Torres, Princess B. <br/><br/>
Bio-Efficacy of Various Extracts Against the Morphologically Identified Fungal Leaf Diseases of Tamarind (Tamarindus indica Linn.)  [manuscript] / 
Princess B. Torres. 
 - Magalang, Pampanga :  Pampanga State Agricultural University,  2020. 
 - xiv, 86 leaves + CD ;  28 cm. 
<br/><br/> The study was carried out to morphologically identify some phytopathogenic fungi of tamarind through microscopic examination and to assess the inhibitory antifungal potentials of Trichoderma harzianum, Euphorbia hirta leaf extract, carrageenan, and oriental herbal nutrient using Kirby-Bauer Test and Dual Culture Assay. Morphological identification of the phytopathogenic fungi revealed that the Cercospora spp. causes the leaf spot disease, while Oidium spp. and the Alternaria spp. are the causal organisms of powdery mildew and sooty mold, respectively. The findings from the Kirby-Bauer Test revealed that the Trichoderma harzianum exhibited a strong antifungal activities against Cercospora spp. (20 mm), Oidium spp. (36.875 mm), and Alternaria spp. (42.5 mm) by showing zones of inhibition greater than 17 mm (strong inhibitory activity. Furthermore, results from the Dual Culture Assay indicates that the T. harxianum inhibited the Cercospora spp. at 40.39%, and the Oidium spp. and Alternaria spp. having 44.30% and 68.44%, respectively. The T. harzianum is consistently and significantly effective as bio-control agent against Cercospora spp., Oidium spp., and Alternaria spp. when compared to the rest of the treatments (showing no inhibitory activity).