Canola blackleg and sclerotinia*

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1 Canola blackleg and sclerotinia* * Always use Prosaro according to the most recent registered label

2 Update Feb 2012 Blackleg Prosaro continued to show a high level of efficacy on blackleg. Application for registration was submitted in April Efficacy has been reviewed and accepted. Sclerotinia Application for registration to occur in Excellent control from Prosaro at 375 to 450 ml/ha.

3 Aim: 2011 Blackleg Trials To determine the yield response to Prosaro across a range of canola cultivars grown in high blackleg risk situations Clarify the optimum timing of application E = (2 leaf) M = (4 to 6 leaf) M, L = (4 to 6 leaf) + (green bud) Clarify the use of Jockey Stayer seed treatment for blackleg control

4 Varieties Blackleg resistance rating ATR-COBBLER TAWRIFFIC TT CRUSHER TT HYOLA 555 TT SA03 Riverton, SA WA02 Mt Barker, WA NW03 Junee, NSW VA02 Bordertown, SA VA21 Inverleigh, Vic SFS Lake Bolac, Vic

5 Disease & Yield Summary across trials x variety - Response to Jockey Stayer

6 NW03 Prosaro for control of blackleg in canola Blackleg - leaf infection 97 DAP Cobbler Tawriffic Crusher % Severity UNTR JOCKEY STAYER UNTR + PROSARO 375 ml (M) JS + PROSARO 375 ml (M)

7 25 NW03 Prosaro for control of blackleg in canola Blackleg - % lodged plants Cobbler Tawriffic 20 Crusher % Lodged UNTR JOCKEY STAYER UNTR + PROSARO 375 ml (M) JS + PROSARO 375 ml (M)

900 800 700 Yield response - compared to Untreated (MS varieties) (FD11AUSBA1) SA03 NW03 VA02 WA02 600 VA21 500 Lake Bolac kg/ha 400 300 200

8 Yield response - compared to Untreated (MS varieties) (FD11AUSBA1) SA03 NW03 VA02 WA VA Lake Bolac kg/ha JOCKEY STAYER UNTR + PROSARO 375 ml (M) JS + PROSARO 375 ml (M) NW03 WA02 Lake Bolac NW03 SA03 VA02 WA VA21 Mean Treatment Rate/ha

HYOLA 555 TT Yield response to Jockey Stayer and Prosaro kg/ha 500 450 400 350 300 250 200 150 100 50 0 Yield Response -

9 HYOLA 555 TT Yield response to Jockey Stayer and Prosaro kg/ha Yield Response - compared to Untreated (FD11AUSBA1) JOCKEY STAYER UNTR + PROSARO 375 ml (M) Treatment Rate/ha JS + PROSARO 375 ml (M) Mean SA03 VA21

10 Conclusion Prosaro will not substitute for a seed/sowing treatment (Jockey Stayer) Largest and most consistent yield responses are obtained when an effective seed/sowing treatment (Jockey Stayer) is applied is used as well as a foliar application of Prosaro (MS varieties).

11 Yield Summary across trials x variety - Response to Prosaro (following Jockey Stayer)

12 Yield response - compared to Prosaro only (all MS varieties) FD11AUSBA 800 mean 700 NW03 NW NW03 kg/ha SA03 SA03 VA02 VA02 WA02 WA JS + PROSARO 375 ml (E) JS + PROSARO 375 ml (M) JS + PROSARO 450 ml (M) JS + PROSARO 375 ml x 2 (M,L) JS + PROSARO 450 ml x 2 (M,L) WA02 VA21 VA21 Lake Bolac -200 Lake Bolac Treatment Rate/ha

13 HYOLA 555 TT Yield response to Jockey Stayer and Prosaro Yield response - (compared to yield from Jockey Stayer only) kg/ha Mean SA03 VA PROSARO 375 ml (E) PROSARO 375 ml (M) PROSARO 450 ml (M) PROSARO 375 ml x 2 (M,L) PROSARO 450 ml x 2 (M,L) VA Treatment Rate/ha

15 Prosaro 420 SC blackleg control in canola (FD10AUSBB1SA06, ATR-Cobbler, Kapunda SA, 2010) Untreated Jockey Stayer Jockey Stayer & Prosaro 450 ml early Jockey Stayer & 2 x Prosaro 450 ml

16 Prosaro 420 SC blackleg control in canola (FD10AUSBB1SA06, ATR-Cobbler, Kapunda SA, 2010) Jockey Stayer Untreated Jockey Stayer & Prosaro 450 ml early Jockey Stayer & 2 x Prosaro 450 ml

17 FD11AUSBA1SA03

18 FD11AUSBA1SA03

19 FD11AUSBA1SA03

20 FD11AUSBA1SA03

21 Prosaro proposed Label Crop Canola Disease/ Use Blackleg (Leptosph aeria maculans) Rate 375 to 450 ml/ha Critical Comments Apply at the 4 to 6 leaf crop stage of blackleg susceptible varieties (blackleg ratings of MR- MS or lower) or in situations of high blackleg risk (refer to General Instructions - Disease control in Canola). Will reduce lodging and stem canker from blackleg. A follow up application may be required at the green bud stage in high disease risk situations or where an effective blackleg seed treatment has not been used.

22 Prosaro proposed Label General Instructions: Disease control in canola Higher blackleg risk can be expected in higher rainfall districts (above 500 mm annual rainfall), where crops are grown within 500 m of a previous years stubble and in later sown crops (May to August). Other factors will also increase the risk of blackleg infection, including the intensity of canola cropping in a district, rainfall before sowing and the frequency of growing the same canola cultivar. Consult industry guidelines for more detailed assessment of blackleg risk in specific situations.

23 Summary Bayer work For effective blackleg control a seed treatment of Jockey Stayer gives early protection of seedlings. A foliar spray of Prosaro then controls later infection and reduces the internal infection (canker). A foliar application of Prosaro will not make up for the lack of an effective seed/sowing treatment for blackleg.

24 Blackleg control in canola Potential use situations: Varieties with low blackleg resistance ratings Close rotations High risk paddocks/regions Varieties where resistance may be breaking down

25 Sclerotinia in canola Current situation: Not a very well understood disease. Irregular infection outbreaks across Australia When infection does occur can cause severe crop losses

Intake Combi Sapphire In-Furrow Approved 4 April 2018 Page 1. APVMA Approval No.: 66358/111689

Intake Combi Sapphire In-Furrow Approved 4 April 2018 Page 1 APVMA Approval No.: 66358/111689 Intake Combi Sapphire In-Furrow Approved 4 April 2018 Page 2 DIRECTIONS FOR USE RESTRAINTS DO NOT use open