Glacier FarmMedia COVID-19 & the Farm

Potato storage fungicide throws in three actives

A new post-harvest fungicide to preserve potato crops in storage gathers three active ingredients for use against fusarium dry rot and silver scurf.

Syngenta Canada last week announced the rollout for Stadium, a combination of fludioxonil (Group 12), azoxystrobin (Group 11) and difenoconazole (Group 3) for control of fusarium and suppression of silver scurf in potatoes and sweet potatoes.

Stadium will be unique in the potato fungicide market for the combination of three actives, the company said in a release.

Syngenta already markets azoxystrobin as an in-furrow treatment for potatoes under the name Quadris, and an azoxystrobin/difenoconazole combo for potatoes as Quadris Top.

It also sells difenoconazole for use in crops including potatoes as Inspire, and fludioxonil for use in fruit crops under the name Scholar. Fludioxonil is also an active in Syngenta’s Switch, for use in certain fruit and vegetable crops.

Maximum residue limits (MRLs) in potato products for export to several countries outside of North America have been established for Stadium’s actives, Syngenta noted; however, those MRLs aren’t harmonized with North American levels.

Thus, the company said, before they apply Stadium on a harvested crop, growers should check with their potato buyers.

Stadium’s registration also doesn’t extend to its use on seed potatoes, the company warned.

Storage disease pathogens can be controlled by limiting the spread of infection from diseased to healthy tubers. Fusarium dry rot, for one, occurs in just-harvested tubers when they’re wounded and come into contact with the fungus, the company said.

Silver scurf is also seed- and soil-borne, with seed-borne silver scurf being “more prevalent,” spreading through contaminated soil, equipment and debris. — Network



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