Abstract
The effect of weather on prevalence of seedling diseases of coconut during 2010-11 and 2011-12 in different areas of Bangladesh was studied to develop an environment friendly disease management practice. Pestalotia palmarum was isolated and identified from leaf having spot. Incidence and severity of grey leaf spot at seedling stage were determined and significant variations were observed depending on weather factors as well as locations. Occurrence of seedling disease was significantly influenced by temperature, rainfall and relative humidity. Comparative effectiveness of BAU-Biofungicide either alone or in combination with two fungicides viz. Bavistin or Dithane M-45 was evaluated on coconut seedling in the nursery. Among the treatments applied, Trichoderma harzianum based BAU-Biofungicide either alone or in combination with Bavistin (0.2%) as an excellent biocontrol means in controlling leaf spot disease of coconut. DOI: http://dx.doi.org/10.3329/jbau.v11i2.19894 J. Bangladesh Agril. Univ. 11(2): 199-208, 2013
Highlights
Coconut (Coccos nucifera ) is one of the most important fruits in Bangladesh
The leaf spot causal pathogen was identified as Pestalotia palmarum
Highest incidence of leaf spot (77.90 %) was recorded in untreated control and the lowest incidence (42.00 %) was recorded when BAU-Biofungicide was applied in soil @ 2 % as well as foliar spray (2 %) that resulted the highest reduction of disease incidence by 46.08 % over control
Summary
Coconut (Coccos nucifera ) is one of the most important fruits in Bangladesh. It provides coconut oil, coconut milk as well as mineral enriched water that widely used in the country. This experiment was, undertaken to investigate the effects of temperature, rainfall and humidity on the leaf spot disease of coconut in Jessore, Jhenaidah and Faridpur and to suggest an eco-friendly management package for the disease.
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