BIOLOGICAL CONTROL OF POWDERY MILDEW DISEASE ON MARIGOLD (Calendula officinalis L.) AT FAYOUM | ||||
| Fayoum Journal of Agricultural Research and Development | ||||
| Article 12, Volume 23, Issue 1, January 2009, Page 151-159 PDF (465.2 K) | ||||
| Document Type: Research articles. | ||||
| DOI: 10.21608/fjard.2009.197022 | ||||
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| Authors | ||||
| M.I. El-Refaei1; T.H. abd El-Moity2; M.M. Mergawy2 | ||||
| 1Botany Department, Faculty of Agriculture, Fayoum University. | ||||
| 2Plant Pathology Institute, Agricultural Research Center. | ||||
| Abstract | ||||
| Marigold (Calendula officinalis L.) is one of the important economically crops, which belongs to family Astraceac. Marigold represents one of the most important and economic ornamental crops in the Arab Republic of Egypt. The economic importance of this crop appears in both local consumption and exportation purposes. Cultivated area of marigold in 2005 growing season reached about 550 Fadden in open fields, which yielded 9397 ton flowers. Several disease attacked marigold plants in all growing stages as powdery mildew. The Present work was designed to solve a part of this dilemma and control this disease by non-chemical methods. The present investigation aimed at studying the effect of bio control agents in controlling marigold powdery mildew. Different microorganisms were isolated from phylloplane of healthy marigold plant and used as antagonists against different pathogens. Trichoderma harziamum and Bacillus subtilis were the most effective antagonists against all tested pathogens as well as increasing the average number of flowers/plant and average weight of flowers/plant One week interval was the best time for using both organisms as antagonists. | ||||
| Keywords | ||||
| Disease; Biological Control; Powdery Mildew; Marigold | ||||
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