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ADVICE SUMMARY PRODUCT APPLICATION

Product name: Applicant: Product number: Application number: GAUCHO 600 FLOWABLE SEED DRESSING INSECTICIDE BAYER CROPSCIENCE PTY LTD 46227 36263 Variation of label approval to include a new rate for aphids in cotton and a change to critical comments.

Purpose of Application and Description of Use: Active Constituent(s): Regulatory Decision: To grant the application and approve the label. ADVICE IMIDACLOPRID

External Efficacy Reviewer Gaucho ® 600 FS is already registered in Australia for the control of thrips and brown flea beetle at the rates of 580mL (350gai), 875mL (525gai) and 1.17L (700gai) /100kg seed and for the control of aphids at 875mL and 1.17L/100kg seed. This application is for the extension of the claim for Gaucho ® 600 Flowable Seed Dressing Insecticide in cotton to include aphids at the lower rate of 580mL/100kg seed. The claim is made that cotton seed treated with Gaucho ® 600 FS at the rate of 580mL/100kg seed protects emerging cotton plants from aphids during the early plant establishment stage.

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Data are presented from 4 field trials and are supported by published data on 1 pot trial. The field trials were conducted at various sites across a range of environments representing areas where cotton is commercially grown in Australia. All trials are of a random block design with appropriate replicates and controls. All give details of the crop, experimental conditions, location, the formulation and application rates. All describe assessment methods and give appropriate details of statistical analysis of results. The results from all trials show that Gaucho ® 600 FS, at rates of 580mL/100kg seed and higher, effectively controlled aphids during the early stages of crop establishment (though the length of time for which this control was effective varied). Thus the data provided supports the proposed extension of the label and justifies the amendment of Directions of Use to include aphids in cotton at the rate of 580mL/100kg seed. Data relied on to provide the advice

Data No Data Source* Author(s) Title Date Data Type Data Sub-type Authorising Party Inherited Application No.

152

S

153

S

G.A. Herron, G.Gullick and J.Holloway Ian Wickham and Anthony De Monte

Amparo: A new cotton seed-dressing mixture of imidacloprid and thiodicarb Comparison of tank mixes of Gaucho 600 FS plus Semevin P 500 FS with Semevin Super 480 FS, Gaucho or Cruiser 600 FS applied alone for the control of cotton aphid (Aphis gossypii), cotton seedling thrips (Thrips tabaci) and true wireworm (Agrypnus variabilis) in cotton, variety Sicot 289RRi. Wee Waa, NSW. 20032004. Comparison of Gaucho 600 FS +/- Semevin P 500 FS, with Cruiser 350 FS and Semevin Super 480 FS seed dressings for the control of cotton aphid (Aphis gossypii) in cotton cv. Sicot 289 RRi. Walkamin, Qld. 2004. Comparison of Gaucho 600 FS +/- Semevin P 500 FS, with Cruiser 350 FS and Semevin Super 480 FS seed dressings for the control of cotton aphid (Aphis gossypii) in cotton cv. Sicot 289 RRi. Walkamin, Qld. 2004. Comparison of Gaucho 600 FS plus Semevin P 500 FS with Gaucho and Semevin Super 480 FS seed dressings for the control of cotton aphid (Aphis gossypii) and thrips (Frankliniella

2004

Efficacy and Safety

Efficacy

Public

29.11.0 4

Efficacy and Safety

Efficacy

Applicant

154

S

Keith Lewis and Michael Gorton

18.08.0 4

Efficacy and Safety

Efficacy

Applicant

155

S

Keith Lewis and Michael Gorton

18.08.0 4

Efficacy and Safety

Efficacy

Applicant

156

S

J.R. Thompson and R.J. Mayer

16.12.0 4

Efficacy and Safety

Efficacy

Applicant

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schultzeii) in cotton cv. Sicot 80. Kununurra, WA, 2004.

* S = Data submitted with the application I = Data inherited (that is, referenced) from another application

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