Bangladesh j. entomol. (2008) 18(1), 1-9
PREDATION EFFICIENCY OF JUMPING SPIDER, PHIDIPPUS BENGALENSIS (TIKADER) ON RICE BROWN PLANTHOPPER, NILAPARVATA LUGENS (STAL)
M. M. RAHMAN, M. JAHAN & K. S. ISLAM
Department of Entomology, Bangladesh Agricultural University, Mymensingh
Prey preference and functional response of the predatory jumping spider, Phidippus bengalensis (Tikader) preying on brown planthopper (BPH), Nilaparvata lugens (Stal) were studied in the laboratory of Entomology Department, Bangladesh Agricultural University. Prey preference of the predator was observed through ‘choice test’ and ‘no choice test’. In choice test, P. bengalensis showed the topmost preference for the second instars of BPH nymphs which is followed by the third and first instars. The jumping spider displayed a moderate preference for the fourth instars of BPH nymphs, while it had minimum preference for the fifth instar and adult brown planthopper. This pattern of prey preference was not consistent with the result of no choice test, which indicates that P. bengalensis has good predation efficiency for all the stages of BPH depending on the availability. Functional response of the predator showed a significant reduction of the prey when released at different prey population at different time intervals. On an average, a single P. bengalensis reduced 92.50% and 74.40% of BPH in 72 hours when released at prey populations of 35 and 55 BPH, respectively. Besides, the predator reduced 28.40% and 35.0% of BPH in 24 hours when release was made at prey population of 55 and 35 BPH, correspondingly. In contrast, no change in the BPH population was evident in predator free condition. The result may have some implication in biocontrol of BPH of rice.
Bangladesh j. entomol. (2008) 18(1), 11-21
EFFECT OF DIFFERENT PHEROMONE TRAP DESIGNS AND INSTALLATION HEIGHT IN THE BRINJAL FIELD FOR CATCHING BRINJAL SHOOT AND FRUIT BORER MALE MOTH
A. B. M. ANWAR UDDIN1, S. N. ALAM2 & M. Z. ALAM3
1Entomology Division, Bangladesh Rice Research Institute, Gazipur
2Entomology Division, Bangladesh Agricultural Research Institute, Gazipur
3Department of Entomology, BSMRAU, Salna, Gazipur
Two studies were conducted at the experimental field of Entomology Division, Bangladesh Agricultural Research Institute (BARI), during October 2003 to March 2004 on different trap designs and trap heights for effective trapping of Brinjal Shoot and Fruit borer (BSFB) male moths. Among the three trap designs tested, Bangalore “open water trap” was the most effective in trapping BSFB moths, followed by BARI water trap and Indian funnel trap. Significantly higher number of BSFB moths were caught in the traps set below canopy level (0.5 m above ground) and at canopy level (1m above ground) than that of above canopy level (1.5m above ground level). Trap set below canopy level caught 5.44 times more BSFB male moths followed by traps set at canopy level (4.66 times) compared to those placed at upper canopy level.
Bangladesh j. entomol. (2008) 18(1), 23-33
LIFE TABLES OF XYLOCORIS FLAVIPES (REUTER) (HEMIPTERA: ANTHOCORIDAE) AT DIFFERENT CONSTANT TEMPERATURES FEEDING ON CRYPTOLESTES PUSILLUS (SCHON.) (COLEOPTERA: CUCUJIDAE)
M. M. RAHMAN1, *W. ISLAM1 & K. N. AHMED2
1Institute of Biological Sciences, Rajshahi University, Rajshahi-6205, Bangladesh
2BCSIR Laboratories, Dhaka, Bangladesh
Xylocoris flavipes (Reuter) is an efficient polyphagous predator of eggs, larvae and pupae of Cryptolestes pusillus (Schon.). The temperature response of X. flavipes was studied at five constant temperatures: 15, 20, 25, 30 and 35ºC. The lowest mortality percentage of eggs was recorded at 20ºC and the highest at 35ºC but at 15ºC none of the females laid eggs and no adult X. flavipes survived more than 3-5 days. The developmental time from first instar to adult decreased with temperature reaching the lowest value at 35ºC (9.51 days). Adult female longevity was strongly affected by temperature, decreasing from 17.25 days at 25ºC to 7.28 days at 35ºC. Male longevity followed a similar trend to the one observed for females. Mean total fecundity per female was highest at 25ºC and lowest at 20ºC. The net reproductive rate (R0) was highest at 25ºC and the highest (rm) was also recorded at the same temperature. At this latter temperature, the highest mean generation time (T) and doubling time (D) were also observed. The finite capacity for increase (λ) was augmented slightly with higher temperatures.
