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of activity the toxicity were found in the order of
fenugreek> ajowain >coriander, while the
repellent activities were in the order of
fenugreek> coriander> ajowain.
361 HUQ, M.I. (Plant Pathology Division,
RARS, Barisal) & KHAN, A.Z.M.N. (Dept. of
Botany, Dhaka University, Dhaka). Efficacy in-
vivo of Different Fungicides in Controlling
Stemphylium Blight of Lentil During 1998-2001.
Bang. J. Sci. Ind. Res., 2007, 42 (1), 89-96.
In an experiment with seven different fungicides
such as Rovral 50WP @ 0.2 %, Dithane M-45 @
0.2 %, Tilt 250EC @ 0.05 %, Cupravit @ 0.3 %,
Macuprax @ 0.25 %, Ridomil MZ-72 @ 0.2 % and
Bavistin 50WP @ 0.15 % were tested in the field
during 1998-2001 to control Stemphylium blight
lentil. Among the fungicides Rovral 50WP @ 0.2
% was noted as the most effective fungicide
followed by Dithane M-45 @ 0.2 % and Tilt
250EC @ 0.05 %.
362 HUSAIN, M. M. & HASAN, M.R. (BCSIR
Laboratories, Rajshahi). Efficacy of Malathion in
controlling Tribolium Castaneum Herbst
(Coleoptera: Tenebrionidae). Bang. J. Sci. Ind.
Res., 2006, 41 (3 & 4), 239-244.
Effect of malathion on treated food medium was
studied on adult and 1st, 2nd and 3rd instar larvae
of Tribolium castaneum. The LD 50 for the instars
was 228.22, 78.13 and 183.01 ppm, respectively.
The rate of mortality increased with increasing
concentrations. Toxicity probably depended on the
ingestion of the treated food medium.
363 HUSAIN, M.M. & RAHMAN, M.M.
(BCSIR Laboratories, Rajshahi). Repellent Effect
of Indigenous Plant Bhat (Clerodendron Viscosum
L.). Leaf on Tribolium Castaneum Herbst. Bang. J.
Sci. Ind. Res., 2006, 41(1 & 2), 67-72.
114
Repellent response of Bhat (Clerodendron
viscosum L) to adult and larvae of Tribolium
custaneum was studied. Results indicated that both
the adults and larvae were repelled by contact with
food medium treated with Bhat leaf dust
conditioned with 100, 500, 1000 and 2000 ppm of
flour.
364 ISLAM, F. (Dept. of Zoology, Dhaka
University, Dhaka). Factors Influencing Infestation
of Rice Grains by Sitophilus oryzae (Linnaeus)
(Coleoptera : Curculionidae). Bang. J. Zool., 2007,
35 (1), 161-169.
Influence of certain factors, such as grain variety,
grain size, moisture content and parboiling process
on the infestation of rice weevil, Sitophilus oryzae
(L.), was studied in the laboratory. The badly
damaged or broken grains were preferred for
feeding and those were deeply excavated by
the adults. The grubs usually pupated towards
the lower portion of the grains. Among the
seven rice varieties tested (viz. Kalijira.
Kataribhog, Pajam, Nizersail, Pariza, Minicate
and Latisail), Kalijira was the smallest and
Minicate was largest in length, while Latisail
occupied the heaviest position in size
category. There was no evidence of the
preference of the weevils for a particular grain
size of any of the varieties. The moisture
content of the Pariza was the highest
(12.51%), but it didn't exhibit higher
susceptibility. However, the parboiled grains
were found to be more susceptible compared
to the unparboiled grains. Parboiling process
rendered a variety more susceptible to
infestation by affecting its natural resistance.
365 KARIM, K.N.S. (Dept. of Zoology,
Rajshahi College, Rajshahi) & RAHMAN, M.M.
(BCSIR Laboratories, Rajshahi). Efficacy of some