Agrochemical Updates

Switch Fungicide export WHP update

Switch Fungicide was granted registration by the National Registration Authority in late 2000 for the control of grey mould (Botrytis cinerea) in grapevines.

Switch is a Syngenta product, and contains two active constituents, cyprodinil and fludioxonil. Cyprodinil is a Group I (anilinopyrimidine) fungicide and fludioxonil is a Group L (phenylpyrrole) fungicide.

Previously, it was recommended that Switch should not be used after 80% capfall if the grapes were destined for wine to be sold overseas. This allowed for one to two sprays up to 80% capfall, as indicated on the label.

This restriction has now been ammended so that:

For export grapes, Switch can be applied as a single application prior to the commencement of bunch closure (E-L 31), but should not be applied within 60 days of harvest.

Switch should not be applied at both flowering and growth stage E-L 31.

Note: E-L 31 is the grapevine growth stage when berries are pea-sized (7mm diameter). Refer to Coombe, B. (1995) Grapevine growth stages – The modified E-L system. Australian Journal of Grape and Wine Research (1) pp 100-110.

This information is provided to inform the wine industry of agrochemical product information, and should not be interpreted as an endorsement.