http://archive.saulibrary.edu.bd/handle/123456789/5602 Sun, 20 Sep 2026 15:41:14 GMT 2026-09-20T15:41:14Z http://archive.saulibrary.edu.bd/handle/123456789/5618 INCIDENCE AND SEVERITY OF CONTAMINATION OF SUBSTRATES OF MAPLE OYSTER MUSHROOM (Pleurotus cystidiosus) AND MANAGEMENT THROUGH CHEMICALS AND BOTANICALS Akhter, Khadija An experiment was conducted at the Plant Pathology laboratory and Mushroom Culture House (MCH) in the Department of Plant pathology, Sher-e-Bangla Agricultural University (SAU), during October, 2021 to April 2022, to investigate the prevalence of microorganisms on mushroom substrates and the efficiency of chemicals and botanicals on contaminations, growth and yield of maple oyster mushroom. The experiment was consisted of single factor and followed Completely Randomized Design (CRD). Sugarcane bagasse was treated with different botanicals and fungicides viz: Sulcox 50 WP (Copper oxychloride), Indofil M45 (Mancozeb), Mancer 75WP (12% Carbendazim+ 63% Mancozeb), 3% Hydrogen Peroxide, Lanatana (Lantana camera) and Nimbicidine with autoclaving. Different application along with sugarcane bagasse showed significant variations in respect of all characters of mushroom. Severity of contamination was varied from 4-66%, while during the 3 harvest, 66%, 4% and 12% contamination was observed in control, Sulcox-50WP and Indofil M-45, respectively. No severity of contamination was found when the substrate was supplemented with botanicals after autoclaving. The highest growth rate (0.45 cm/day), the maximum number of primordia /packet (82.4), the maximum number of effective fruiting bodies /packet ((42.2), biological yield (157.04 g), economic yield (125.0 g) were recorded from Copper oxychloride treated packet, while the lowest performance was obtained from control in all cases. Trichoderma harzianum and Aspergillus niger were isolated and identified from contaminated spawns. Under In-vitro evaluation of chemicals, maximum inhibition of Trichoderma harzianum (68.76%) and Aspergillus niger (91.28%) were recorded from 3% hydrogen peroxide treated plate. In case of botanicals, Aspergillus niger (41.96%) and Trichoderma (30.67%) were inhibited by Lantana, while, Trichoderma (27.7%) and Aspergillus niger (26.16%) was inhibited by Nimbicidin. The economic yield of oyster mushroom was correlated positively with number of fruiting bodies and the biological efficiency. It may be revealed that supplementation with botanicals after autoclaving is the best option to mitigate the substrate contamination of maple oyster mushroom. Mon, 01 Jun 2026 00:00:00 GMT http://archive.saulibrary.edu.bd/handle/123456789/5618 2026-06-01T00:00:00Z http://archive.saulibrary.edu.bd/handle/123456789/5617 INVESTIGATION AND MEASUREMENT OF DISEASES OF SEED SPICES AND CULINARY HERBS OF BANGLADESH Ahmmed, Abu Noman Faruq An experiment was conducted for detection and identification of diseases of seed spices and to measure their incidence and severity during 2021-2022. The disease incidence and severity were recorded under natural epiphytic conditions. The most common seed spices and herbs of Bangladesh are coriander, cumin, dill/ Indian dill, black cumin, fennel, fenugreek, sickle fruit fenugreek, celery and ajowan were considered for this experiment. The mentioned nine species are mostly herbaceous plants which belong to different genus and different families respectively. Like other corps, seed spices and culinary herbs are not free from microbial (fungus, bacteria, nematode, virus etc.) infection and diseases. In the field experiment of these nine seed spices, identified diseases were foot & root rot, leaf spot, leaf blight, umbel blight etc. Foot and root rot disease was noticed severely in fenugreek field at the seedling stage and also in black cumin that was caused by Sclerotium rolfsii. Among the three varieties, the lowest disease incidence was recorded in BARI Methi 3, and the highest disease incidence was recorded in BARI Methi 2. Leaf spot was recorded in coriander which is caused by Fusarium spp. Both disease incidence and disease severity were the highest in BARI Dhonia 2. Leaf blight disease was recorded in fennel, cumin, wild celery, ajowan and dill which were caused by different species of Alternaria. Umbel blight was recorded in fennel also caused by Alternaria spp. Umbel blight also observed in wild celery and ajowan field but only few umbels were affected. In case of leaf and umbel blight there was