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Target spot control helps green leaf retention, delivers pleasing yield

Tasmanian grower Tim Walker benefits from using MIRAVIS in his potato crop.
Tim Walker said it was sometimes the "unintended trials" that were the "most telling".

Fourteen days can make a huge difference to potato yields particularly late in the season when target spot pressure begins to build.

Just ask Tim Walker who harvested better than 70 tonnes a hectare on Tasmania’s north west coast in April 2019.

“Using MIRAVIS® to control target spot gave me a significant yield advantage,” he said.

“Every day we can keep those leaves green, the yield is growing for us.”

The crop was sown on October 27, 2018, with Mac 1 seed at 3.5 tonnes/ha, on 9.5 inch row spacings.

In-season target spot control began at flowering with an application of AMISTAR® TOP at 500mL/ha. This was followed by the high label rate of MIRAVIS at 375mL/ha.

His decision to both use and recommend MIRAVIS this past season - as a farmer and lead agronomist of Walker Ag – was driven by its ease of use.

“About half of my clients used it and we didn’t see any issue with compatibility,” he said.

“The fact that it’s rainfast within one hour and offers up to 21 days of protection means we’re able to use it late."

Tim Walker said it was sometimes the unintended trials that best demonstrated the value of a product like Syngenta's MIRAVIS.

Tim said the efficacy of MIRAVIS had been no better demonstrated than on his own farm where he missed treating a 40m strip.

“I ran out and didn’t bother going back,” he said.

“That strip, which wasn’t treated with MIRAVIS, died off nearly three weeks sooner.”

The crop was harvested on April 10, pushing 72 tonnes/ha.

“Even if it was only a couple of tonnes difference a hectare, it would be worth using but it’s much better than that,” Tim said.

“There’s a significant advantage with MIRAVIS. Sometimes it’s these unintended trials that are the most telling.

“My only regret is that I didn’t have a bigger paddock planted.”