Abstract

The host range of M. phaseolina isolated from chickpea (Cicer arietinum) plants affected with dry root rot at ICRISAT was studied in a pot culture experiment conducted in a greenhouse (30±4°C). Seeds of 46 plant species were sown in 20 cm plastic pots containing 10% (w/w) fungus inoculum multiplied on 1% peptone-treated chickpea stem pieces and black soil mixture. Of the 44 that showed infection, 11 were new hosts: Celosia argentea, Corchorus trilocularis, Cyanotis axillaris, Dactyloctenium aegyptium, Digera muricata. Digitaria ciliaris, Echinochloa colonum, Eclipta prostrata, Indigofera glandulosa, Trianthema portulacastrum and Tridax procumbens. In addition, 10 species were found to be new pycnidial hosts: Abelmoschus esculentus, Capsicum frutescens, Carthamus tinctorius, Cyamopsis tetragonoloba, Dolichos biliflorus, Lagenaria leucantha, Lens culinaris, Phaseolus mungo, Pisum arvense and Tridax procumbens. It is concluded that as all the commonly cultivated crops in the semiarid tropics where M. phaseolina is prevalent were found to he hosts, crop rotations may be of value in its management

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