Abstract:
Longevity, survivorship, and fecundity of
Trissolcusbasalis
Wholaston were studied on
sunn pest eggs at 17.5, 20, 25, 27, 30 and 35 ̊C (al
l ±0.5), 60±5%
RH and 16:8 h L:D. The
preliminary results revealed an effect of temperatu
re on the mentioned traits. In general,
longevity decreased as temperature increased and ra
nged from 53.28±5.9 to 10.68±1.13
days when temperature leveled up from 17.5 to 35ºC.
Similarly, the highest and lowest
fecundity was observed at 25 and 35 ̊C (292.40±11.14
and 42.16±8.62 eggs female
-1
),
respectively. Moreover, the developmental rate of a
dult parasitoids (1/median longevity)
was well described by modified model of Sharp-DeMic
hele in the range of studied
temperatures and it was used to calculate physiolog
ical age. Likewise, the relationship
between temperature and total realized fecundity wa
s fitted well to a quadratic
polynomial function. Conspicuously, age-specific cu
mulative fecundity rate was highly
coordinated with exponential model and adult surviv
orship was fitted well to the reversed
logistic curve. Finally, three temperature-dependen
t attributes
viz.,
total fecundity, age-
specific cumulative fecundity rate, and age-specifi
c survivorship rate were used for
T.
basalis
oviposition modeling. These findings may contribute
to better understanding of
oviposition strategy and behavior of
T. basalis
.
Keywords:
Oviposition model, Physiological age, Survival, Tem
perature,
Trissolcus basalis.