no significance difference between BARI Mouri 1 and BARI Mouri 2. However, in case of cumin, dill, wild celery and Ajowan, disease incidence and disease severity was increased with the increasing age of the plant. All cumin plants were blighted before flowering stage was caused by Alternaria spp. Powdery mildew disease was observed in coriander and dill field but a very small portion of umbel were affected. Mon, 01 Jun 2026 00:00:00 GMT http://archive.saulibrary.edu.bd/handle/123456789/5617 2026-06-01T00:00:00Z http://archive.saulibrary.edu.bd/handle/123456789/5616 INTEGRATED APPROACH FOR THE MANAGEMENT OF FOOT AND ROOT ROT DISEASE OF LENTIL CAUSED BY Sclerotium rolfsii Ahmmed, Abu Noman Faruq An experiment was conducted for the management of foot and root rot of lentil caused by Sclerotium rolfsii at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from October 2022 to March 2023. Fifteen different treatments and an untreated control were assessed against the disease. These treatments include chemical fungicide (eg. Tilt 250 EC @0.1%, Autostin 50 WP @0.3%), Bio-fungicides (eg. Dynamic @0.1%, Bioderma @0.4%, Lycomax @0.4%), soil amendments (Bioderma Peat soil @1t/ha, Poultry refuse @5t/ha) and integration of those. Susceptible variety BARI Masur-1 was used in this experiment. In field experiments, the lowest disease incidence was recorded in T (Dynamic + Lycomax + Poultry refuse) which was (1%) in vegetative stage, (1.66%) in flowering stage and maturity stage. The highest disease incidence was observed in T (control) which was (18.66%) in vegetative stage, (32.33%) in flowering stage and (46.66%) in maturity stage. In all cases of growth parameters viz. plant height (cm), no. of branch, shoot length (cm), root length (cm) were the highest in T 15 and lowest in T 16 16 . In case of fresh plant weight (g/m ) the highest value was observed in T (Dynamic + Bioderma + Poultry refuse) which was (1166.7 g) and the lowest was observed in T 14 ((199.3 g). In case of no. pod/plant, yield per plot (g/m 2 ), yield per plant (g/m 2 16 ) the highest value was observed in T and the lowest was observed in T 16 . From the above findings, T 15 15 (seed treated with Dynamic, soil treated with Bioderma and soil application of poultry refuse) gave the best result against foot and root rot disease of lentil disease. 15 2 Mon, 01 Jun 2026 00:00:00 GMT http://archive.saulibrary.edu.bd/handle/123456789/5616 2026-06-01T00:00:00Z http://archive.saulibrary.edu.bd/handle/123456789/5615 EVALUATION THE STATUS OF COMMERCIAL HYBRIDS MAIZE IN RESPONSE TO TRANSMIT THE VIRUSES CAUSING MAIZE LETHAL NECROSIS DISEASE (MLND) Hossain, Md. Belal Virus transmission through seed is common method in many annual crops including maize. Transmission of viruses causing maize lethal necrosis disease (MLND) through seed has been reported. An experiment was conducted in the laboratory and field condition under the Department of Plant Pathology of Sher-e-Bangla Agricultural University, Dhaka-1207 during 2022-2023.The lab experiment was carried out in a Completely Randomized Design (CRD) with four replications and the field experiment in a Randomized Complete Block Design (RCBD) with three applications. In total ten varieties/lines viz., GT722, HEERA-55, 10V20, Tain-927, APURBA-784, Kohinoor, Konok, SUPER-92, Super Shine-2760 and Sweet corn were selected for conducting the experiments. Among the tested maize varieties/lines, the lowest disease incidence and severity (at reproductive stage) of MLND was found in variety HEERA-55 and the highest in line GT-722 and variety SUPER-92. According to disease rating scale used in this study, all the tested varieties/lines showed highly susceptible while variety HEERA-55 showed susceptible reaction. From the findings of the study, it was revealed that out of ten tested varieties/lines, two varieties; Super Shine2760 and SUPER-92 showed better performance in terms of morpho-physiological features as well as yield and yield contributing characters as compared to other tested varieties/lines against MLND. It was also revealed that chlorophyll content was higher in healthy leaves then diseased leaves due to MLND. From the findings on different parameters considered in the present study, it can be concluded that viruses caused maize lethal necrosis disease (MLND) in maize transmitted through the seeds. Mon, 01 Jun 2026 00:00:00 GMT http://archive.saulibrary.edu.bd/handle/123456789/5615 2026-06-01T00:00:00Z