EUTYPA LATA: Eutypa
lata is a vascular pathogen of grapevines and other woody plants. This
means it lives inside your grapevines and lives off the glucose-rich
polymers that bind together the wood.
Eutypa is actively spread during pruning time in during wet
weather. Eutypa’s spores spread via rain and wind splash. It is recommended to
only pruning vineyards with high levels during dry weather and close to
budburst (EL-4-5). This may not be practical in many situations.
Research shows that it is possible to stop Eutypa from infecting
freshly made pruning cuts during wet weather. Creating a barrier either
physically or with registered chemicals may be a practical solution.
The fungicide Emblem is currently registered and available. The fungicidal paint GREENSEAL is a specially developed pruning wound dressing incorporating a tough, rubber like acrylic resin and a powerful fungicide with disease control capabilities. GREENSEAL is easy to apply and dried quickly to seal off pruning wounds on grapevines to provide protection against Eutypa lata. GREENSEAL is now available in a 10lt size which is useful for large vineyards.
OTHER FUNGAL DISEASES: remain dormant until after bud-burst
(EL-4/5).
SNAILS: The first hatchings of juvenile snails have been
seen this week. Sites with a history of snail damage will need to be monitored
closely during August.
GRAPEVINE SCALE: We have been through vineyards with a
history of high grapevine scale severity. At this point we are seeing lower
numbers than previously recorded.
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