Protectorhml™
Withholding Period Reduced
Protectorhml at 2% for Botrytis Control:
- From 14 days to 3 days
Protectorhml at 0.5% for adjuvant use (BioGro certified):
- From 14 days to 1 day
Protectorhml is a liquid containing specific complexes of potassium soaps. Collectively, these soaps are also known as ‘soft’ soaps, or potassium salts of fatty acids. All ingredients involved in its manufacture are food or food grade.
Protectorhml is fully registered by New Zealand Food Safety Authority (ACVM) – registered number P7149. Its use is as a fungicide for botrytis control on wine grapes, and as an adjuvant to assist with other fungicides in their activity on grapes and other crops.
A good example of adjuvant use would be the combination with sulphur for powdery mildew control on wine grapes or apples.
Use of Protectorhml with other ‘soft’ products to enhance overall efficacy is a key focus for further research.
Protectorhml is BioGro™ approved for use as an adjuvant with other BioGro™ approved fungicides and insecticides – licence number 5079.
Why the Reduction in the Withholding Period?
The withholding period for Protectorhml is voluntary and has nothing to with MRLs.
Incremental manufacturing improvements now ensures that Protectorhml is virtually free of vegetable oils. Free vegetable oils can create an off flavour like mouldy sacking and that was the reason for voluntary withholding period.
The voluntary withholding period is now reduced to 3 days for a 2% Protectorhml application and 1 day for when used as an adjuvant at 0.5% for which it is BioGro registered.
These withholding periods remain conservative.
This change applies to all Protectorhml with a manufacturing date of 22 September 2010 or later.
Further reductions may apply following micro vinification studies this season.
Protectorhml and Organic Vineyard Management
Chris Henry has undertaken the vineyard management of a 15ha organic vineyard on the Gimblett Gravels in Hawkes Bay for the 2009 and 2010 seasons. For a description of the vineyard management practices for the 2010 season, click here. This was presented by Blake Herbison of Skelton Ivory at Bragato 2010.
The actual spray log can be found here with the kind permission of Brett Murdoch, owner of Murdoch Wines.
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Label and safety information
Protectorhml product label [PDF/683kB]
Protectorhml material safety data sheet [PDF/103kB]
Protectorhml product safety data card [PDF/74kB]
Promotional material
Protectorhml and Organic Vineyard Management – an article presented by Blake Herbison, Skelton Ivory at Bragato 2010 [PDF/10.5kB]
2010 Technical notes for the use of Protectorhml for Powdery Mildew and Botrytis control [PDF/378kB]
Evaluation of Protectorhml and sulphur for control of powdery mildew on grape 2006/07 and 2007/08 – presentation [PDF/135kB]
Protectorhml brochure [PDF/213kB]
Research and development
Evaluation of Protectorhml and sulphur for control of powdery mildew on grape 2006/07 and 2007/08 – report [PDF/281kB]
Protectorhml and copper for control of powdery mildew on grape – summary of four years of Hort Research trials [PDF/52kB]
Protectorhml for control of botrytis on Grape – summary of seven years of Hort Research trials [PDF/48kB]
Eradicant trial (hand sprayed) on grape – verdelho raw results (2006–2007) [PDF/40kB]
Erinose Mite Trial 2007/08 – a program or single application [PDF/246kB]
Hort Research – black spot on apple [PDF/348kB]
Hort Research – powdery mildew on liberty apple [PDF/326kB]
Hort Research – bacterial screenings on fireblight, tomato spot and speck and kiwifruit blossom blight [PDF/786kB]
Hort Research – evaluation of organic products for powdery mildew control in apple [PDF/286kB]
Hort Research – geelen fireblight trial on pear [PDF/2048kB]
