Year 2015
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/2724
2024-03-29T03:35:13ZROOT COLONIZATION AND PERSISTENCE· OF Purpureocillium lilacinum IN RBIZOSPHERE AS INFLUENCED BY SOME CROP SPECIES AND Meloidogyne incognita
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/4321
ROOT COLONIZATION AND PERSISTENCE· OF Purpureocillium lilacinum IN RBIZOSPHERE AS INFLUENCED BY SOME CROP SPECIES AND Meloidogyne incognita
RAHMAN, MD. MOSTAQUR
The 'effect of ten crop species along with two different rooting media viz" coco dust
and soil on the root colonization ability of the fungal BCA Purpureocillium
lilacinum and its persistence in rhizosphere of the ten crop species along with the
presence or absence of nematode were evaluated through a test tube experiment in
laboratory and, a pot experiment in shade house. P. lilacinum resulted, in root
colonization in all of the crop species in varying percentage depending on the
rooting media and the crop species themselves. A constant 100% and an average of
45.30% root colonization were obtained in coco dust and in soil, respectively. In
soil, a maximum and a minimum root colonization was observed in cucumber
(67.17%) and chickpea (30.55%), respectively; whereas maize (55.50%), potato
(50%), brinjal (48.14%), cabbage (44.28%), rice (44.26%) and tomato (43.45%);
wheat (37%), soybean (32.07%) gave statistically similar result to cucumber and
chickpea, respectively. Population dynamics of the fungus showed no significant
difference between soil without crop species and soil from the root zone of majority
of the test crop species. Overall, 8 out of 10 crop species showed higher densities
compared to soil. Of them, 3 (maize, brinjal, soybean) showed significantly higher
CFU/g of soil whereas the-rest 5 (rice; wheat, potato; cucumber, chickpea) showed
insignificantly higher CFU/g of soil and conversely, 2 (tomato and cabbage) showed
significantly lower CFU/g of-soil in the rhizospbere compared to soil. Both the crop
species (in most cases) and the nematode population did not exert significant effect
whereas time was the factor to have an obvious effect on the population densities of
P. lilacinum. The reduction in CFU/g of soil compared to initial densities ranged
from 6.5% in brinjal to 14.'6% in cabbage, 9.8% in brinjal to 21.8% in cabbage, and
17.3% in maize to 32% intomato at 10, 20 and 30 DAI.
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in Partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
PLANT PATHOLOGY
2015-01-01T00:00:00ZEDITING STANDARDIZATION ON TEMPERATURE AND TIME FOR HOT WATER TREATMENT OF SELECTED CROPS AGAINST SEED BORNE DISEASES
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/4320
EDITING STANDARDIZATION ON TEMPERATURE AND TIME FOR HOT WATER TREATMENT OF SELECTED CROPS AGAINST SEED BORNE DISEASES
AKTER, MD. BABUL
The experiment was conducted at the Central Laboratory of the Department of
Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka-1207, during July
2014 to December 2015. Effect of hot water treatment at different temperatures
with varying durations on important seed-borne pathogens of rice, wheat, country
bean, tomato and eggplant seeds were studied. Seeds dipping in hot water at 50 to
60° e for 5, 10 and 15 mins were evaluated for standardization of temperature and
time for controlling seed-borne pathogens. Hot water treatment at 53/ 54°C for 15
mins gave the highest seed germination (90%) and completely eradicated seed
infection by Bipolaris oryzae and Fusarium spp. of rice seed. Wheat seeds dipped
in hot water at 51 / 52°e for 10 min yielded the maximum seed germination (90%)
and reduced seed infection of Bipolaris sorokiniana and Fusarium spp. For
country bean, 55 156°C for 15 mins was found effective with the highest seed
germination (85%) and no seed infection of Aspergilus niger. In case of tomato
and eggplant seeds 53 / 54°C for 15 mins gave the highest seed germination (88%,
90%, respectively) and no seed infection (0.0%). Hot water treated seeds sown in
the pot soil gave 33.75%,200/0,21.5%,22.5% and 20% higher seed germination,
respectively for rice, wheat, country bean, tomato and eggplant in comparison to
untreated control. Therefore, hot water treatment of specific temperature may be
suggested for controlling important seed-borne pathogens of rice, wheat, country
bean, tomato and eggplant seeds for enhancing seed germination and reduction of
seed infection.
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in Partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
PLANT PATHOLOGY
2015-01-01T00:00:00ZEVALUATION OF TOMATO GENOTYPES AGAINST TOMATO YELLOW LEAF CURL VIRUS (TYLCV)
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/4319
EVALUATION OF TOMATO GENOTYPES AGAINST TOMATO YELLOW LEAF CURL VIRUS (TYLCV)
SYDUJJAMAN, SYED MD.
