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and combination treatment at ambient temperature. (COQUELLETT). (DEPTERA : TEPHRITIDAE).
Total bacterial count of the unfried kebab was 4.2 Bang. J. Zool., 2006, 34 (1), 87-94.
3
x 10 cfu/g. The effect of irradiation doses of 5 and
10 kGy and combination of irradiation and The effects of gamma radiation on the post
ascorbic acid for extending the shelf life of fish embryonic development of melonfly, Bactrocera
kebab were studied at ambient temperature (25 - cucurbitae Coq. (Diplera : Tephritidae) were
30°C) up to 5 weeks. Kebab irradiated at 5 kGy at studied to assess the possibilities of sterile insect
ambient temperature could be stored more than 35 release technique for its practical implementation.
days compared to 12 days for unirradiated sample Radiation had detrimental effects on all the
and 14 days for ascorbic acid treated sample developmental stages of the melonfly. The young
7
considering total bacterial load 10 cfu/g, total eggs were more susceptible to radiation than the
volatile nitrogen 25 mgN/100g and organoleptic old eggs. The length of larval period increased
score 5, as the acceptable limit. Although no upto 1 1 days at 50 Gy radiation. The larvae were
microbial counts were recorded in both untreated more sensitive than the pupae. No adult emerged
and ascorbic acid treated kebab irradiated at 5 and from the pupae irradiated at 20 Gy or more. The
10 kGy up to 35 days but organoleptic criteria was LD 50 values of the larvae were 113.41. 251.85 and
the determining factor. 319.44 Gy for first, second and third instar larvae,
respectively. The LD 50 values for 24, 48, 72, 96
045 KHAN, H.S. & ISLAM, M.S. (Dept. of and 120 hrs old pupae were recorded at the doses
Zoology, Rajshahi University, Rajshahi). EFFICACY of 9.06. 15.61. 52.32. 99.69 and 345.48 Gy.
OF GAMMA RADIATION AGAINST HOUSEFLY respectively.
(MUSCA DOMESTICAL.) REPRODUCTION AND
SURVIVAL II. ADULT TREATMENT. J.Bio-Sci., 047 RAHMAN, M.M. & HUQUE, R.
2006, 14, 25-30. (Institute of Food and Radiation Biology, Atomic
Energy Research Establishment, Dhaka) &
Gamma radiation-induced changes in the BEGUM, M (Dept. of Zoology, Dhaka University,
reproductive parameters have been investigated Dhaka). SOME ASPECTS BIOLOGY OF THE
using 0-10 Gy doses on adult houseflies Musca BEAN BEETLE, CALLOSOBRUCHUS PHASEOLI
domestica L.. Inheritance of the parameters was (GYLLENHAL) (COLEOPTERA : BRUCHIDAE).
recorded in the parents and subsequent progenies Bang. J. Zool., 2007, 35 (2), 311-317.
up to F 3 generations. Compared to the untreated
controls, irradiations significantly increased The biology of the bean beetle. Callosobruchus
oviposition, sterility and immature mortality, and phaseoli (Gyllenhal) (Coleoptera : Bruchidae) was
diminished adult and female eclosion in the treated studied under laboratory condition at 29 ± 1°C and
lines. Sterility reached 100% above 8 Gy levels 65 ± 5% RH using the seeds of Lablab perpureus
and males were readily radiosterilized than the Medik. (syn. Dolichos lablab L.) as normal food.
females. Dose mortality (LD 50) and sterility (LD 50) Incubation period varied from 4-7 days with a total
responses of the test insects were determined to be hatching period of four days. Average hatching
10.04 Gy and 6.23 Gy, respectively. Results are was 74% with a range from 70 to 80%. There were
promising in connection with a sterile insect four larval instars and a pupal stage in the life
nd
st
rd
technique (SIT) for this pest species. cycle of the beetle. The duration of 1 , 2 , 3 and
th
4 instar larvae was 5-7, 5-7. 3-4 and 4-5 days,
046 NAHAR, G. (Institute of Food and respectively. The duration of pupal stage was 5-6
Radiation Biology, Atomic Energy Research days. The total developmental period from egg to
Establishment, Dhaka) & HOWLADER, A.J. adult was 26-36 days. A female on average laid
(Dept. of Zoology, Jahangirnagar University, 59.2 eggs in its lifetime. Oviposition period ranged
Savar, Dhaka). EFFECTS OF RADIATION ON from 1 to 9 days. The longevity of the beetle was
THE POST EMBRYONIC DEVELOPMENT OF found to be dependent on their mating conditions.
MELONFLY, BACTROCERA CUCURBITAE Sex ratio showed female dominance.
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