Influence of Seed Size on the Performance of Callosobruchus maculatus in Four Cowpea Varieties
Adebayo, R.A. and Ogunleke, O.M.
Full Length Research Paper I Published November,2016
Journal of Agricultural Science and Food Technology
ABSTRACT
There have been reports on the factors influencing the
performance of cowpea seed beetle, Callosobruchus
maculatus (F.). Therefore, experiments were conducted on
four local cowpea varieties (Oloyin, Drum, Sokoto white
small and big) to evaluate the effects of seed size on the
performance of C. maculatus on the varieties. The
study was carried out at the Pest Management Laboratory,
Department of Crop, Soil and Pest Management, Federal
University of Technology Akure, Ondo State, Nigeria. Ten
seeds of the four varieties and two seeds of the varieties
mixed served as the control were infested with 3 pairs of
2days old adult’s C. maculatus in petri dishes
(90x150 mm) and replicated three times. The experiments were
conducted under prevailing laboratory conditions of 28±2°C
temperature and 60±5% relative humidity. Data were collected
on initial weight of seeds, number of eggs laid, number of
seeds with eggs, number of seeds without eggs, number of
emerged adults, number of seeds with holes, number of seeds
without holes, weight loss and percentage damage. Results
indicated that more eggs (41.00) were laid on Sokoto small
variety but had no significant difference (p> 0.05) from the
other varieties. Results also indicated that the highest
number of adult’s C. maculatus (9.00) emerged from
the Drum variety but this was not statistically different
(p> 0.05) from the other varieties. Weight loss (0.41) and
percentage damage (56.67%) were highest in the Sokoto small.
The study showed that the number of eggs laid was not
influenced by the size of the seed but the number of emerged
adults was influenced by the seed size.
Key Words:
Callosobruchus maculatus,
Damage, Influence, Seed size and Weight loss.
- Journal of Agricultural Science and Food Technology (JASFT)
- Journal of Medical and Biological Science Research (JMBSR)
- Journal of Scientific Research and Essays (JSRE)
- Research Journal of Educational Studies and Review (RJESR)
- Journal of Physical Science and Environmental Studies (JPSES)
- Research Journal of Engineering and Technology (RJET)
- Pearl Journal of Management, Social Science and Humanities (PJMSSH)