An experiment was conducted to assess the effect of four sowing media (ground granite, sharp river sand, top soil and saw dust) on the incidence of damping-off disease in two pine species, Pinus caribaea and Pinus oocarpa during the wet and dry seasons of 2006/07. The experiment was laid out in a completely randomised design (CRD) replicated three times. A significant effect (P<0.05) was observed as top soil recorded the highest disease incidence in both species. There was no significant effect (P>0.05) between the ground granite and sharp river sand. Saw dust had 0% disease incidence and supported the highest plant height. Fusarium oxysporum was implicated as the causal agent of the disease. There was an inter-seasonal variation in

A nursery experiment on pre-and post-emergence damping off of Chrysophyllum species was conducted in the

The incidence of the damping-off disease of two timber species Terminalia ivorensis and Nauclea diderrichii sown in ground granite, sharp river sand, topsoil and sawdust was assessed at the nursery site of the Department of Forestry and Wildlife Management, University of Port Harcourt. The experiment was laid out in a completely randomised design replicated three times. Fusarium oxysporum was implicated as the causal agent of the disease. Terminalia ivorensis was not susceptible to Fusarium damping-off in the study. A significant effect (P<0.05) was observed in top soil which recorded the highest disease incidence in Nauclea diderrichii. Saw dust showed 0% disease incidence and supported the highest plant growth in both

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An investigation was carried out on the effect of spent mushroom substrateon the wilt disease of tomato when the spent substrate is used as soilamendment. The experiment was carried out at the teaching and researchFarm of the Faculty of Agriculture and the Mycology/Plant Pathology Laboratoryof the Department of Plant Science and Biotechnology, University ofPort Harcourt. Two tomato varieties tropimech (TT 3) and tomate U82B(TT2)at 4 Ã¢â‚¬Â6wks old stage were transplanted into potted soil amended with spentmushroom substrate at the ratio 1:3, 1:4, 1:5 and 1:6 in plastic pots. Stemdiameter, plant height, number of leaves, disease incidence and disease severitywere evaluated. Fusarium oxysporum was implicated as the causalagent of the disease; Aspergillus sp and Rhizopus sp were also isolated fromthe soil though not pathogenic to the plants. The ratio 1:4 was observed tohave the most positive effect on the disease, while the ratio 1:5 had the leasteffect on the disease.