International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 7, Issue:6, June, 2018

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : /
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(6): 1146-1154

Study of Antagonistic Capabilities of Trichoderma spp. against Alternaria macrospora Zimm. Causing Leaf Spot in Cotton
B. Mohan Venkata Siva Prasad1, S.L. Bhattiprolu2, V. Prasanna Kumari1 and P. Anil Kumar1
1Department of Plant Pathology, Bapatla – 522 101, Andhra Pradesh, India
2Regional Agricultural Research Station, Lam, Guntur – 522 034, Andhra Pradesh, India
*Corresponding author

Biological agents provide economical and relatively non-polluting delivery systems for protective materials compared to other chemical methods and biocontrol measures against plant pathogens are widely recognised as a step towards ecofriendly farming. The present investigation carried out to know the interactions of Trichoderma spp. with Alternaria macrospora causing leaf spot of cotton. All the Trichoderma spp. significantly inhibited the growth of A. macrospora in vitro in dual culture experiments. Among the four Trichoderma strains evaluated, T. harzianum strain 3 inhibited the growth (45.29%) at 5 DAI (days after inoculation) with radial growth (0.93 cm). T. harzianum strain 1 isolate was the best isolate among the isolates tested as it grows faster and overlaps on the test pathogen. Interactions with all the Trichoderma strains in dual cultures revealed lysis of A. macrospora with evidence of protoplast aggregation, wrinkling of mycelium and germination of Trichoderma conidia on Alternaria mycelia. Thus Trichoderma is promising bioagent which can be explored in the IDM of Alternaria leaf spot of cotton.

Keywords: Alternaria macrospora, Cotton leaf spot, Trichoderma spp

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How to cite this article:

Mohan Venkata Siva Prasad, B., S.L. Bhattiprolu, V. Prasanna Kumari and Anil Kumar, P. 2018. Study of Antagonistic Capabilities of Trichoderma spp. against Alternaria macrospora Zimm. Causing Leaf Spot in Cotton.Int.J.Curr.Microbiol.App.Sci. 7(6): 1146-1154. doi:
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