Year 2008http://localhost:8080/handle/123456789/27522026-04-18T22:20:56Z2026-04-18T22:20:56ZHOST PREFERENCE AND MANAGEMENT OF WHITEFLY, BEMISIS TABACI GENN. ON OKRANASREEN, MST. KHURSHIDAhttp://localhost:8080/handle/123456789/12342019-10-01T06:28:34Z2008-06-01T00:00:00ZHOST PREFERENCE AND MANAGEMENT OF WHITEFLY, BEMISIS TABACI GENN. ON OKRA
NASREEN, MST. KHURSHIDA
An experiment was conducted in the field of Sher-e-Bangla Agricultural University,
Dhaka during March to July. 2007 to explore the resistance source(s) among four okra
varieties/genotypes against whitefly. Lk',nisia tabaci Genn. as well as to evaluate the
effectiveness of some selected management practices in controlling whitefly as well as
Okra wi/ow vein cleari'zg mosaic virus (OLYVCMV) on okra. Out of four okra varieties.
Hybrid Dherosh performed as highly resistant in respect of incidence of adult whitefly
()6.34 adults/S plants), OkYVCMV infected leaves (1.20%) and plants (9.60%). The two
varieties RU Dherosh 1 (28.93 adults/S plants. 4.39% leaf infection and 15.20% plant
infection, respectively) and BARI Dherosh 1(31.33 adults/S plants. 5.69% leaf infection
and 21.40% plant infection, respectively) pertbrmed as resistant and the variety Choice
Dherosh rated as highly susceptible host (67.60 adults/5 plants. 16.96% leaf infection and
74.40% plant infection, respectively). The incidence of adult whitefly was highly
significant and positively correlated to the incidence of both OLYVCMV infected leaves
and plants of okra. The resistant variety Hybrid Dherosh produced maximum number of
fruit per plant (14.33) and single fruit weight (16.97 gm) as well as the highest yield
(7210.3 kg/ha) as compared with the highly susceptible variety Choice Dherosh. which
produced minimum number of fruit per plant (8.40) and single fruit weight (12.17 gm) as
well as the lowest yield (3380.60 kg/ha). The incidence of OkYVCMV infected plants
was negatively correlated to the yield of okra varieties.
Among five different management practices applied against whitefly on okra. T1
(spraying of Admire 200 SI.. [Imidacloprid] 2I' 0.2 mI/titer of water at 7 days interval)
performed as best in reducing 79.63% adult whitefly incidence. 76.65% OkY\'CMV
infected leaves and 87.59% plant infection over control. Spraying of Admire 200 SI, 2i
0.2 mI/liter of water also performed as best in increasing 109.65% yield over control as
well as other yield attributes such as height of plant, number of branch per plant, number
of fruit per plant. Considering the economic analysis of the different management
practices, 14 (spraying of neem oil @J 3% at 7 days interval) considered as the most
profitable treatment in respect of BCR (9.23), which was ceo-friendly also. But in terms
of national demand. Ti (spraying of Admire 200 5Th (5 0.2 mI/liter of water at 7 days
interval) was the most effective treatment, which enhanced to produce maximum yield
(7048.83 kg/ha) and contributed reasonable 8CR (4.59).
A THESIS
Submitted to
Sher-e-Bangla Agricultural university, Dhaka
In partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
ENTOMOLOGY
SEMESTER: JANUARY-JUNE, 2008
2008-06-01T00:00:00ZSTUDIES ON THE EFFECT OF VARIATION IN SOWING DATES ON THE INCIDENCE OF CHICKPEA INFESTATION BY POD BORER HELICOVERPA ARMIGERA (HURNER) ITS BIOLOGY AND NEEM BASLD BOTANICALS MANAGEMENT IN LABORATORYROY, SASTHI PADAhttp://localhost:8080/handle/123456789/12332019-10-01T06:28:48Z2008-12-01T00:00:00ZSTUDIES ON THE EFFECT OF VARIATION IN SOWING DATES ON THE INCIDENCE OF CHICKPEA INFESTATION BY POD BORER HELICOVERPA ARMIGERA (HURNER) ITS BIOLOGY AND NEEM BASLD BOTANICALS MANAGEMENT IN LABORATORY
ROY, SASTHI PADA
The present study was conducted to evaluate the effects of variation in sowing dates on
chickpea, its biology and influence of neem based botanicals for the management of
the pest under laboratory condition in experimental field of Sher-e-langla Agricultural
University, Dhaka during Rahi 2007-2008. The sowing date was considered as
treatment to find out the incidence and damage severity of pod borer in chickpea
during the growing season. They were T1: Sowing on 10 November' 07; T: Sowing
on 20" November' 07; T3: Sowing on 30" November' 07; T4: Sowing on
December' 07' 15: Sowing on 20h December' 07; 15: Sowing on 30" December' 07.
