Dissertação
Caracterização fitossanitária e potencial germinativo de sementes de Eugenia uniflora L.
Fecha
2014-02-25Registro en:
DORNELES, Daniele Urrutia. PHYTOSANITARY CHARACTERIZATION AND GERMINATIVE POTENTIAL OF Eugenia uniflora L. SEEDS. 2014. 84 f. Dissertação (Mestrado em Recursos Florestais e Engenharia Florestal) - Universidade Federal de Santa Maria, Santa Maria, 2014.
Autor
Dorneles, Daniele Urrutia
Institución
Resumen
Eugenia uniflora L. (pitangueira) is a native fruit species in Brazil, with wide
geographical distribution, has economic potential because its fruit marketed, can be
recommended for planting in heterogeneous reforestation for the recovery of
degraded areas and permanent preservation to be attractive to wildlife. The present
study aimed to identify the species of insects associated with seed, assess the
damage caused by insect predators, its consequences on viability and occurrence of
fungi on seeds of Eugenia uniflora. The samples were collected in FEPAGRO
located in Santa Maria, RS. The seeds were evaluated for the occurrence of posture,
punching, number of insects per seed (conditioned in individual containers),
percentage of predation and substrate consumption. Moreover, germination test was
performed to evaluate the influence of predation on seed viability, the occurrence of
insects that occasion and identification of fungal genera that occur in the seeds.
Emerged from seeds two species of insects, Atractomerus pitangae (Marshall, 1925)
(Coleoptera:Curculionidae) and a new species of Paracrias sp. nov.
(Hymenoptera:Eulophidae), parasitoid larvae of Curculionidae. Atractomerus
pitangae and Paracrias sp. nov. are found associated with the seeds of Eugenia
uniflora. The occurrence of A. pitangae tends to increase at advanced stages of
maturation. The insects cause damage to seeds that attack, but the number of
predated seeds is not expressive. There is a decrease in the percentage of normal
seedlings as the frequency rises insects. The presence of insects is higher at the end
of the fruiting period. The insects have a higher occurrence in the advanced stages of
maturation. The most common fungal genera are Penicillium sp., Fusarium sp.,
Alternaria sp. and Aspergillus sp. and vary depending on fruit maturation.