Bacterial antagonists are effective as an alternative to synthetic bactericides in the control of potato soft rot. The use bioagents reduces application bactericides, which harmful humans and environment. However, mechanisms some bioagents, such fungi bacteria, not yet understood. This paper reviews current situation rot, biological controls, antagonistic their mechanisms, strategies future dir...

In Belgium, silages are often infected by Penicillium roqueforti sensu lato (s.l.). These 13 toxigenic fungi are well adapted to silage conditions, and their prevention during feed-out is 14 difficult. Bacillus velezensis strain NRRL B-23189 has been reported to inhibit P. roqueforti s.s. 15 conidiospore germination in vitro by the production of lipopeptides. In the present study, the 16 antago...

The antagonistic potential of culture filtrates of a soil isolate of T. viride was evaluated invitro, against three common post-harvest rot pathogens; A. niger, A. flavus, and F. oxysporum. Assay of three extracellular enzymes; chitinase, protease and cellulase, in respective enzyme-induced culture filtrates revealed the presence of enzyme activity. When 10% (v/v) concentration of the various l...

Two greenhouse experiments were conducted to examine the effect of Crotalaria juncea amendment on Meloidogyne incognita population levels and growth of yellow squash (Cucurbita pepo). In the first experiment, four soils with a long history of receiving yard waste compost (YWC+), no-yard-waste compost (YWC-), conventional tillage, or no-tillage treatments were used; in the second experiment, onl...

Paenibacillus sp. strain B2, isolated from the mycorrhizosphere of sorghum colonized by Glomus mosseae, produces an antagonistic factor. This factor has a broad spectrum of activity against gram-positive and gram-negative bacteria and also against fungi. The antagonistic factor was isolated from the bacterial culture medium and purified by cation-exchange, reverse-phase, and size exclusion chro...

The antibiotic activity of 70 isolates belonging to the genera Aspergillus, Penicillium, Fusarium, Alternaria and Trichoderma was tested as preliminary screening. The highest activity was obtained with three Penicillium oxalicum isolates, one Penicillium decumbens isolate and the Trichoderma harzianum isolate. After that, we chose these five isolates in order to carry out other studies with bac...

The bacterium Pseudomonas aureofaciens 63-28 is antagonistic to several plant pathogenic fungi, including Pythium spp. The bacterium produced at least four antifungal metabolites active against Pythium ultimum and Phytophthora cryptogea when tested in culture for antifungal activity. Two of these compounds were identified as the novel butyrolactones (Z)-4-hydroxy-4-methyl-2-(1-hexenyl)-2-buteno...