Bangladesh j. entomol. (2008) 18(1), 35-44
BIOPHYSICAL AND HISTOLOGICAL BASIS OF RESISTANCE TO BRINJAL SHOOT AND FRUIT BORER, LEUCINODES ORBONALIS IN BRINJAL
A K M KHORSHEDUZZAMAN1, M. Z. ALAM2, M. M. RAHMAN2,
M. A. KHALEQUE MIAN3, M. ISMAIL HOSSAIN MIAN4 & M. MOFAZZAL HOSSAIN5
1Senior Scientific Officer (Entomology), Horticulture Research Center, Bangladesh Agricultural Research Institute, Gazipur-1701; 2, 3, 4 &5Professor, Department of Entomology, Department of Genetics and Plant Breeding, Department of Plant Pathology and Department of Horticulture, respectively; Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur-1706, Bangladesh
Studies on the biophysical and histological characters of five brinjal genotypes showed that genotype with higher percent shoot pith area had higher degree of susceptibility to borer attack. Lignifications of tissue coupled with compact vascular bundles confer resistance against brinjal shoot and fruit borer. Plant with spready and semi-erect nature received lower shoot damage compared to the erect one. Long and compact seed-ring and closely arranged seeds in mesocarp exhibited resistance. Fruits with less seedless area suffered less fruit damage as compared to genotypes with more seedless area.
Bangladesh j. entomol. (2008) 18(1), 45-54
INTRINSIC RATE OF NATURAL INCREASE (rm) OF LIPAPHIS ERYSIMI (KALT.) (HOMOPTERA : APHIDIDAE)
P. K. SARKER1, M. M. RAHMAN2 & B. C. DAS3
1Department of Zoology, Ghoraghat Degree College, Osmanpur, Dinajpur, Bangladesh;
2Department of Zoology, Barura Shaheed Smriti Govt. College, Comilla, Bangladesh;
3Department of Zoology, University of Rajshahi, Rajshahi-6205, Bangladesh.
Intrinsic rate of natural increase (rm) of Lipaphis erysimi (Kalt.) was studied on Brassica juncea (Var. Sonali-75) for five generations. Mean rm values along with their standard errors were calculated as: 0.399±0.003, 0.389±0.005, 0.382±0.006, 0.381±0.003 and 0.386±0.004 for F1 to F5 generations, respectively. Temperature (p<0.01) and dew point (p<0.05) influenced the rm of L. erysimi significantly, whereas relative humidity had no such influence.
Bangladesh j. entomol. (2008) 18(1), 55-67
USE OF SOME CONTAINERS, CHEMICALS AND INDIGENOUS MATERIALS FOR PROTECTION OF WHEAT SEEDS IN STORAGE
M. Y. ALI, M. A. LATIF, M. ALI & M. M. ALI
Department of Entomology, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka, Bangladesh
An experiment was conducted to evaluate the individual and combined effect of some containers, chemicals and indigenous materials for protection of wheat seeds in storage. Wheat seeds were stored in four types of containers (Tin kouta, earthen pot, plastic container and gunny bag) with two types of chemicals (Naphthalene and camphor) and two indigenous materials (neem leaf powder and sand). Among the different containers, the lowest population of grain moth (0.0-4.67), red flour beetle (7.0-28.67) and rice weevil (0.0-6.00) was recorded from the plastic container in combination with naphthalene and camphor. The lowest percent of grain infestation (7.25-26.30% by number and 11.51-26.68% by weight) was observed in the same treatment after 8 months of storage. Considering the combination of containers and materials, plastic container or tin kouta with naphthalene or camphor provided better protection of wheat seeds in storage. The germination percentage of stored seed varied between 83.33-100.0% at different times after storage in plastic containers combined with camphor or naphthalene. Present findings suggest that wheat seeds can be stored either in plastic or tin kouta using camphor or naphthalene from harvest to sowing period.
Bangladesh j. entomol. (2008) 18(1), 69-79
DIVERSITY AND EQUITABILITY OF PREDACEOUS INSECTS AND SPIDERS ON DIFFERENT CROPS
*M. MAHMUDUNNABI1, M. R. U. MIAH2, M. N. ISLAM2, A. M. AKANDA3 &
N. K. DUTTA1
1Entomology Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, Bangladesh; 2&3Department of Entomology & Department of Plant Pathology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh.
This study was conducted at the experimental field of Banghabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh during January to May 2006 to know the diversity and equitability of predaceous insects and spiders on different crops with a view to conserve them to enhance the biological control of insect pests. The diversity index and equitability were measured for the predaceous insects and spiders recorded on tomato, chickpea, pea, chilli, okra, brinjal, and sweet gourd. The results indicated that the diversity index for predaceous insects and spiders when collected by pitfall traps were found higher in tomato irrespective of stages of the crops. On the other hand, the diversity index for predaceous insects and spiders when collected by sweep net was higher in sweet gourd at mid – and late stages of the crops. A positive relationship was found between the number of families with diversity index at early, mid – and late stage crop growth. But a negative relationship was found between the number of families and equitability at those stages when assessed by sampling using pitfall trap, sweep net and their combination.
