Efficiency of green manures for Cercospora leaf spot management in coffee plants

Abstract

The use of Mucuna aterrima, Dolichos lab lab, Crotalaria mucronata, Arachis hypogaea, Mucuna deeringiana, C. spectabilis, and C. breviflora, intercropped with coffee plants, was evaluated as green manures in the management of Cercospora coffeicola under field conditions in Carlópolis and Jacarezinho counties in the state of Paraná in the crop seasons of 2008/2009 and 2009/2010. The main plot was comprised by treatments with green manures and urea, whereas subplots by the application or not of the poultry litter. There were two controls without green manure and urea: one with and another one without application of Beauveria bassiana, which was used to control Hypothenemus hampei. Similar founds were obtained at both municipalities. The percentage of diseased leaves (DL) was lower for most of the green manures and urea treatments. However, all the treatments reduced the DL in 2009/2010. Although A. hypogaea did not differ statistically from the controls in most of the experiments, the number of lesions per leaf was lower in the other treatments. Similarly, the percentage of healthy coffee berries was higher in the treatments than the controls in most of the experiments in both years. In general, there was no synergistic effect between green manures and urea with the poultry litter, and the efficiency of most green manures was similar to urea in the management of Cercospora leaf spot.

Culture Media Options for Growth and Morphological Characterisation of Cercospora coffeicola Affecting Coffee in Zimbabwe

“…Under field conditions, Cercospora leaf spot is managed by routine copper based fungicide sprays; a contact fungicide which requires routine sprays which may lead to copper toxicity [18][19][20] . Several management tactics have been employed to manage the disease which include growing coffee under shade, fertilisation of coffee [21] , green manuring in combination with urea treatment [22] , were also found to be important in reducing the effects of the disease.…”

Phialomyces Macrosporus Reduces Cercospora Coffeicola Survival on Symptomatic Coffee Leaves

“…Transnordestina, s/n -44.036-900 -Feira de Santana -BA -lgusmao.uefs@gmail.com 10 Department of Plant Pathology and Environmental Microbiology -Pennsylvania State University -University Park, PA 16802 Estados Unidos da América. samueljmt@yahoo.com.br Although effective fungicide-based alternatives are available for the disease management (Patricio et al, 2008), it should not be the exclusive tool but part of the integrated brown eye spot management such as plant nutrition (Cardoso et al, 2013) and biological control (Sirinunta and Akarapsan, 2015).…”