ALVES, N. M. C.; http://lattes.cnpq.br/9661006374047977; ALVES, Niédja Marizze Cezar.
Abstract:
This work was carried out in order to study the contamination of peanuts by fungi and
mycotoxins throughout the store, in peanut seed treated with different concentrations of
extract of neem and pepper in different packages and evaluate the effect of gamma
irradiation (6 0Co). We used seeds of peanut of cuhivars BRS Havana and BR1. To start
work the cultivars were characterized as for the mycoflora, aflatoxin, moisture content
and germination. The work was conducted in three steps: the first step, we studied the
moisture content, mycoflora and aflatoxin, using a randomized design with the factors:
extract of pepper and neem, concentrations of the extracts, procedure (not inoculated
and inoculated seeds with the fungus) and storage time; the second step, the BR1
cultivar was subjected to the same treatments applied to BRS Havana, evaluated the
mycoflora and germination and determining the moisture content during storage; the
third step, the seeds were subjected to gamma irradiation (6 0Co) where studied the effect
of 8 doses of irradiation on the mycoflora, germination of seeds stored in PET
packaging and braided polyethylene, using a randomized design with the factors: dose
kGy, packaging and storage time. It was concluded that the fungi found in samples of
peanuts from the field and during storage of seeds inoculated and not inoculated were:
A. flavus, A. niger, Penicillium Rhisopus, with predominance of Aspergillus flavus. The
presence of aflatoxin above as permitted by Brazilian legislation for marketing of
peanuts, took place with the seed inoculated with A. flavus treated with neem extract at
the concentration of 70 mL, the dose of 0.5 kGy was effective in the germination of
seeds of peanut, being higher than the control, within 30 and 60 days.
