Stroby WG

Manufacturer
BASF
Category
Fungicides
Registered until
2024-06-30
Registration number
51346
Active materials
Links

For the control of Black Spot (Scab) and Powdery Mildew in Apples and Scab in Pears.

DIRECTIONS FOR USE

APPLES
Disease: Black spot (scab) (Venturia inaequalis), powdery mildew (Podosphaera leucotricha)

PEARS
Disease: Scab (Venturia pirina)

Rate:
Dilute spraying: 10 g/100 L
Critical Comments: Concentrate spraying: Refer to the Application section in GENERAL INSTRUCTIONS
Application may commence at spurburst for black spot/scab, and at early pink stage for powdery mildew control. Apply at 7 to 10 day intervals prior to petal fall and during periods of rapid growth. Later applications should be at 10 to 14 day intervals, or according to prevailing weather conditions and disease incidence.
Apply by dilute or concentrate spraying equipment. Apply the same total amount of product to the target crop whether applying this product by dilute or concentrate spraying methods.
DO NOT use in equipment that requires concentrations greater than 50g Stroby/100 L water (5x concentration), as crop safety has not been assessed at these concentrations.
Ensure thorough and even coverage of all plant parts.
May be used with the recommended rate of a non- ionic wetting agent.
The use of STROBY is subject to an CropLife Fungicide Resistance Management Strategy. DO NOT apply more than three applications of STROBY or other Group K fungicides per season. Refer to Resistance Management Strategy in General Instructions for further details.

NOT TO BE USED FOR ANY PURPOSE, OR IN ANY MANNER, CONTRARY TO THIS LABEL UNLESS AUTHORISED UNDER APPROPRIATE LEGISLATION.

WITHHOLDING PERIODS:
APPLES, PEARS - DO NOT HARVEST FOR 6 WEEKS AFTER APPLICATION.
DO NOT GRAZE AREAS UNDER OR SURROUNDING TREATED TREES, OR CUT FOR STOCK FOOD, FOR 2 WEEKS AFTER APPLICATION
GROUP K FUNIGICIDE

GENERAL INSTRUCTIONS
FUNGICIDE RESISTANCE WARNING
STROBY is a member of the strobilurin group of fungicides. For fungicide resistance management, STROBY is a Group K fungicide. Some naturally-occurring fungal biotypes resistant to STROBY, and other Group K fungicides may exist through normal genetic variability in any fungal population. The resistant individuals can eventually dominate the fungal population if these fungicides are used repeatedly. These resistant fungi will not be controlled by STROBY and other Group K fungicides, thus resulting in a reduction in efficacy and possible yield loss. Since the occurrence of resistant fungi is difficult to detect prior to use, BASF Australia Ltd accepts no liability for any losses that may result from the failure of STROBY to control resistant fungi.

RESISTANCE MANAGEMENT STRATEGY
To prevent or delay the onset of resistance, DO NOT apply more than three sprays per season of STROBY or other Group K fungicides. If consecutive applications of Group K fungicides are used, then they must be followed by at least the same number of applications of fungicide(s) from a different group(s) before a Group K fungicide is used again, either in the current or following season.

INTEGRATED PEST MANAGEMENT
STROBY is suitable for use in Integrated Pest Management (IPM) programs.

EXPORT OF TREATED FRUIT
Growers should note that MRLs or import tolerances DO NOT exist in all markets for fruit treated with STROBY WG Fungicide. If you are growing fruit for export, please check with BASF on 1800 558 399 for the latest information on MRLs and import tolerances BEFORE using STROBY.

EQUIPMENT
Ground Application: STROBY can be applied with high volume (dilute) or low volume (concentrate) orchard spraying equipment that is fitted with mechanical or hydraulic agitation. Equipment should produce a fine, uniform spray coverage of all plant surfaces (stems, leaves and fruit).
Aerial Application: DO NOT apply by aircraft.

MIXING
Add the required amount of STROBY directly to the half filled spray vat with agitators in motion. Complete the filling of spray vat under constant agitation. DO NOT allow the spray mixture to remain in the tank for long periods without agitation.

APPLICATION
Dilute Spraying
- Use a sprayer designed to apply high volumes of water up to the point of run-off and matched to the crop being sprayed.
- Set up and operate the sprayer to achieve even coverage throughout the crop canopy. Apply sufficient water to cover the crop to the point of run-off. Avoid excessive run-off.
- The required water volume may be determined by applying different test volumes, using different settings on the sprayer, from industry guidelines or expert advice.
- Add the amount of product specified in the Directions for Use table for each 100 L of water. Spray to the point of run-off.
- The required dilute spray volume will change and the sprayer set up and operation may also need to be changed, as the crop grows.
Concentrate Spraying
- Use a sprayer designed and set up for concentrate spraying (that is a sprayer which applies water volumes less than those required to reach the point of run-off) and matched to the crop being sprayed.
- Set up and operate the sprayer to achieve even coverage throughout the crop canopy using your chosen water volume.
- Determine an appropriate dilute spray volume (See Dilute Spraying above) for the crop canopy. This is needed to calculate the concentrate mixing rate.
- The mixing rate for concentrate spraying can then be calculated in the following way:
EXAMPLE ONLY
1. Dilute spray volume as determined above: For example 1500 L/ha
2. Your chosen concentrate spray volume: For example 500 L/ha
3. The concentration factor in this example is: 3 X (i.e. 1500 L / 500 L = 3)
4. If the dilute label rate is 10 mL/100 L, then the concentrate rate becomes 3 x 10, that is 30 mL/ 100 L of concentrate spray.
- The chosen spray volume, amount of product per 100 L of water, and the sprayer set up and operation may need to be changed as the crop grows.
- For further information on concentrate spraying, users are advised to consult relevant industry guidelines, undertake appropriate competency training and follow industry Best Practices.

COMPATIBILITY
STROBY is compatible with Acaban+, carbaryl 500, Gusathion+ SC, Insegar+, Klartan+, Lorsban+ 250 WP,
Mimic+ 700 WP, Pyranica+ and Thiodan+ EC. For information on compatibility with other products please contact your local reseller or BASF representative.
DO NOT mix with Omite+ or products giving an alkaline reaction eg. Bordeaux mixtures or lime sulphur.

RAINFALL
STROBY exhibits good rainfastness once spray has dried on the tree, however its protectant cover may be reduced after 50-60 mm of rainfall.

PRECAUTION
Re-entry Period
Avoid entering treated areas until spray deposits have dried. When prior entry and handling of treated surfaces is necessary wear rubber gloves.

Registered for culturesPreharvest Interval
Apples42
Pears42