Efficacy of integrated disease management (IDM) modules for okra yellow vein mosaic virus in semi arid region of middle Gujarat

A study was conducted during kharif season of the year 2010-11 to evaluate the effectiveness of okra IDM modules on the basis of infestation level of whiteflies and incidence of yellow vein mosaic virus (YVMV) disease of okra. The IDM module I consisting of periodical uprooting and destruction of infected plants up to 40 days and two sprays of dimethoate (0.03 %); IDM module II comprising destruction of infected plants; first spray with azadirachtin (0.03 %) in the form of neem oil followed by second spray with dimethoate (0.03 %) accompanied by monitoring of whiteflies population by installing of yellow sticky traps @ 10 traps/ha as compared to conventional farmers’ practices. The results indicated that minimum mean whiteflies infestation (1.10) and mean disease incidence (2.29) in IDM module II followed by module I (mean whiteflies infestation 1.98 and mean disease incidence 4.06) as compared to conventional farmers’ practices having higher levels of the same (mean whiteflies infestation 4.89 and mean disease incidence 21.04). Higher mean yield (79.33 q/ha) and cost: benefit ratio (3.02) were also realized in the IDM module II followed by module I (mean yield 61.82 q/ha and cost: benefit ratio 2.54) as compared to farmers’ practice (mean yield 46.05 q/ha and cost: benefit ratio 1.92).