Rust spot in spuds alert
Rust spot in spuds alert
INTERNAL rust spot is set to be a major problem in maincrop potatoes this year, following late plantings and record spring rainfall, warns fertiliser supplier Hydro.
Poor calcium supply, irregular irrigation, variety choice and rapid tuber bulking can all exacerbate the condition, which is strongly linked to calcium supply, says the companys plant nutrition specialist Miles Harriman.
Applying granular Calcium Nitrate TropiCote has helped reduce IRS when applied as a top-dressing at tuber initiation. Unlike foliar applied calcium, which remains mostly in the leaves, it provides high levels of calcium around tuber skins and stolons at the key timing, he adds. "It also has the extra benefit of improving skin finish." *