First record of Acrophialophora levis causing wilt of Plumeria in Gurgaon

Authors

  • NARENDRA KUMAR*, DEEPIKA KULSHRESHTHA, SAPNA SHARMA, RASHMI AGGARWAL and S.M. PAUL KHURANA

Keywords:

Acrophialophora levis, collar region mycoflora, Plumeria wilt, rhizoplane, rhizosphere

Abstract

During survey in Gurgaon and its suburbs, white flowered Plumeria acutifolia Poir plants, belonging to apocynaceae family, have been wilting. Frequent surveys showed 10-15% wilting in Gurgaon and wilting incidence was found alarming in IMT Manesar. It caused complete wilting and death of trees one after another in a row. The wilted plants of P. acutifolia were observed in all age groups which showed yellowing of leaves starting from margins, then complete yellowing of old and even young leaves and finally death of the plant in 3-4 years. The samples of wilted and healthy plants (root containing soil, collar regions, shoot) were collected for study of rhizosphere, rhizoplane microflora. Both sterilized and unsterilized pieces of the samples were observed for the growth of bacteria and fungi. In all age group Acrophialophora levis was found present in both sterilized and unsterilized pieces. A. levis was present in rhizosphere, rhizoplane and collar region in all collected wilted plants but it was completely absent in healthy plants. The results of sequence datasets for both ITS1 and 4 (~550 bp) showed a 99% sequence identity to the fungus A. levis. During pathogenicity tests under pot conditions A. levis showed 90% wilting while control set showed no wilting. On basis of wide occurrence and pathogenicity tests A. levis was regarded as causal organism responsible for wilting of frangipani plants at Gurgaon. This is the first record of A. levis causing wilt in this plant.

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Published

2016-12-24

Issue

Vol. 69 No. 4 (2016): Indian Phytopathology

Section

Research Articles

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How to Cite

SAPNA SHARMA, RASHMI AGGARWAL and S.M. PAUL KHURANA, N. K. D. K. (2016). First record of Acrophialophora levis causing wilt of Plumeria in Gurgaon. Indian Phytopathology, 69(4), 400-406. http://epubs.icar.org.in/ejournal/index.php/IPPJ/article/view/66253