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Impact of certain corn
cultivars on some ological parameters of Rhopalosiphum
maidis (Fitch) tera: Aphididae)
Erol Bayhan
Department
of Plant Protection, Agricultural Faculty, Dicle University,
Diyarbakır-Turkey. E-mail:
erolbayhan@gmail.com.
Accepted
30 January, 2009 |
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The development, survival rate, reproduction and biological
parameters of the corn leaf aphid, Rhopalosiphum maidis
(Fitch), on five corn cultivars were evaluated at 25°C under
laboratory conditions. The corn leaf aphid had a longer
nymphal developmental time of 4.99, 4.98, 4.73, 4.46, and
5.60 day of Ada9516, K. Arifiye, PrimerG626, Pegaso and
TTM815, respectively. The corn leaf aphid reared on K.
Arifiye had the highest fecundity (69.65 offspring/aphid).
The lower percentage survival rates were observed on TTM815
than that of the others. Net reproductive rate (Ro)
was lowest (67.35 offspring/aphid/generation) on TTM815. The
intrinsic rate of increase (rm) was lower on
TTM815 than that of the other corn cultivars. TTM815 showed
resistance to the pest.
Key
words:
Rhopalosiphum maidis, biological parameters, corn
cultivars. |
