Signum WG: new opportunity to control powdery mildew on cucumbers

Sergey Bistrichanov, Miroslav Tityanov, Milena Dimova

Abstract: Cucumbers annually are threated from foliar diseases that can compromise yield. The most frequently encountered are angular spots, mildew and powdery mildew. The latter one cause Erysiphe cichoracearum De Candolle and Sphaerotheca fuliginea Pollaci, There are various control measures, but basic remains a chemical method. In 2012, in field trials we tested the efficacy of product Signum WG (a.i. boksalid 267 g/kg + pyraclostrobin 67 g/kg) at 100 g/kg and control Topaz 100 EC – 0.025% (a.i. 100 g/l penconazole) in cucumbers Levina variety. The tests were according the guidelines № 181, 152 and 135 OERR, methodologies № F1/20/1 and № RR1/2/3 / EPPO. The product presence contact and systemic action was selective to cucumbers and the degree of infestation in treated variant is about 5 to 7.5% lower than that of the untreated. The efficacy of Signum in tested dose is identical to the standard and we recommend involving it in the plant protection set products we use during cucumber vegetation.

Keywords: cucumber; powdery mildew; Signum WG

Date published: 2017-07-12