On the other hand application of Neem based botanicals were considered as
treatments of the experiment which were: T: Spraying with neem oil @ 0.5% + trix
5gm; T2: Spraying with neem oil @31.0% + trix 5gm; T3: Spraying with neeni oil
1.5% ± trix 5gm; T. Sprayirg with neem seed kernel extract Ca,0.5% + trix 5gm; T:
Sprayirg with neem seed kernel extract @ 1.0% trix 5gm; T: Sprayirg with neem
seed kernel extract 1.5% ± trix 5gm; 17. Spraying with necm leaf extract Cz, 50m] +
trix 5gm and T8: Untreated control. The average length and breadth of the eggs was
0.45 ± 0.003 mm and of 0.4$ ± 0.004 mm with the average incubation period of 3.50 ±
0.15 days. The He/icorerpa anni,gera (Hubner) larva has six instars. The average
length and breadth of pre-pupal stage was 20.40±0.42mm and 4.37 ± 0.18mm with
average pre-pupal period of 1.89 ± 0.12 days. In case of male pupa the average length
and breadth was of 15.7 ± 0.28 mm and 2.51 ± 0.08 mm. again, in female it was 16.8 ±
0.26 mm and 3.31 ± 0.11 mm. At early fruiting stage, the highest percent of pod
infestation per plant (43.14%) was found in the treament 15 and the lowest (17.53 in
the treatment T1. At mid fruiting stage, the highest percent of pod infestation (52.35%)
per plant was found in the treatment T4 and the lowest (25.6 1%) was found in the
treatment T1. At late fruiting stage, the highest percent of pod infestation (58.52%) per
plant was found in the treatment T6 and the lowest (30.59%) in the treatment T1 . In
temis of yield, the highest yield (1538 kg/ha) was recorded in the treatment T2 and the
lowest (750 kg/ha) was recorded from the treatment Ti,. The highest pre-weight (3.35
m(T)
of full fed larva was recorded in the treatment T3 and the lowest (3.03 m(y) of in
the treatment 13. The highest total life span (32.23±0.31) was recorded in the treatment
T5, while the lowest (21.28±0.23) from 13. In case of the lanal cumulative mortality
for chickpea pod borer larva treated with different neem based botanicals the highest
percentage (20.33%) of morality was recorded from the treatment component '1'3,
whereas the lowest (3.00%) was recorded in T8. Considering the antifeedant effect of
different botanicals on chickpea pod borer larva in case of larval cumulative mortality
the highest percentage (I I.67%) of morality was recorded in the treatment Ti, whereas
the lowest (2.00%) was recorded in T.
