|
Life table
parameters of the dubas bug, Ommatissus lybicus (Hem:
Tropiduchidae) at three constant temperatures
A. Payandeh* and A. Dehghan
Department of Plant Protection, Faculty of Agriculture, Bam
Branch, Islamic Azad University, Bam, Iran.
*Corresponding author. E-mail:
apayandeh185@yahoo.com. Tel: 00983442511850. Fax:
00983442510632.
Accepted 4 November, 2011 |
|
The dubas bug, Ommatissus lybicus Bergevin (Hemiptera:
Tropiduchidae) is one of the major pests of date palm in Bam
region, Iran. In this
study,
life table parameters of O. lybicus were studied at
25, 30 and 35°C. The experiments were conducted in a leaf
cage at 60 ± 5% RH and a photoperiod of 16:8 (L: D) h. The
survival rate ( ) of individuals developed to adults
from the initial cohort stages was estimated 0.78, 0.84 and
0.43 at 25, 30 and 35°C, respectively. The longest and
shortest life expectancy ( ) of the pest was 91.9 and 62.5 days
at 25 and 35°C, respectively at the beginning of life. These
results indicate that 30°C could be the optimum temperature
for the biological activities of O. lybicus.
Key words:
Ommatissus lybicus,
Bam, life table, temperature. |
