Exploring the control measures of white rust- organic amendments, botanicals, biocontrol agents and chemicals

Abstract

Three botanicals (Onion @5%, Eucalyptus@5%, and Neem @5%), two biocontrol agents (Trichoderma viride and Pseudomonas flourescens) and two fungicides (Ridomil MZ @2g/l and Carbendazim 50% @2g/l) were evaluated in vivo for their effectiveness to manage White rust of Mustard caused by Albugo candida. All treatments significantly reduced the severity of the disease with Ridomil MZ being most effective. Foliar spray of Ridomil MZ @2g/l significantly reduced White rust at (43%) followed by Eucalyptus@5% (45%), Neem@5% (47.6%), Onion@5% (54.8%), Carbendazim 50WP (56.4%), Pseudomonas flourescens (61.9%) and Trichoderma viride (63.4%) as compared to control. A maximum yield of (1670.3kg/ha) and minimum AUDPC (462.25) and infection rate of 0.0491 unit-days was recorded at Ridomil MZ. Seven organic matters (Vermicompost, FYM, Neem powder, Bone meal, Coir pith, VAM, Seaweed extract) were evaluated under greenhouse condition. All treatments significantly reduced the severity of the disease out of which Neem powder was most effective against Albugo candida with lowest recorded disease severity (22.80%) as compared to Control (46.63%) while lowest AUDPC (275.3) and Infection rate (0.007172 unit-days) was recorded in pots amended with Vermicompost. The current finding highlights the eco-friendly alternatives to manage White rust in the field over the conventional chemical pesticides.