A ThESIS
Submitted to
Sher-e-Bangla Agricultural university, I)haka
In pa rtia I iii 11111 ment of the req iii renidnts
for the degree of
MASTER OF SCIENCE (NIS)
IN
E Y FOM 0 LO C; V
SEMES'IER: ii LY-DECEMBER, 2008
2008-12-01T00:00:00ZEVALUATION OF SOME ECO-FRIENDLY MANAGEMENT PRACTICES AGAINST CUCURBIT FRUIT FLY ON RIDGE GOURDBHUYAN, MD. AMINUL HAQUEhttp://localhost:8080/handle/123456789/12322019-10-01T06:29:02Z2008-12-01T00:00:00ZEVALUATION OF SOME ECO-FRIENDLY MANAGEMENT PRACTICES AGAINST CUCURBIT FRUIT FLY ON RIDGE GOURD
BHUYAN, MD. AMINUL HAQUE
To evaluate the comparative effectiveness of some ceo-friendly management practices
against fruit fly oil ridge gourd an experiment was conducted at the experimental held
of Sher-e-Bangla Agricultural University (SAU), Dhaka. Bangladesh during March to
July 2007. The experiment, consisting six different eco-Illendly management
practices and an untreated control measures, was laid out in Randomized block design
(RCI31)) with 3 replications. ('onsidering the early, mid, late fruiting stages and mean
through out the cropping season of ridge gourd. Ts (spraying of neem oil @ 3% at 7
days interval) performed as best in reducing percent fruit inlstation by number
(77.75%. 74.02%. 63.67% and 71.23%, respectively) and weight (73.871
/o. 71.48%,
62.47% and 69.41%, respectively). The highest fruit yield (17.1$ t/ha) was also
recorded in neem oil treated plot (T5) and the lowest yield (13.62 t/ha) was recorded in
untreated control ('1'). The length, girth and single fruit weight were significantly and
posilively correlated with the yield of ridge gourd. The highest (5.7$) benelit cost ratio
(13CR) was calculated in neeni oil treated plot (T5) and the lowest BCR (2.16) in T1
(hand picking and (Iestruction of infested fruits from the plot at 7 days interval).
Considering the national demand and environmental saflly point of view, T (spraying
of neem oil @ 3 % at 7 days interval) was the most effective management practices
applied against fruit fly infesting ridge go.urd.
A THESIS
Submitted to
Sher-e-Bangla Agricultural University, Uhaka
In partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
ENTOMOLOGY
SEMESTER: JULY-DECEMBER, 2008
2008-12-01T00:00:00ZEFFECT OF SOME SELECTED INSECTICIDES ON BRINJAL SHOOT AND FRUIT BORER (Leudnodes othona/is Guenee) AND ARTHROPOD BIODIVERSITY IN THE BRINJAL FIELDMAMUN, MUHAMMAD ABDULLAR-ALhttp://localhost:8080/handle/123456789/12312019-10-01T06:29:15Z2008-06-01T00:00:00ZEFFECT OF SOME SELECTED INSECTICIDES ON BRINJAL SHOOT AND FRUIT BORER (Leudnodes othona/is Guenee) AND ARTHROPOD BIODIVERSITY IN THE BRINJAL FIELD
MAMUN, MUHAMMAD ABDULLAR-AL
Field experiment was conducted to evaluate the effect of some selected insecticides
on brinjal shoot and fruit borer (BSFB) (Leucinodes orbonalis Guenee) and
arthropod biodiversity in the brinjal agroecosystem at Sher-c-Bangla Agricultural
University (SAU) farm during November, 2007 to April, 2008. Fifteen species of
harmful arthropods under 15 families from 6 different orders were recorded in
brinjal agroecosystem. Among them BSFB, jassid, aphid, white fly and epilachna
beetle were found as the most common insect pcst of brinjal. Coleoptera was the
most common order of plant dwelling predatory insects, which occupied 5 1.17% of
the total predators. Surface dwelling arthropods caught in pitfall traps were grouped
into 17 families, among them, Formicidac ranked Lop followed by Lycosidae. Six
treatments comprising insecticides viz., carbosulfan 20EC. cartap 50SP,
cypermethrin IOEC, chlorpyriphos 20EC, flubendiamide 24WG and an untreated
control were tested. The experiment was laid out in Randomized Completely Block
Design (RCBD) with 3 replications. Among the treatments carbosulfan showed the
best efficacy providing more than 80% reduction of fruit infestation and gavc
highest healthy fruit yield (20.29 tiha) of brinjal. Almost similar results were
obtained by application of flubendiamide against brinjal shoot and fruit borer attack
Carbosulihu, cypermethrin and chiorpyriphos had strong negative effect and cartap
had moderate impact on the plant dwelling predaceous arthropods. Flubendiamide
had minimum impact on both plant and surface dwelling predaccous arthropods in
the brinjal agroccosystem.
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka-1207
in partial fulfillment of the requirements for the degree of
MASTER OF SCIENCE (M.S.)
IN
ENTOMOLOGY
2008-06-01T00:00:00Z