Abstract 19(1)

Bangladesh j. entomol. (2008) 19(1), 1-8

EFFECTS OF CAFFEINE AND CASTOR OIL ON THE GROWTH OF TRIBOLIUM CASTANEUM HERBST (COLEOPTERA: TENEBRIONIDAE)

N. AKHTAR & K. A. M. S. H. MANDAL

Institute of Biological Sciences,

Rajshahi University, Rajshahi-6205, Bangladesh

ABSTRACT

The growth of Tribolium castaneum Herbst in caffeine and castor oil treated food media was studied. All the chemical treatments significantly (P<0.01) reduced larval, pupal and adult weight in comparison with those of control. Caffeine significantly (P<0.01) lengthened both larval and pupal periods. Castor oil also significantly (P<0.01) lengthened the larval period but not the pupal periods. The results were discussed in relation to the control of Tribolium castaneum.

Bangladesh j. entomol. (2008) 19(1), 9-17

INDIVIDUAL AND COMBINED EFFECT OF THREE PLANT EXTRACTS AND A CHEMICAL INSECTICIDE (SEVIN 85 SP) ON PULSE BEETLE

M. A. ISLAM1, K. S. AHMED2, A. B. KHAN2 & M. K. UDDIN3

1Islami Bank, B. Baria Branch, B.Baria; 2Department of Entomology,

BAU, Mymensingh; 3Entomology Division, BARI, Joydebpur, Gazipur, Bangladesh.

ABSTRACT

An experiment was conducted to evalute the individual and combined effect of garlic clove, neem leaf and bishkatali leaf extracts at 1%, 5%, 10% and Sevin 85 SP at 0.1%, 0.5%,1% for the protection of gram seeds against the pulse beetle, Callosobruchus chinensis L. The treatments were evaluated by considering rate of oviposition, adult emergence and seed weight loss (%) of the treated seeds. The she rate of oviposition was lowest in combined treatment of 10% neem and 1% Sevin 85SP. The lowest number of adult emergence, lowest seed damage as well as seed weight loss were observed in same treatment. Almost similar effects were found in combined treatments of 10% garlic clove extract and 1% sevin 85 SP treated seeds. The botanicals when treated singly also showed significant effect on oviposition, adult emergence and seed weight loss. The results suggested that among the tested botanicals and chemical insecticide combined treatment of 10% neem and 1% sevin 85 SP was the best protectant against pulse beetle. Higher dosages of plant extracts also showed statistically identical results to lower dose of the tested chemical insecticide; they might also be a suitable alternative to chemical insecticide.

Bangladesh j. entomol. (2008) 19(1), 19-27

EVALUATION OF JUTE MUTANTS/VARIETIES FOR RESISTANCE TO JUTE YELLOW MITE UNDER FIELD AND NET HOUSE CONDITIONS

MORZIA BEGUM & MD. KHALEQUZZAMAN

Entomology Division, Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh, Bangladesh.

ABSTRACT

Thirteen mutants of jute Corchorus capsularis along with their mother variety D-154 and one check variety Binadeshipat-2 were evaluated for their resistance against jute yellow mite, Polyphagotarsonemus latus Banks at Bangladesh Institute of Nuclear Agriculture (BINA) farm, Mymensingh during the year 2005. Considering the results of the field and nethouse experiments, the mutants CM-80, CM-84, CM-87,CM-88,CM-89,CM-92,CM-94,CM-96 and CM-78 were observed as moderately susceptible and the mutants CM-86,CM-102,CM-107, mother variety D-154 and the check variety Binadeshipat-2 were regarded as susceptible to yellow mite.

Bangladesh j. entomol. (2008) 19(1), 29-40

INCIDENCE PATTERN OF DIFFERENT HEMIPTERAN BUGS INFESTING RICE GRAIN

M. A. BEGUM & MAINUL HAQ

Entomology Division, Bangladesh Rice Research Institute,

Gazipur-1701, Bangladesh

ABSTRACT

A survey was conducted during 2004 and 2005 using sweep nets to determine the incidence pattern of rice bugs and other hemipteran bugs in rice grain at Bangladesh Rice Research Institute (BRRI) Farm, Gazipur in Aus (Summer rice), T. Aman (Monsoon rice) and Boro (Dry season rice) season. From the booting to ripening stage of rice crop five samples were collected in each season and the adult bugs were counted and recorded. The number of Hemipteran bugs were more in 2005 than in 2004, while the rice bug, Leptocorisa oratorius (Fab.) was the most abundant species during both the years especially in Aus season, followed by Pygomenida bengalensis (Westwood), Pachybrachius pacificus (Stal), Eysarcoris ventralis (Distant) and L. acuta (Thunberg). P. bengalensis prevailed more in seed bed and ratoon than other hemipteran bugs.

