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Disease Note.

Additions to the Host Range of Macrophomina phaseolina. S. K. Singh, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru P.O., Andhra Pradesh 502324, India. Y. L. Nene, and M. V. Reddy. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru P.O., Andhra Pradesh 502324, India. Plant Dis. 74:828. Accepted for publication 24 April 1990. Copyright 1990 The American Phytopathological Society. DOI: 10.1094/PD-74-0828F.

The host range of Macrophomina phaseolina (Tassi) Goid. isolated from chickpea (Cicer arietinum L.) 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 I % peptone-treated chickpea stem pieces and black soil mixture. Of the 44 that showed infection, II were new hosts (1): Celosia argentea L., Corchorus trilocularis L., Cyanotis axillaris (L.) D. Don., Dactyloctenium aegyptium (L.) Willd., Digera muricata (L.) Mart., Digilaria ciliaris (Retz.) Koeler, Echinochloa colonum (L.) Link, Eclipta prostrata (L.) L., Indigo/era glandulosa Willd., Trianthema portulacastrum L., and Tridax procumbens L. In addition, 10 species were found to be new pycnidial hosts: Abelmoschus esculentus (L.) Moench, Capsicum frutescens L., Carthamus tinctorius L., Cyamopsis tetragonoloba (L.) Taub., Dolichos bilflorus Roxb., Lagenaria leucantha Rusby, Lens culinaris Medik., Phaseolus mungo Linn., Pisum arvense (L.) Poiret, and Tridax procumbens. Because all the commonly cultivated crops in the semiarid tropics where M. phaseolina is prevalent were found to be hosts, crop rotations may not be of value in its management.

Reference: (1) A. Ghaffar et al. Pak. J. Sci. Ind. Res. 7:71, 1964.