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respect of its developmental period, fecundity and (Coleoptera :
longevity.
358 BEGUM, S.; NASIM, M. (Dept. of
Zoology, Dhaka University, Dhaka) & The duration of hatching, larval instars and pupal
MAJUMDER, M.Z.R. (Institute of Food and
Radiation Biology, Radiation Entomology and
Acarology Division, Atomic Energy Research
Establishment, Dhaka). Some Biological Aspects
of the Hairly Maggot Blowfly, Chrysomya
rufifacies (Macquart. 1842) (Diptera : Higher temperature significantly reduced the
Calliphoridae). Bang. J. Zool., 2007, 35 (2), 367-
380.
The life cycle of Chrysomya rufifacies from egg to
adult was 10.2 ± 2.39 days at 25 ± 5 °C. The mean
incubation period was 11.6 ± 1.14 hours, and the
mean larval, pre-pupal and pupal periods were 94.6
± 12.82, 52.8 ± 10.73 and 81.6 ± 27.36 hours,
respectively. There were three larval instars, each
larva consisted of 12 segments; the second and
third instar larvae had long tubercles or hairy
th
th
spines from the 4 segment upto to the 12
segment. The pupae were exarate adecticous type.
Mating took place after two days of adult
emergence. Copulation existed from two to nine
minutes. The mean pre-oviposition, oviposition
and post-oviposition periods were 14.8 ± 3.96,
10.2 ± 0.83 and 3.6 ± 1.52 days, respectively. The
female laid only two egg batches, and fecundity
was on an average of 358.4 ± 16.21 eggs per
female. The longevity of the female was longer
than the male. Mated adults lived longer than the
un-mated ones. Percentage of mortality, egg
hatching, adult emergence and mating, and
oviposition preference were also observed.
359 BISWAS, G.C.; ISLAM, W. (Institute of
Biological Sciences, Rajshahi University,
Rajshahi) & HAQUE, M.M. (Dept. of Zoology,
Rajshahi University, Rajshahi). Biology and
Predation of Stethorus punctillum Weise
113
Coccinellidae) Feeding on
Tetranychus urticae koch). J. Bio-Sci., 2007, 15, 1-
5.
stages of Stethorus punctillum feeding on two-
spotted spider mite, Tetranychus urticae were
investigated in different seasons under laboratory
conditions. The highest values ot different
developmental stages were obtained during winter.
duration of different developmental stages. No
significant effect of relative humiity was exerted
on the development stages of S. punctillum. The
predation rate ot fourth instar larva of S. punctillum
was the highest whereas the first instar larva
consumed the lowest number of prey. The fourth
instar larva of the predator consumed 135.8 eggs,
126.4 larvae, 96.6 nymphs and 72.8 adults per day
separately. But the first instar consumed 41 6 eggs,
36.2 larvae, 26.8 nymphs and 16.8 adults during
the same period.
360 FARHANA, K.; ISLAM, H.; EMRAN,
E.H. & ISLAM, N. (Dept. of Zoology, Rajshahi
University, Rajshahi). Toxicity and Repellant
Activity of Three Spice Materials On Tribolium
castaneum (Herbst) Adults. J. Bio-Sci., 2006,
14,131-134.
The chloroform extracts of coriander
(Coriandrum sativum L.), ajowain
(Trachyspermum ammi(L) Link.) and fenugreek
(Trigonella foenum-grecum L.) were tested
against the red flour beetle, Tribolium
castaneum (Hbst.) adults through residual film
assay and their repellent activity were also
conducted. The LD 50 values for coriander,
ajowain and fenugreek were 316.173 and
243.5895, 271.4573 and 232.7095, and 159.0106
2
and 4.194236 ug/cm for 24- and 48 h of
exposure respectively. According to the intensity