Bangladesh j. entomol. (2008) 18(1), 81-89
EFFECT OF DIFFERENT PHEROMONE DISPENSERS (LURES) AND THEIR LOCATION IN THE BRINJAL FIELD FOR TRAPPING BRINJAL SHOOT AND FRUIT BORER MALE MOTH
A. B. M. ANWAR UDDIN1, S. N. ALAM2 & M. Z. ALAM3
1Entomology Division, Bangladesh Rice Research Institute, Gazipur;
2Entomology Division, Bangladesh Agricultural Research Institute, Gazipur;
3Department of Entomology, BSMRAU, Salna, Gazipur
Studies were undertaken at the experimental field of Entomology Division, Bangladesh Agricultural Research Institute (BARI) during October 2003 to May 2004 on different pheromone dispensers (Lures) and trap locations in the brinjal field to evaluate the efficiency of trapping BSFB male moths. Rubber septa lures of Agroland Biotech Ltd. attracted and trapped significantly higher number of BSFB moths (15.55moth/trap), while lure of NRI, UK secured the second position (9.58 moth/trap). Lures collected from Ganesh Bio-control and AgroSense attracted significantly less numbers of BSFB. Trap setting at edge of the brinjal field was the most effective. It trapped 1.8 times more BSFB moths than the traps set at the centre of the field.
Bangladesh j. entomol. (2008) 18(1), 91-99
LABORATORY EVALUATION OF SOME INDIGENOUS PLANT EXTRACTS AS REPELLENT AGAINST RED FLOUR BEETLE, TRIBOLIUM CASTANEUM HERBST
M. S. A. MAMUN1, M. SHAHJAHAN2 & M. AHMAD3
1Scientific Officer, Entomology Division, Bangladesh Tea Research Institute, Srimangal, Moulvibazar; 2&3Professor, Department of Entomology, Bangladesh Agricultural University, Mymensingh
Experiments were carried out to evaluate the repellency extracts of six plants, Bazna (Zanthoxylum rhetsa Roxb.), Ghora-neem (Melia sempervirens L.), Hijal (Barringtonia acutangula L.), Karanja (Pongamia pinnata L.), Mahogoni (Swietenia mahagoni L.) and Neem (Azadirachta indica A.Juss.) against the red flour beetle, Tribolium castaneum Herbst. Leaf and seed extracts of plants were prepared by using acetone, methanol and water as solvents. Results showed that extracts of all the six plants had repellent effects on red flour beetle. Neem extracts showed the highest repellent effect and Hijal the lowest. Among the solvents, water performed better than others. The repellency of most of the plant extracts was found to increase with increase of doses and decrease with increase of time.
Bangladesh j. entomol. (2008) 18(1), 101-106
INCIDENCE OF MAJOR INSECT PESTS ATTACKING MUNGBEAN IN RELATION TO SEASONAL VARIATION
M. A. SARKAR1, M. A. MANNAN2, N. K. DUTTA1,
M. MAHMUDUNNABI1 & M. M. R. SALIM3
1&2Entomology Division & Farm Division, respectively; Bangladesh Agricultural Research Institute, Joydebpur, Gazipur; 3Agricultural Research Station, Thakurgaon.
To determine the severity of major insect pests attacking mungbean a study was conducted at Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur during Kharif-I, 2007 and 2008. In Kharif-I, 2007 cropping season, the severity of stem fly, thrips and pod borer of mungbean was higher than that of Kharif-I, 2008. Among the pests the stem fly infestation was higher following 20 days after sowing in both the cropping seasons. The number of thrips in each flower was the highest at 50% flowering stage of the crop. Mean pod damage percentage was recorded 9.87 in Kharif-I, 2007 which was only 1.8 in Kharif-I, 2008. The results revealed that the severity of major insect pests might be due to variable weather conditions in the two cropping seasons.
Bangladesh j. entomol. (2008) 18(1), 107-110
PLUME MOTH, SPHENARCHES ANISODACTYLUS ATTACKING COUNTRY BEAN: A NEW RECORD IN BANGLADESH
S. N. ALAM1, A.K.M.Z. RAHMAN1 & A. CORK2
1Entomology Division, BARI, Gazipur, 2University of Greenwich, UK.
An unidentified borer pest was recorded for the first time in 2003 from country bean (Dolichos lablab) in Bangladesh. The insect as identified as the plume moth, Sphenarches anisodactylus (Walker), (Order: Lepidoptera, Family: Pterophoridae, Subfamily: Pterophorinae). Larvae of S. anisodactylus fed mainly on the flowers of country bean (infestation status was 11.47 – 16.05%), whereas pod infestation was less than 04%.