Determination of Fungal Agents in Some Vegetables Seeds in Greenhouse Production Areas in U?ak Province

摘要

Healthy seeds are highly important in greenhouse vegetable growing in order to enhance the yield per unit area and get quality crops. Therefore, it is necessary to detect various disease factors transported with seeds and management with these factors. Fungi are also one of the significant factor groups which can be transported with seeds and cause economic crop losses in greenhouse vegetable growing fields. This study was conducted under in-vitro conditions in August and October in 2016 in order to detect fungal pathogens in some vegetable seeds (okra, eggplant, tomato, pepper, cucumber, bean, cowpea, etc.) in greenhouse vegetable growing fields in Usak province. For this purpose, naturally infected vegetable seeds were obtained from the fruits of vegetables of the previous year collected by farmers from the cultivation fields. Techniques of DFB (deep-freezing blotter) and AP (agar plate) methods suggested by International Seed Test Association (ISTA, 1996; Mathur and Kongsdal, 2003; Al-Askar et.al., 2014) were used in identifying the seed borne fungal flora. Aspergillus niger , Penicillium spp., Rhizoctonia sp., Phytophthora spp., Fusarium sp. Alternaria sp., Curvularia sp., Cylindrocarpon sp., Cladosporium sp., Epicoccum sp. Botrytis cinerea , Mucor sp., Macrophomina phaseolina and Rhizopus stolonifer agents were identified in vegetable seeds in general.