Indian Journal of Nematology
Year : 1981, Volume : 11, Issue : 1
First page : ( 102) Last page : ( 103)
Print ISSN : 0303-6960.

Disease complex involving Rotylenchulus reniformis and Rhizoctonia solani in okra

Kumar S., Sivakumar C. V.

Tamil Nadu Agricultural University, Coimbatore-641 003.

Presented at Nematology Symposium held at Coimbatore, India in February, 1981

Abstract

Glasshouse studies proved that when the reniform nematode, Ratylenchulus remformis and the fungus Rhizoctonia solani were present, okra plants succumbed to wilt at an early stage and when the nematode infection preceded the fungus, wilt appeared earlier than when the plants were infected first with the fungus. The fungus caused wilt 45–60 days after germination in the absence of the nematode, depending upon the level of inoculum and the age of the plant, while the initial injury by the nematode shortened the period to 34–43 days after germination. When both the pathogens were inoculated at high level 15 days after germination, wiit occurred 23 days after germination. A low initial/nematode inoculam preceiding the fungal inoculam also caused early wilting irrespective of the density of the latter.

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