Heatburn has been observed on some vineyards. Only a small percentage of fruit has been burnt (turned pink). This will turn shrivel, turn hard and fall out of bunches before harvest. The heat also scorched leaves as shown (below).
|Scorched leaves from high temperatures in the vineyard.|
However despite the high temperatures vines are in better condition than Vintage 2009. Good news.
Monitor soil profiles to ensure they have adequate soil moisture before and during any further heatwaves. Experience from Vintage 2009 showed that it was best to water before heat stress rather than during heatwave conditions.
Remember vines use the most water during veraison. Avoid water stress to vines when berries soften and colour. Do not perform RDI (regulated deficit irrigation) during veraison.