EFFECT OF INSECTICIDES ON CORN SEED STORABILITY

ROZANE CUNHA COELHO ODETTE H.T. LIBERAL MARIA LEONOR R. ARRUDA GLÓRIA MARTA B. FERNANDES

 

. After application of four insecticides used in two doses, com Zea
mays L. seed were conditioned in two kinds of containers and stored in two
environments. Germination tests and infestation by Sitophilus oryzae L. (Col.:
Curculionidae) were conducted monthly from each treatment. Com seeds of the
Synthetic cultivar IPEACS II (With 95% germination; 10,73% moisture content and
0% seed infestation) were treated with contact insecticides (Malagran and Sevin)
and fumigants (Phostoxin and Methyl Bromide) in normal dose (as indicated by the
container label) and double dose. After the treatment, seed samples were put into
open and tight cans and stored in dry chamber (22°C and 77% R.H.). Monthly, a
sample from each treatment, were submmited to the germination test and seed
infestation percentage, during 8 and 9 months, respectively. All treatments were
superior to the control, being the most efficient the Malagran, followed by Sevin,
Methyl Bromide and Phostoxin. When the seeds were stored in open environment
and/or conditioned in open can those contrasts were more evidents. The best
results where those from tight cans whatever the storage environment. There was
no effect from doses.



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