Tuesday, December 15, 2009

Downy Mildew Secondary Spread - ID Photos

Downy mildew secondary spread on bunches and leaves.


DJ's Agronomist Matthew Wilson has observed that Downy Mildew has spread in the Adelaide Hills.

He says, "The Secondary Downy Mildew Event recorded on the morning of the 8th of December 2009, has caused spread of primary Oilspots within unprotected, infected blocks.

Interestingly, the majority of this secondary spread is located below the cordon or on fresh growth either up high on VSP systems or out on tips with sprawled canopies. This new growth is difficult to protect, but growers should be reminded to adjust spray coverage as the canopies develop. This season’s growth rates (relative to previous seasons), require some level of adjustment."

Matthew will be keeping a close eye on the weather in the Adelaide Hills as part of the CropWatch Programme.

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