Fungicides evaluation against foot and stem rot incited by Phytophthora parasitica var. Sabdariffae in roselle

Field trials were conducted at Agricultural Research station, Amadalavalasa for four consecutive years during Kharif 2013–14, 2014–15, 2015–16 and 2016–17 to evaluate new fungicides against foot and stem rot incited by Phytophthora parasitica var. sabdariffae in roselle. Among the five different fungicides tested as seed dressing and foliar spray, seeds treated with metalaxyl MZ combined with its spraying at 30 DAS and 45 DAS resulted in less disease incidence (10.56%) at the time of harvest. it proved superior in all the parameters viz. plant height, basal diameter and green weight compared to untreated check. The next best treatments were trifloxystrobin (12.34%), azoxystrobin (14.88%), cymoxanil (18.52%) and copper oxychloride (19.12%). Highest disease incidence (33.11%) was recorded in control plot along with lowest fibre yield. Highest disease incidence was recorded after 120 days of sowing. All the fungicidal treatments have shown moderately susceptible (MS) reaction compared to control plot (highly susceptible reaction).