W2 Constable

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Slide1: 

Greg Constable, CSIRO Plant Industry, Narrabri R&D to address sustainability issues in the Australian cotton industry

Cotton R&D structure: 

Cotton R&D structure Research CSIRO State Departments of Agriculture Universities Cotton R&D Corporation Research funds from levy on production Australian Cotton Growers Research Association Australian Cotton Industry Council Cooperative Research Centre

Sustainability issues: 

Sustainability issues Soil Structure Biology Fertility Salinity Pesticide dependence Insects Weeds Water And impact of all of these on the environment

Overview: 

Overview The cotton production system has been constantly evolving in all areas: Weed Water Soil Disease Insect The total system package includes a spectrum from biotechnology to machinery …

The Australian cotton industry : 

The Australian cotton industry Sixth largest producer; third largest exporter Price driven by US, China, $AUD/US Value of production = $1.2-1.6 billion Dryland and Irrigated (90%) Produced from 500,000ha

WEEDS: 

WEEDS Integrated Weed Management Rotation Cultivation Herbicides Hand chipping RR cotton (45%)

Roundup Ready statistics: 

Roundup Ready statistics Pre plant residual herbicides 34% Planting herbicides 30% Knockdown herbicides 21% Over-the-top selective herbicides 69% Layby residual herbicides 2.2% Cultivation 28% Manual hand hoeing 58% % reduction v conventional

WATER: 

WATER Perceptions Water use efficiency Salinity Irrigation systems

Drought v production: 

Drought v production

Cotton water research: 

Cotton water research Irrigation scheduling Long term climate analyses Surveys of irrigation efficiency Irrigation design Irrigation systems

OUTCOME: Water Use Efficiency: 

OUTCOME: Water Use Efficiency Gwydir Valley trend Water balance studies

Farm water delivery/use: 

Farm water delivery/use Drip irrigation Soil type Delivery Salinity Hydrology ?

SOIL: 

SOIL Major soil type is a grey cracking clay High water holding capacity Prone to compaction Prone to waterlogging Relatively fertile Low organic matter Sodic at depth

Soil research: 

Soil research Tillage and or crop rotation to maintain good or repair poor structure Fertilizer: diagnosis and management Soil biology: VAM, diseases Salinity modelling: soil type, hydrology

SOIL management changes: 

SOIL management changes Rotation – wheat and others (70’s) Tillage – min till + permanent beds (80’s) Fertilizer – N to N, P, K, gypsum (90’s) Benefits Yield Nutrition Water use efficiency Is yield a soil health indicator? irrigation v dryland

Agronomy research: 

Agronomy research Plant spacing Sowing date Growth regulator Dryland – irrigation Rotation – soil type Region X

Cotton diseases in Australia: 

Cotton diseases in Australia More * are more disease or more breeding success

Pathology research: 

Pathology research Crop management disease ecology soil biology: VAM, disease rotation Breeding for resistance

Slide19: 

Insect pests – a major challenge Cotton is attractive to insects; they are numerous in Australia Helicoverpa spp., other Lepidoptera, mites, sucking pests. significant constraint on production in many regions. >30% of variable costs. 80% of pesticides

Why do we seek to develop IPM?: 

Why do we seek to develop IPM? Environmental issues: Pesticide contamination of rivers Pesticide residues in livestock Economic Issues: Development of resistance Cost of new products Social Issues: Use of toxic or high odour chemicals (OH&S, off-target impacts on health and well-being); public perception

Pest management research: 

Pest management research Damage thresholds Crop compensation for damage Host plant resistance Soft pesticide options Biological control Beneficial insects Resistance management for insecticides transgenics Integrated Pest Management to Area Wide Management

Ingard: 

Ingard Bt gene from Monsanto – toxic to Helicoverpa. Limit 30% of area - resistance management. Six year mean benefit of Ingard over conventional = $77/ha. From savings on insecticide costs less Ingard license fee (currently $190/ha). Bollgard II from 2004 = better efficacy and substantially improved resistance management.

Slide23: 

Difference: Ingard Average 60% reduction in Helicoverpa sprays 3.79 9.34 1.31 1.23 0.49 0.5 0.41 0.34 0.23 0.29 0 2 4 6 8 10 Helico Aphids Mirids Mites Thrips INGARD Conventional

Integrated Pest Management: 

Integrated Pest Management

OUTCOME: Insecticides active ingredient / ha on cotton: 

OUTCOME: Insecticides active ingredient / ha on cotton Source: CCA Market Audit Survey Data 2003 IPM IPM + Ingard

CONSEQUENCE: Endosulfan levels in the Namoi River: 

CONSEQUENCE: Endosulfan levels in the Namoi River

Plant breeding: 

Plant breeding Conventional breeding Yield and adaptation Fibre quality Disease resistance Host plant resistance Biotechnology Transgenic varieties (RR, Ingard) New traits Marker assisted breeding CSIRO varieties marketed by Cotton Seed Distributors in Australia and internationally (FiberMax) including Europe

Biotechnology: 

Biotechnology Traits to benefit producer, environment (and consumer?) Regulatory studies Gene transfer Weediness Resistance management

Measured variety yield progress: 

Measured variety yield progress Mean of at least ten sites each year (from Constable et al 2001)

OUTCOME: Industry yield progress: 

OUTCOME: Industry yield progress Nearly half the increase is due to conventional breeding

Components of yield improvement: 

Components of yield improvement Total breeding 45% Considerable research on each topic

Extension – having good research adopted: 

Extension – having good research adopted Incentive to change: bonus or penalty Local Industry Development Officer Decision Support Tools: Written technical manuals Web site Computer package: CottonLOGIC EntomoLOGIC NutriLOGIC HydroLOGIC Post Graduate Certificate in cotton production delivered at University

Conclusion-summary: 

Conclusion-summary System package is changing all the time, Main contributors for progress: Crop rotation – soil, water, yield. Breeding for disease resistance – yield. Pest management IPM+GMO – environment. So … it is more sustainable; but there is more R&D to do.