Comparative study of population densities of fusarium species from cultivated and non-cultivated soils in selected towns of Cavite /
Medwill I. dela Cruz.
- Indang, Cavite, Cavite State University- Main Campus, 2000.
- 42p. : ill. ; 28 cm. illustrations ; cm.
Thesis (BSA - - Crop Protection) Cavite State University.
Includes bibliographical references.
DELA CRUZ, MEDWILL I. Cavite State University Indang, Cavite March 2000. Comparative Study of Population Densities of Fusarium Species From Cultivated and Non-Cultivated Soils in Selected Towns of Cavite. Adviser: Dr. Adelaida E. Sangalang Composite soil samples were collected from cultivated and non-cultivated soils from Alfonso and Tanza to compare the population density of Fusarium species. Fusarium species were isolated using the soil dilution plate technique in peptone PCNB agar, carnation-leaf agar, potato dextrose agar. Out of 91 isolates six species of Fusarium were identified from cultivated and non-cultivated soils. These were Fusarium solani (Mart) Appel & Wollenw, Fusarium oxysporum Schlecht, Fusarium semitectum Berk & Ray., Fusarium proliferatum, (Matsushima) Nirenberg, Fusarium equiseti (Cda) Sacc and Fusarium moniliforme Sheldon. The population densities of all species in cultivated and non-cultivated soils were significantly different. However the frequency of Fusarium isolates showed no significant differences between cultivated and non-cultivated soils. Fusarium solani and F. oxysporum were the two man abundant and frequently isolated in cultivated and non-cultivated soil from Alfonso and Tanza. F.semitectum, F.proliferatum and F.equiseti had lesser population densities. Fusarium monthforme was present only in cultivated soils planted with rice and vegetable from Tanza soil sample. Results indicate that cultivation, soil type, soil moisture, presence of other pathogens, and the inherent characteristics of each species determine the nature and population density of Fusarium species that reside in the soil.