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Study of Antagonistic Capabilities of Trichoderma spp. against Alternaria macrospora Zimm. Causing Leaf Spot in Cotton

B. Prasad,S. Bhattiprolu,V. Kumari,P. Kumar

Published 2018 in International Journal of Current Microbiology and Applied Sciences

ABSTRACT

Alternaria macrospora mainly affects the cotton leaf on which small, dull to dark brown, circular or irregular shaped spots appear, varying in diameter from 0.5 to 10 mm. They often develop concentric ridges with a target board appearance on the upper surface. Mature spots have dry, greyish centers which may crack and drop. The spots coalesce and occupy large areas of the leaf. Watkins (1981) observed dark chains of conidia on the spots. Veins of leaf may also be affected. Spots occur on the cotyledons which are severely affected. Cankers occasionally develop on the stem. In India, circular lesions develop on the bolls resembling those on the leaves. The seeds may get infected and carry the infection (Padaganur, 1979).

PUBLICATION RECORD

  • Publication year

    2018

  • Venue

    International Journal of Current Microbiology and Applied Sciences

  • Publication date

    2018-06-10

  • Fields of study

    Biology, Agricultural and Food Sciences, Environmental Science

  • Identifiers
    DOI 10.20546/IJCMAS.2018.706.136
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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