Technical Update Pdf - Syngenta

Anti resistance strategy
• Azoxystrobin is a strobilurin and an important fungicide
for broad-spectrum disease control in bulb onions,
garlic and shallots, helping to maximise marketable yields
• Mixing fungicides with different modes of action may help
minimise resistance development. OLYMPUS is a mixture
of a strobilurin with a chloronitrile fungicide active against
the same key diseases in onions
• To safeguard the future of the strobilurin fungicides it is
important to further alternate OLYMPUS with alternative
modes of action
• The FRAC recommendations for the number of strobilurin
treatments in a programme, when applied in a mixture
such as OLYMPUS are as follows:
Total number
of fungicide
applications per crop
Up to
5
6 7 8 9 10
Botrytis
Maximum recommended
strobilurin sprays
in mixture
2 3 3 4 4 5
OLYMPUS – Botrytis squamosa control in bulb onions
FOLIO GOLD fb OLYMPUS fb
dimethomorph+mancozeb (x2)
OLYMPUS 2.5 l/ha (x6)
mancozeb fb dimethomorph
+mancozeb (x3)
Untreated
OLYMPUS sets new standards
controlling leaf spot Botrytis squamosa
Trial at Stapleford cv. Sunskin 2006
Spray Programme: started at 4-6 leaves.
6 sprays applied at 7-14 day intervals. LSD: 8.5
0 10 20 30 40 50
% Green leaf area 3 weeks after final application
(Impact of botrytis spp. infection)
In a 6 spray programme:
1 x AMISTAR + BRAVO may be applied in addition to 2 x OLYMPUS
OLYMPUS – benefits and strengths
Proven and tested
active ingredients
Broad spectrum activity
Highly protectant
activity
Improved quality
Tank mixing efficiency
The active ingredients in OLYMPUS, azoxystrobin and chlorothalonil are well tried and
tested in onions
Trials have demonstrated good efficacy against the major pathogens; Leaf Spot - Botrytis squamosa
and Leaf Blotch - Cladosporium as well as useful suppression of downy mildew. Use in alternation
with specific downy mildew products for best control.
During periods of high disease pressure, maintain a 7 day spray programme. Both active ingredients
prevent the spread and development of the major diseases
Excellent disease control combined with the strobilurin effect of azoxystobin encourages the green
canopy to persist and delays senescence. This enhances both skin retention and colour of the
onions improving marketability
OLYMPUS has been successfully mixed with trace elements and fungicides. This includes brands
of Manganese sulphate and Magnesium sulphate
Syngenta Crop Protection UK Ltd CPC4, Capital Park, Fulbourn, Cambridge CB21 5XE Tel: Cambridge (01223) 883400 Fax: 01223 882195
Technical Enquiries Tel: 0800 169 6058 E-mail: customer.services@syngenta.com Website: www.syngenta-crop.co.uk
AMISTAR®, FOLIO GOLD®, and OLYMPUS® are Registered Trademarks of a Syngenta Group Company. BRAVO® is a Trademark of GB
Biosciences. AMISTAR (MAPP 10443) contains azoxystrobin, BRAVO (MAPP 10518) contains cholorothalonil, FOLIO GOLD (MAPP 10704)
contains metalaxyl-M and chlorothalonil, OLYMPUS (MAPP 13797) contains azoxystrobin and chlorothalonil. All other brand names used
are trademarks of other manufacturers in which proprietary rights may exist. Always read the label. Use pesticides safely.
©Syngenta AG March 2008. VEG44. GQ.