Management of leaf blight of Chrysanthemum with compost teas

  • K Praveena Deepthi Department of Plant Pathology, College of Agriculture, Rajendranagar, Hyderabad, Andhra Pradesh- 534 450
  • P Narayan Reddy Department of Plant Pathology, College of Agriculture, Rajendranagar, Hyderabad, Andhra Pradesh- 534 450
Keywords: Alternaria alternata, Leaf blight, Chrysanthemum, Compost teas, Control, Management

Abstract

Chrysanthemum (Chrysanthemum morifolium Ramil) is an important flower crop, being affected by leaf blight caused by Alternaria alternata (Fries) Keissler, a serious disease affecting the flower yield. The present studies were carried out to derive a management strategy with compost teas. The compost teas Vermicompost (CT-1), Vermicompost + Pseudomonas fluorescens1% (CT-2), Vermicompost  + Trichoderma viride1% (CT-3), Dung75% + Paddy Straw25% (CT-4), Dung75% + Paddy Straw25% + Pseudomonas fluorescens1% (CT-5), Dung75% + Paddy Straw25% +Trichoderma viride1% (CT-6), Dung75% + Neem Powder20% + Fish meal5% (CT-7), Dung75% + Neem Powder20% + Fish meal5% + Pseudomonas fluorescens1% (CT-8) and Dung75% + Neem Powder20% + Fish meal5% + Trichoderma viride1% (CT-9) were tested against the mycelia growth  and spore germination of pathogen, and against disease under field conditions. Compost teas that were sterilized by filtration were prefixed with S where ever necessary. Compost teas were effective in inhibiting the mycelia growth and spore germination. In single spray treatment the percent disease index varied from 9% (CT-8) to 21.34% (CT-4), in two spray treatments 8.69% (SCT-6) to 13.34% (CT-7) and in 3 sprays treatment 4.67% (CT-6) to 11.2% (SCT-1). Treatments CT-6 (4.67%), SCT-5 (4.75%) SCT-6 (6.45%), SCT-7 (5.85%) was superior to fungicide Iprodione 25% + Carbendazim 25%. The treatment CT-6 was most effective to increase the flower yield.

DOI: http://dx.doi.org/10.3329/sja.v12i1.21112

SAARC J. Agri., 12(1): 48-61 (2014)

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Abstract
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Published
2014-12-03
How to Cite
Deepthi, K., & Reddy, P. (2014). Management of leaf blight of Chrysanthemum with compost teas. SAARC Journal of Agriculture, 12(1), 48-61. https://doi.org/10.3329/sja.v12i1.21112
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Articles