10 November 1995

Net blotch still around

RECENT frosts have checked net blotch and mildew in winter barley. But thin disease-hit stands may still benefit from treatment if warm weather continues, according to ADAS.

Net blotch has been widely reported, particularly on forward crops of Fighter and Puffin, says Cambs-based John Garstang. But with at least two good frosts the disease has "stepped backwards".

Forward crops rarely respond to autumn fungicide treatment, he notes. But others still struggling in cloddy seed-beds could benefit if more than 25% of the leaf area is affected by net blotch.

"Quite a few of the crops round here are on soils still too dry for comfort. If frost hasnt held it, it will want jumping on."

&#8226 Conditions have also been conducive for yellow rust in winter wheat. Riband and Brigadier in traditional high-risk areas should be examined closely over the next four weeks, advises ADAS.