Bangladesh j. entomol. (2008) 19(1), 41-50

EFFECTS OF UV-RADIATION TO EGGS AND TRIFLUMURON TREATED LARVAL FOOD ON THE DURATION AND FORMATION OF LIFE STAGES OF ALPHITOBIUS DIAPERINUS (PANZER)

M. BEGUM, S. I. FARUKI1, K. A. M. S. H. MONDAL, A. M. S. REZA1, N. NAHER1, M. M. HAQUE1 & SELINA PARWEEN*1

Institute of Biological Sciences, Rajshahi University, Rajshahi 6205, Bangladesh

1Department of Zoology, Rajshahi University, Rajshahi 6205, Bangladesh

ABSTRACT

Total 150 eggs of 24 -h old of Alphitobius diaperinus (Panzer) were exposed to ultra-violet ray with 250nm wavelength and from a distance of 20.5cm for 1, 2, 4, 8 and 12 minutes. Another set of same number of UV-exposed eggs were raised to obtain 6-day old larvae. These larvae were fed on 10-5ppm triflumuron treated food until pupation. In both these treatments the larval and pupal durations were increased compared to the Control batch. The larval periods were increased significantly by uv-radiation for 12 minutes (F=38.91, P<0.001), and combined exposure to UV (for12 minutes) and triflumuron treated diet to larvae (F=39.81, P<0.001). The pupal period was extended up to 9.10±1.02 days in UV-exposed batch (F = 46.231, P<0.001) and 10.77±1.33 days in combined treatment (F = 110.18, P<0.001), when the UV exposure was for 12 minutes, which were significantly longer than the Control. The pupal recovery was decreased compared to the Control in UV-irradiated batch (F = 3.43, P<0.05, 12 min exposure) and in the combined treatment (F = 4.60, P<0.05, 12 min exposure). The subsequent adult emergence was decreased by 72.30 and 79.81% compared to the Control in UV-exposure alone (F = 4.45, P<0.05) and in combined treatment (F = 11.65, P<0.001), when the exposure time to irradiation was 12 minutes.

Bangladesh j. entomol. (2008) 19(1), 51-59

ABUNDANCE OF PREDACEOUS INSECTS AND SPIDERS ON DIFFERENT CROPS

*M. MAHMUDUNNABI1, M. R. U. MIAH2, M. A. HAQUE2, M. A. SARKAR1 & N. K. DUTTA1

1Entomology Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur; 2Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh.

ABSTRACT

A study was conducted at the experimental field of Banghabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh during January to May 2006 in order to know the abundance of predaceous insects and spiders on tomato, chickpea, pea, chilli, okra, brinjal, and sweet gourd ecosystem. In case of sweep net method predaceous insects and spiders visiting various crops, the highest number was observed in sweet gourd followed by tomato and the lowest was observed in chickpea field. In case of pitfall trap method, the highest number was observed in tomato followed by sweet gourd field and the lowest was observed in chilli field. Among the predaceous arthropods, ladybird beetle (Coccinellidae) and black ant (Formicidae) were found to be more abundant when collected by sweep net and pitfall trap method, respectively.

Bangladesh j. entomol. (2008) 19(1), 61-72

PREDATION EFFICIENCY OF LADYBIRD BEETLE MENOCHILUS SEXMACULATUS ON MUSTARD APHID LIPAPHIS ERYSIMI (KALT.) UNDER LABORATORY CONDITION

M. A. RAQUIB1, *M. MAHMUDUNNABI2, M. R. U. MIAH1 & M. Z. ALAM1

1Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural

University, Gazipur; 2Entomology Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh.

ABSTRACT

An experiment on the performance of Ladybird beetle (LBB) Menochilus sexmaculatus as a predator of mustard aphid was conducted. Consumption of aphids by LBB exposed to different densities (20, 40, 60, 80 and 100 per petridish) of aphids at three hours intervals were evaluated. The consumption of aphids by 10 days old LBB was highest (65.40) at the highest prey densities (100 aphids per petridish) and lowest at the age of 25 days old LBB (6.40) at the lowest prey densities (20 aphids per petridish). The consumption rate by LBB was the highest after 3 hours of release at different densities of aphids and it gradually decreased upto 9 hours of release. Aphid consumption by the LBB increased when the age of LBB was 10 days and afterwards it decreased gradually at the age of 30 days.

