Occurrence of fungi in rubber seeds

Abstract

The area under the rubber crop (Hevea brasiliensis (Willd ex-A. Juss.) Muell. Arg.) in Brazil has increased greatly in recent years and its multiplication is done through drafting clones and seeds. This work was carried out because the rubber crop is very important in the country and the bibliographical references to seed-borne fungi diseases is very limited. The rubber seed samples from Pará and Bahia states, in January to June of 1981, were examined in January to June 1981 at the Plant Pathology Laboratory of the National Center of Genetic Resources - CENARGEN. All of them underwent the following tests: blotter test, agar test, both with two kinds of lights: ultraviolet and fluorescent, and the direct examination test. Among many of fungi observed in the rubber seed are known as pathogens of rubber crop, such as: Colletotrichum gloeosporioides (Penz) Sacc, Phytophthora sp., Botryodiplodia sp, Phomopsis heveae (Petch) Boedijn, Dothiorella gregaria Sacc., Phyllosticta heveae Zimm., Alternaria sp. The raprophyte fungi which were most detected were Fumago sp. and Aspergillus spp.