Present studies had been conducted to evaluate different varieties and lines of tomato
against Tomato yellow leaf curl virus (TYLCV) during the period from October 2014 to
March 2015. Five varieties namely BARl Tomato-J, BARl Tomato-Z, BARI Tomato-9,
Loc81jessore-2, Local jessore-J and five lines namely BD-7276, BD-7281, BD-7290,
BD-7754, BD-7762 were evaluated against Tomato yellow leaf curl virus (TYLCV). The
effect of diseases on yield and yield contributing characters were also observed. The
tomato varieties and lines differed significantly among themselves in respect of disease
incidence. The highest disease incidence was found in Local Jessore-3 (100%), Bd-7281
(100%), BD-7754 (100010) and BD-7762 (100%). The lowest disease incidence was found
in the variety BARI Tomato-9 (00%). Considering the performance of selected tomato
varieties and lines, it was observed that line BD-7276 was graded as tolerant against
Tomato yellow leaf curl virus (TYLCV). The cultivars BARI Tomato-3, BARI Tomato-7,
Local Jessore-2 and line BD-7290 showed moderate resistance, while the Jines BD-7762,
BD-7754, BD-7281 and Loc81jessore-3 were highly affected by Tomato Yellow Leaf
Curl Virus (TYLCV) among different treatments used in the experiment. In case of
number of leaves, branch and flowers per plant, the maximum number of leaves, branch
and flowers was recorded in the variety BARI Tomato-9 (72.00, 10.67 and 68.33
respectively). The minimum number of leaves, branch and flowers was obtained in the
variety Local Jessore-3 (47.67, 6.00 and 51.67 respectively). On the basis of yield and
yield contributing characters, the yield performance also differed significantly. The
highest yield per plant was recorded in the variety BARI Tomato-9 (2.70 kg) and the
lowest in Local Jessore-3 (1.09 kg). In case of the physiological features, we also
founded a significant difference among the different varieties and lines. In case of net
chlorophyll content, net assimilation rate, intercellular carbon-di-oxide concentration and
respiration rate per plant, in 811cases the highest value was recorded in the variety BARI
Tomato-9 (65.17,1.03,37.33 and 1.25 respectively) and the lowest was in Local Jessore3
(40.20, 0.33, 16.67 and 0.33 respectively).
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in Partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
PLANT PATHOLOGY
2015-01-01T00:00:00ZYIELD LOSS ASSESSMENT OF WHEAT DUE TO LEAF BLIGHT DISEASE CAUSED BY Bipolaris sorokiniana
http://archive.saulibrary.edu.bd:8080/xmlui/handle/123456789/4318
YIELD LOSS ASSESSMENT OF WHEAT DUE TO LEAF BLIGHT DISEASE CAUSED BY Bipolaris sorokiniana
NOWRIN, SANTA ISLAM
The experiment was conducted in the farm of Sher-e-Bangla Agricultural University
and central laboratory of the Department of Plant Pathology, Sher-e-Bangla
Agricultural University, Dhaka-1207 during the Rabi season from November 2014 to
June 2015. The experiment was laid out in a RCBD (one factor) with three
replications. Multiple treatment experiment with 11 treatments, viz. To (control); Tl (1
spray with Tilt 250 EC @ 0.1%); T2 (2 sprays with Tilt 250 EC @ 0.1%); T3 (3 sprays
with Tilt 250 EC @ 0.1%); T4 (4 sprays with Tilt 250 EC @ 0.1%); r,(5 sprays with
Tilt 250 EC @ 0.1%); T6 (6 sprays with Tilt 250 EC @ 0.1%); T7 (7 sprays with Tilt
250 EC @ 0.1%); Ts (8 sprays with Tilt 250 EC @ 0.1%); T9 (9 sprays with Tilt 250
EC @ 0.1%); TIO (10 sprays with Tilt 250 EC @ 0.1%) were applied in the
experiment to make the variation in the disease severity and respective yield of treated
plot. Different treatment comprising different number of spraying had remarkable
influence the disease severity of leaf blight, yield and yield contributing characters of
wheat. The lowest (0.0%) percent disease index (PDI) and the highest yield (5.35t1ha)
was recorded in case of treatment Tro where 10 spraying were done with Tilt-250 EC
@ 0.1%. The highest PDI and the lowest yield were counted in case of treatment To
(control). The disease severity and yield was varied significantly on the basis of
number of spraying. Using the varied disease severity (PDI) and the corresponding
yield the regression equation for yield loss assessment was constructed as Y = 2.58+
0.40Xi where 0.4 % loss of yield would be incurred for increasing each percent of
disease severity (PDI).
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in Partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
PLANT PATHOLOGY
2015-01-01T00:00:00Z