Suppression of sporulation ofBotrytis spp. as a valid biocontrol strategy |
| |
| Authors: | Jürgen Köhl Wilma M L Molhoek Carin H van der Plas Nyckle J Fokkema |
| |
| Institution: | (1) DLO Research Institute for Plant Protection (IPO-DLO), P.O. Box 9060, 6700 GW Wageningen, The Netherlands |
| |
| Abstract: | In this study, the hypothesis was tested that removal of substrate for sporulation ofBotrytis spp. may lead to a retardation of an epidemic if the majority of the inoculum is produced inside the treated crop. Suppression of sporulation ofBotrytis spp. could be an attractive option for biological control ofBotrytis leaf spot in onions. In a field experiment, necrotic leaf tissue was removed to simulate the effect of a biocontrol agent. By this means, the amount of substrate on whichBotrytis spp. sporulates was reduced. In the experiment, the spore load above the onion plots was significantly reduced and the epidemic of onion leaf spot was retarded. At the end of the growing season, the number of leaf lesions in the green leaf area was lower in plots with substrate removal than in control plots (0.6 and 1.1 cm–2, respectively). The results demonstrated that an epidemic of onion leaf spot largely depends on the rate of inoculum production inside a crop. Thus, suppression of sporulation on necrotic leaf tissue is a valid control strategy that could be applied by using sporulation suppressing antagonists. |
| |
| Keywords: | antagonism biological control Botrytis cinerea Botrytis squamosa Gliocladium roseum onion leaf spot |
| 本文献已被 SpringerLink 等数据库收录！ |
|
