The antifungal activity of ethanol and acetone extract of leaves of nine medicinal plants: Piper betel, Lowsonia inermis, Psidium guajava, Carica papaya, Moringa oleifera, Mimosa pudica, Catharanthus roseus, Adhatoda vasica and Andrographis paniculata against Fusarium oxysporum the causal agent of Fusarium wilt in tomato was assessed. All the extracts inhibited mycellial growth at various levels. Among them the superior inhibition (100%) was found in 15% concentration of ethanol extract of Lowsonia inermis and Psidium guajava against Fusarium. In all plant extract there were no significant differences between 20% and 25% concentration, except Piper betel, Carica papaya, Andrographis paniculata and Lawsonia inermis. Analysis of variance results on mycelial growth in different concentration shows that the item was highly significant.

Five pathogenic fungi viz., Alternaria alternata (Fr.) Keissler, Curvularia lunata (Wakker) Boedijn, Drechslera oryzae Breda de Haan (Subramanian and Jain), Fusarium moniliforme Sheldon and Pestalotiopsis guepinii (Desm.) Stay. were isolated from two rice varieties viz., BRRI 29 (Boro) and Pajam (Aman) by Blotter and Tissue planting methods. Ten fungicides i.e. Bavistin 50 WP, Salcox 50 WP, Dithane M-45, Indofil M-45, Tall 25 EC, Ridomil MZ Gold, MC Sulphur 80, Greengel, Hayvit 80 WP and Capvit 50 WP at 100, 200, 300, 400 and 500 ppm were evaluated against the above mentioned five pathogenic fungi. Tall 25 EC completely inhibited the radial growth of the test fungi at all the concentrations except Fusarium moniliforme. Antifungal properties of ethanol extract of Artocarpus heterophyllus Lamk., Tagetes erecta L., Datura metel L., Senna alata (L.) Roxb., Azadirachta indica A. Juss., Citrus medica L., Mangifera indica L., Asparagus racemosus Willd., Nerium indicum Mill. and Allium sativum L. at 5, 10 and 20% concentrations were evaluated against the five test pathogens. All the plant extracts completely inhibited the radial growth of the test fungi at 20% concentration except Asparagus racemosus.

A total of 17 species of fungi representing 11 genera were found to be associated with Houttuynia cordata Thunb. The isolated fungi were Aspergillus flavus Link, Aspergillus niger Van Tiegh., Cercospora houtttuyniicola Goh et Hsieh, Colletotrichum coffeanum Noack, Colletotrichum dematium (Pers. Ex Fr.) Grove, Colletotrichum gloeosporioides (Penz.) Sacc., Curvularia brachyspora Boedijn., Curvularia fallax Boedijn., Curvularia pallescens Boedijn., Fusarium sp., Nigrospora sacchari (Speg.) Mason., Penicillium sp., Pestalotiopsis spp., Syncephalastrum sp., Trichoderma viride Pers. Ex Fries. and a member of Zygomycetes. Cercospora houtttuyniicola is a new record for Bangladesh. All the isolated fungi were tested for pathogenicity.

Seven types of symptom were recorded in four varieties such as CB3, CB9, Hill cotton 1 (HC-1) and 2 (HC-2) of cotton (Gossypium hirsutum L.) during July, 2005 to June, 2008. The symptoms were Anthracnose, Alternnaria leaf spot, Boll rot, Cercospora leaf spot, Rust, Sclerotium rot and Wilting. Present study revealed that association of 30 species of fungi which belonged to 21 genera such as one one in Zygomycetes, one in Ascomycetes, one in Basidiomycetes, 18 in Deutermycetes and one in sterile fungus. The isolated fungi were Alternaria alternata (Fr

not available Dhaka Univ. J. Biol. Sci. 25(2): 195-199, 2016 (July)