scholarly journals Rice Bakanae Disease: Yield Loss and Management Issues in Bangladesh

2021 ◽  
Vol 9 (1) ◽  
pp. 7-16
Author(s):  
Latif MA ◽  
Uddin MB ◽  
Rashid MM ◽  
Hossain M. ◽  
Akter S. ◽  
...  
Keyword(s):  
Yield Loss ◽  
Bakanae Disease ◽  
Management Issues

scholarly journals Estimation of yield loss and relationship of weather parameters on incidence of bakanae disease in rice varieties under shallow low land ecologies of Eastern India

2021 ◽  
Vol 42 (4) ◽  
pp. 995-1001
Author(s):  
S. Raghu ◽  
◽  
G. Guru-Pirasanna-Pandi ◽  
M.S. Baite ◽  
M.K. Yadav ◽  
...  
Keyword(s):  
Yield Loss ◽  
Disease Incidence ◽  
Maximum Yield ◽  
Significant Negative Correlation ◽  
Susceptible Variety ◽  
Eastern India ◽  
Rice Varieties ◽  
Bakanae Disease ◽  
Weather Parameters ◽  
Relationship Of

Aim: To assess yield loss in different rice varieties due to rice bakanae disease and to understand the role of weather parameters on disease incidence and losses. Methodology: Roving survey and surveillance was carried out for three consecutive years to assess the status of rice bakanae disease among twenty popular rice varieties growing in Eastern India. Field experiment was conducted for three successive years, i.e., 2016, 2017 and 2018 at Cuttack. Highly susceptible variety Pooja was selected for the experiment. Data on disease incidence was collected daily from 10 days after transplanting to harvesting stage and data were recorded at standard meteorological week. Correlation was performed to find the effect of different weather parameters on the incidence of bakanae disease on rice. Results: Disease being seed borne caused significant reduction in yield and quality. The maximum disease incidence was recorded in Pooja with 18.25, 28.50 and 40.25 per cent in three years. The same variety showed maximum yield loss of 35.26 per cent compared all other varieties. The data on relationship of bakanae disease incidence with weather parameters showed that the rainfall (-0.444) had significant negative correlation during 2018, while RH (0.525 and 0.606) had significant positive correlation during 2017 and 2018. Interpretation: This study gives some information for formulating breeding programs to develop resistant varieties and management measures for preventing Bakanae disease.

scholarly journals Evaluation of Fungicides for the Control of Bakanae Disease of Rice Caused by Fusarium moniliforme (Sheldon)

2015 ◽  
Vol 19 (1) ◽  
pp. 49-55 ◽  
Author(s):  
MS Hossain ◽  
M Ayub Ali ◽  
MIU Mollah ◽  
MAI Khan ◽  
AKM Sajjadul Islam
Keyword(s):  
Seed Germination ◽  
Fresh Water ◽  
Fusarium Moniliforme ◽  
Seed Treatment ◽  
Yield Loss ◽  
Bakanae Disease ◽  
Overall Performance ◽  
Concentration Levels ◽  
Seedling Infection

Bakanae is one of the major diseases of rice in Bangladesh and causes substantial yield loss. To control the disease eleven fungicides from different fungicidal groups were evaluated for their efficacy against seed-borne fungus, F. moniliforme as seed treatment both in the laboratory and in the seed-bed during 2011 and 2012. In the laboratory the fungicides were evaluated at three concentration levels viz 2.5, 3.0 and 3.5 gm/L/kg seeds. Overall performance of the fungicides was found to be better in suppressing the seed-borne F. monilifome and increasing seed germination. Among the fungicides, Bavistin, Sunphanate, Nativo and Carzeb completely inhibiting the growth of F. moniliformeinvitro condition at their low (2.5 gm/L) concentration. Efficacy of the fungicides reduced to some extent when the treated seeds were washed with fresh water except Bavistin. Maximum (85%) average germination was found in Bavistin and Greenzeb treated seeds. The promising fungicides further evaluated to control seedling infection at low (2.5 gm/L) concentration and resulted significant reduction of bakanae infected seedlings in pot soil and in seed bed.Bangladesh Rice j. 2015, 19(1): 49-55

Management Issues: Ethics and Clinical Productivity Pressures Under Managed Care

1997 ◽  
Vol 7 (3) ◽  
pp. 8-10 ◽  
Author(s):  
Becky Sutherland-Cornett ◽  
Bernard P. Henri ◽  
Brooke Hallowell
Keyword(s):  
Managed Care ◽  
Management Issues

Elemental chlorine-free bleaching of North American hardwood kraft pulps: Evaluation of oxidant-reinforced extraction variables on overall bleaching optimization

TAPPI Journal ◽  
2013 ◽  
Vol 12 (10) ◽  
pp. 33-41 ◽  
Author(s):  
BRIAN N. BROGDON
Keyword(s):  
Response Surface ◽  
Chlorine Dioxide ◽  
North American ◽  
Yield Loss ◽  
Alkaline Extraction ◽  
Kraft Pulps ◽  
Pulp Bleaching ◽  
Response Surface Models ◽  
Elemental Chlorine ◽  
Surface Models

This investigation evaluates how higher reaction temperatures or oxidant reinforcement of caustic extraction affects chlorine dioxide consumption during elemental chlorine-free bleaching of North American hardwood pulps. Bleaching data from the published literature were used to develop statistical response surface models for chlorine dioxide delignification and brightening sequences for a variety of hardwood pulps. The effects of higher (EO) temperature and of peroxide reinforcement were estimated from observations reported in the literature. The addition of peroxide to an (EO) stage roughly displaces 0.6 to 1.2 kg chlorine dioxide per kilogram peroxide used in elemental chlorine-free (ECF) bleach sequences. Increasing the (EO) temperature by Δ20°C (e.g., 70°C to 90°C) lowers the overall chlorine dioxide demand by 0.4 to 1.5 kg. Unlike what is observed for ECF softwood bleaching, the presented findings suggest that hot oxidant-reinforced extraction stages result in somewhat higher bleaching costs when compared to milder alkaline extraction stages for hardwoods. The substitution of an (EOP) in place of (EO) resulted in small changes to the overall bleaching cost. The models employed in this study did not take into account pulp bleaching shrinkage (yield loss), to simplify the calculations.

Sign in / Sign up

Export Citation Format

Share Document