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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. |