Soil applications of sulfureous compounds to control tipburn of head lettuce in the field

Abstract

Different levels of sulfureous compounds were applied to the soil before sowing or four to six weeks after sowing seeds of head lettuce (Lactuca sativa var.capitata L.) in five field plots throughout Arizona during 1979 and 1983. Plants were rated for tipburn incidence at harvest. Tipburn severity values were consistently lower in cultivars, Calmar, Vanguard and Empire and higher in cultivar Green bud in treated plots compared to non-treated plots. However, disease severity ratings in treated and non-treated plots were not significantly different at the 5% level.