Topas 200 EWPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

For the control of Powdery Mildew in Grapes, Cucurbits, Peas and Apples and Blackspot in Apples and Pears.

GENERAL INFORMATION
TOPAS 200 EW is a systemic triazole (DMI) fungicide with preventative and curative properties for the control of Powdery Mildew in a range of crops and Blackspot in pipfruit. TOPAS 200 EW penetrates rapidly into the leaf tissue, where it acts curatively on the developing fungal infections by inhibiting the creation of sterols in fungal cell walls. In apples, this action provides control of primary mildew infections and reduces both the infection of the fruit, which can occur soon after petal fall, and infected buds, which are a source of infection for the following season. In addition, TOPAS 200 EW in combination with a protectant fungicide, controls Blackspot by both a contact action on fungal spore germination and curatively within the leaf during the incubation period before symptoms appear.

RESISTANCE MANAGEMENT
TOPAS 200 EW is a member of the demethylation inhibitor (DMI) group of fungicides. For fungicide resistance management TOPAS 200 EW is a Group 3 fungicide. Some naturally occurring individual fungi resistant to TOPAS 200 EW and other Group 3 fungicides may exist through normal genetic variability in any fungal population. The resistant individuals can eventually dominate the fungi population if these fungicides are used repeatedly. These resistant fungi will not be controlled by TOPAS 200 EW and other Group 3 fungicides, thus resulting in a reduction in efficacy and possible yield loss.

PIPFRUIT
Apply a maximum of two DMI-containing products per season and only in mixture with an effective dose of a broad spectrum protectant fungicide that is not at risk from resistance.
A maximum of four DMI-containing applications can be made in extremely wet seasons, but only where there is no history of black spot control failure following DMI applications or where the property has a history of low DMI use.

DIRECTIONS FOR USE
It is an offence to use this product on animals.

APPLES, PEARS
Disease: Blackspot
Rate: 12.5 mL/100 litres of water as dilute spray
Critical Comments: For high volume spraying, apply as a dilute spray, ensuring complete coverage, without excessive run off. Apply in mixture with an approved protectant fungicide. For concentrate spraying, adjust dilution rate accordingly. Preventative: Apply in mixture with a protectant fungicide at no greater than 10 day intervals preferably from tight cluster to second cover. Curative: Apply TOPAS 200 EW plus a protectant fungicide as soon as possible but within 4 days of each Blackspot infection period.

APPLES
Disease: Powdery Mildew
Rate: 12.5 mL/100 litres of water as dilute spray
Critical Comments: Preventative: Apply in mixture with an approved protectant fungicide at 10 to 14 day intervals during the period from tight cluster to the end of extension growth.

CUCURBITS
Disease: Powdery Mildew
Rate: 125 mL/ha. For high volume spraying, mix 12.5 mL/100 litres of water ensuring a minimum of 1000 litres of water/ha
Critical Comments: As a low volume broadcast spray, apply in sufficient water to ensure complete foliage cover.
Make the first application as a preventative spray and repeat 14 days later. To minimise the risk of developing resistant disease strains, apply a maximum of 2 applications of TOPAS 200 EW, preferably in mixture with an approved protectant fungicide. Use non DMI fungicides at other times. DO NOT use as an eradicant when Powdery Mildew is widespread.

GRAPES
Disease: Powdery Mildew
Rate: 7.5 to 12.5 mL/100 litres of water. Apply sufficient mixture to give 75 to 125 mL product/ha
Critical Comments: Early in the season when disease pressure is low, use the lower rate at 14 to 21 day intervals. Under high disease pressure, use the higher rate at 14 day intervals. To minimise the risk of developing resistant disease strains, fungicides of other chemical groups, such as sulphur, should be used from bud burst as early season sprays for Powdery Mildew control. The first TOPAS 200 EW application should be made during early flowering, with repeat applications at 14 to 21 day intervals up to a maximum of 4 sprays, preferably in mixture with an approved protectant fungicide. No more than two DMI fungicides should be applied alone per season. DO NOT use as an eradicant.

PEAS
Disease: Powdery Mildew
Rate: 125 to 175 mL/ha
Critical Comments: As a low volume broadcast spray, apply in sufficient water to give complete foliage cover without run off. Apply the higher rate if the first signs of the disease are evident. The addition of wetting agent at manufacturer's label rates is recommended. Make a single application, preferably no later than flowering, either as a preventative spray before the disease is present, or at the first sign of disease symptoms. DO NOT use as an eradicant when Powdery Mildew is widespread.

MIXING
TOPAS 200 EW mixes readily with water. Add the required amount of TOPAS 200 EW to the partly filled spray tank and then add the remainder of the water with agitation.

APPLICATION
Aerial Application: Apply in a minimum of 65 litres of water/ha to ensure more than 20 droplets per square centimetre on all leaves. As there are many factors involved in aerial application, for optimum results, contact your local Syngenta Crop Protection representative for detailed information.

COMPATIBILITY
TOPAS 200 EW is compatible with other fungicides and insecticides likely to be used, except oil and strongly alkaline materials such as Bordeaux mixture and lime sulphur.
Note: As formulations of other manufacturers products are beyond the control of Syngenta Crop Protection Limited, all mixtures should be tested for crop safety and physical compatibility prior to mixing commercial quantities.

WITHHOLDING PERIODS
It is an offence for users of this product to cause residues exceeding the relevant MRL in the New Zealand (Maximum Residue Limits of Agricultural Compounds) Food Standards
Cucurbits .......................................................... 3 days
Peas ................................................................. 14 days
Grapes .............................................................. 28 days
Pipfruit .............................................................. 35 days

STORAGE
Store in cool, dry place, out of direct sunlight, avoiding temperatures below minus 5oC and above 35oC.