Management of Sclerotium rolfsii with integration of non-conventional chemicals, vermicompost and Pseudomonas syringae

Abstract

Two non-conventional chemicals, ZnSO 4 (10 À4 mM) and oxalic acid (4 mM) were tested (alone as well as in combination with seeds bacterized with Pseudomonas syringae strain PUR46 and vermicompost substitution in the potting soil), for their ability to suppress collar rot of chickpea (Cicer arietinum) caused by Sclerotium rolfsii under greenhouse conditions. ZnSO 4 and oxalic acid were applied as pre-inoculation foliar spray on chickpea and subsequently challenged with S. rolfsii. Both the chemicals provided significant protection to chickpea compared to control (100% plant mortality) when used alone as well as in combination with PUR46 and vermicompost. However, ZnSO 4 was more effective than oxalic acid against S. rolfsii. Amongst the treatments tried, plant mortality was least when ZnSO 4 was used in combination with seed bacterization with PUR46 and 25% vermicompost substitution. The findings indicate the utility of integration of the above factors in managing collar rot efficiently.

Improved Growth and Nutrition of Sorghum (Sorghum bicolor) Plants in a Low-Fertility Calcareous Soil Treated with Plant Growth–Promoting Rhizobacteria and Fe-EDTA

“…This increase could be related to the rule of Fe-EDTA in promoting plant growth and subsequently P content. Previous work by Egamberdiyeva (2007) using Bacillus and Pseudomonas on maize, Sahni et al (2008) with the use of Pseudomonas syringae on chickpea, and Fernandez et al (2007) using solubilizing PGPR on soybean, found similar responses. The increase of K content due to the use of these PGPR is the result of biomass increase of plants.…”

Potentials of potassium humate, ammonium humate, and vermicompost tea in controlling root-knot nematode, Meloidogyne arenaria and improving biochemical components in eggplant

“…Vermicompost promotes plant growth, enhances germination and increases yield in various vegetables, field crops, and ornamentals as well as, it is a sustainable source of macro, and micronutrients and has extensive potentials for enhanced plant growth when used as soil components (Sahni et al, 2008).…”

The Use of Vermicompost Products to Control Plant Diseases and Pests

“…Recently, Sahni et al (2008) have compared the suppression effectiveness of two different approaches, in which two nonconventional chemicals ZnSO 4 and oxalic acid and the bio-control agent Pseudomonas syringae were applied as foliar sprays and seed coating, respectively, with the combination of vermicompost substitution in the potting soil against collar rot of chickpea caused by Sclerotium rolfsii. Vermicompost substitutions provided significant reduction in mortality of chickpea compared to control, but the suppression was more effective with treatments in which preinoculation with the nonconventional chemicals as foliar sprays were applied against the pathogen.…”