blight.
Similar Fusarium and Verticillium Wilt disease resistance to current commercially available varieties.
Resistant to Bacterial blight.
Similar Fusarium and Verticillium Wilt disease resistance to current commercially available varieties.
Resistant to Bacterial blight.
Similar Fusarium and Verticillium Wilt disease resistance to current commercially available varieties.
Resistant to Bacterial blight and class leading resistance to Fusarium wilt.
Similar Verticillium Wilt disease resistance to current commercially available varieties.

 

The introduction of biotechnology in cotton has delivered large productivity and environmental benefits to the Australian cotton industry over the last 20 years. CSIRO and CSD are committed to releasing new varieties that deliver performance improvements in terms of yield, fibre quality, disease resistance and regional adaptability. Importantly the agronomic and management characteristics of the new varieties are in line with the expectations of Australian cotton growers.

Over the past seasons the CSD Extension and Development team has conducted extensive in crop, yield and fibre quality monitoring and evaluation and late season ‘segmented picking’ to compare the growth habit and yield and quality components of the new varieties containing the Bollgard 3 technology. We used Sicot 74BRF as the comparator, given it is the highest yielding Australian cotton variety containing Bollgard II® technology.

2014/15 season results

In ten commercial sized irrigated trials, featuring either two or three of the new varieties, Sicot 74BRF was grown in the balance of the field. Table 2 shows the yield and quality from seven of these trials that included all four varieties.

Varieties containing Bollgard 3 technology: yield and quality

Source:  6 CSD trial sites – 2014/15

Yield Relative Yield % Fibre Length Micronaire
Sicot 746 & 748B3F 14.08 102.3% 1.20 4.2
Sicot 754B3F 13.01 94.5% 1.25 4.0
Sicot 714B3F 13.60 98.8% 1.19 4.0
Sicot 74BRF* 13.76 100% 1.19 4.2

* Check varieties containing Bollgard II

CSIRO has been conducting yield, quality and disease ratings on varieties containing Bollgard 3 technology over the past three to four seasons across a number of regional sites. Table 3 summarizes this longer term data, with preliminary disease rankings for the new varieties containing Bollgard 3 provided in Table 4.

Longer term small plot trial data, cotton varieties containing Bollgard 3

Source:  CSIRO 3 seasons; 18 sites

Trial Variety Yield (b/ha) Relative Yield % Turn Out % Length Strength Micronaire
Sicot 714B3F 13.98 96 42.2 1.20 30.4 4.5
Sicot 748B3F 14.62 101 44.0 1.24 31.0 4.6
Sicot 746B3F 14.59 101 45.3 1.21 30.8 4.6
Sicot 754B3F 13.91 96 43.1 1.25 31.4 4.5
Sicot 71BRF* 13.59 94 41.0 1.22 30.2 4.4
Sicot 74BRF* 14.49 100 44.3 1.23 30.5 4.7
Sicot 75BRF* 14.02 97 43.2 1.26 30.9 4.6

*Check varieties containing Bollgard II

Table 4: Preliminary Disease Rankings for new varieties containing Bollgard 3

Source: CSD and CSIRO data

F.rank (Fusarium) V.rank (Verticillium)
Sicot 746B3F 139(9) 102(1)
Sicot 748B3F 135(5) 100(1)
Sicot 754B3F 155(5) 101(1)
Sicot 714B3F 130(7) 101(1)

 

Further evaluation

dryland-Bollgard-3-variety-trialDuring the 2015/16 cotton season the CSD Extension and Development Team has an extensive trial and evaluation program in place to fully test, monitor and evaluate the new suite of varieties containing Bollgard 3.

Currently CSD has a commercial scale variety trial program spanning the length and breadth of the Australian cotton industry with 48 irrigated sites and 14 dryland sites. Additional monitoring and evaluation is been carried out in 58 irrigated and 11 dryland commercial cotton fields as part of the CSD Ambassador Network.

It is envisaged that information and the experience gathered from these sites will enable the CSD to provide growers and crop managers with relevant information on the performance of the new suite of varieties containing Bollgard 3, informing their variety selection.

*Bollgard 3 is not a registered product and is subject to APVMA approval.