Bangladesh j. entomol. (2008) 19(1), 73-78

THE FLYING BEHAVIOR OF BRINJAL SHOOT AND FRUIT BORER (LEUCINODES ORBONALIS GUENEE) UNDER NET CAGE CONDITION

S. K. PAUL, M. A. HAQUE, M. Z. ALAM & M. A. MAZED

Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh

ABSTRACT

The flying behavior of brinjal shoot and fruit borer (Leucinodes orbonalis Guenee) was investigated under net cage condition at the Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur during March to May, 2006. Peak emerging time of adult BSFB moths (33.16%) was between 19:00-20:00 hrs. Adults remained motionless for half an hour just after emergence from pupa, then some of them started their frist flight. Maximum number of moths (49.27) started flying between 01.00 – 01.50 hrs after emergence. Three types of flying patterns were observed -curve, vertical and horizontal. The flight of most of the adult moths (46.67%) was curve flight. When the adults started frist flight, they went up to three different heights of plant canopy level – below plant canopy, at plant canopy and above plant canopy. The flying height of the maximum number of moths was at the canopy level (51.86%).

Bangladesh j. entomol. (2008) 19(1), 79-89

BIOLOGICAL ACTIVITY OF CELAFLOR  AGAINST PULSE BEETLE, CALLOSOBRUCHUS MACULATUS (FAB.)

M. AKTER1, M. A. HAQUE2, M. A. MONSUR3, M. K. QUAIS4 & H. BEGUM5

1,3,4 & 5 Soil Science Div., Plant Pathology Div., Rice Farming System Div., & Genetics Resources and Seed Div. respectively, BRRI, Gazipur;

2Dept. of Entomology, BAU, Mymensingh, Bangladesh.

ABSTRACT

The biological activity of Celaflor, a neem based insecticide was assessed at three different concentrations viz., 2.00%, 1.00% and 0.50%. on oviposition and developmental performance of pulse beetle, Callosobruchus maculatus (Fab.) as well as seed damage and weight loss of gram seeds caused by the insect. Significantly the lowest number of eggs per 100 seeds (47.67) was found in 2.00% concentration followed by 69.00 in 1.00% and 90.33 in 0.50% concentrations of Celaflor compared to 101.33 in untreated control. Significantly the lowest number of egg bearing seeds (33.00) per 100 seeds was recorded in 2.00% concentration, while the highest number (63.33) per 100 seeds was recorded in untreated control. With regard to development performance the highest number of adult emergence (72.33) was recorded in untreated control and the lowest (29.33) at 2.00% concentration. Significantly the lowest seed damage (19.67) was observed in 2.00% concentration followed by 36.33 in 1.00%, 46.00 in 0.50% and 53.67 in untreated control and they were statistically different. Similarly the highest weight loss (16.10%) was recorded in untreated control and the lowest (4.23%) at 2.00% concentration of Celaflor. It is concluded that Celaflor might be useful to protect pulse seeds against the infestation of pulse beetle, C. maculatus in storage.

Bangladesh j. entomol. (2008) 19(1), 91-96

Scientific Note

DISTRIBUTION OF LARVAE AND ADULTS OF TRIBOLIUM CASTANEUM (HERBST) AND TRIBOLIUM CONFUSUM DU VAL IN CYROMAZINE TREATED FOOD MEDIUM

A. H. M. HASANUZZAMAN,1 K. A. M. S. H. MONDAL &

SELINA  PARWEEN2*

Institute of Biological Sciences, Rajshahi University, Rajshahi, Bangladesh;

1Taherpur College, Rajshahi, Bangladesh;

2Department of Zoology, Rajshahi University, Rajshahi, Bangladesh.

Larvae and adults of Tribolium castaneum and Tribolium confusum were repelled by cyromazine 500, 1000 and 2000 ppm treated flour. The young larvae (1st and 2nd instars) of both species showed no difference of choice between the treated and untreated food. All doses of cyromazine significantly (p<0.001) repelled the older larvae and both sexes of adults. However, the level of repellency was similar for both the species.