Fonterra cut its forecast for milk collections in New Zealand, the world's biggest exporter, after wet weather extended the poor start to the season, in a potential support to world dairy prices.
Fonterra - which processes the vast majority of New Zealand milk production, making its forecasts a proxy for the country's overall fortunes – lowered by 35m kilogrammes of milk solids, to 1.54bn kilogrammes of milk solids, its forecast for it collections in 2017-18.
The forecast slashed to 0.9%, from 3.2%, growth in collections expected for the season, which ends in May next year.
And it reflected the continued drag on milk output from unduly wet weather.
"Weather conditions in August and September have impacted milk production across most of the country," Fonterra said, reporting slowdowns in both New Zealand's North and South islands.
Indeed, the co-operative's collection volumes in September fell by 1.1% year on year, dragging volumes so far in 2017-18 below year ago levels.
The Fonterra downgrade comes at a critical time for New Zealand milk output which is around its seasonal high, amid the so-called "spring flush" in production.
And it contrasts with expectations of many commentators - such as Rabobank, which two weeks ago forecast milk output growth of 2.5-3.5% this season – that the incentive provided by firmer markets would underpin expansion.
Indeed, Fonterra's downgrade is even more severe than one last week by Bank of Zealand, which cut its estimate for output growth to a "1-2% range, rather than a 3-4% range".
Bank of New Zealand noted that "milk production is ramping up in spring, but we suspect it will not be quite as strong as it usually is given recent weather conditions."
The bank added that New Zealand's weaker milk output prospects looked like tempering prospects for growth in the country's dairy export volumes this season "by a couple of percentage points".
In value terms, "moderate growth in exports… is still expected as more milk continues to get directed towards higher value products".
The bank added that "less growth in New Zealand milk supply should offer some support for dairy prices", which will be tested on Tuesday at the next GlobalDairyTrade auction.
While prices "unexpectedly fell" at the last auction, two weeks ago, "this particular result may reflect Golden Week holiday in China", the world's top dairy-importing country.
By Mike Verdin