scholarly journals Effect Of NPK On The Incidence Of Alternaria Leaf Blight Of Mustard

1970 ◽  
Vol 36 (3) ◽  
pp. 407-413 ◽  
Author(s):  
F Khatun ◽  
MS Alam ◽  
MA Hossain ◽  
S Alam ◽  
PK Malaker
Keyword(s):  
Field Study ◽  
Disease Severity ◽  
Seed Yield ◽  
Nutrient Management ◽  
Disease Incidence ◽  
Leaf Blight ◽  
Recommended Dose ◽  
Soil Test ◽  
Alternaria Leaf Blight ◽  
Macro Nutrients

A 2-year field study was carried out to find out the effect of three macro nutrients NPK on the severity of Alternaria leaf blight and yield of mustard. Nitrogen @ 80, 100, 120, 140, and 160, phosphorus @ 15, 30, and 45, and potassium @ 30, 60, and 90 kg/ha were applied. Among the nutrients, 120-30- 60 kg NPK/ha was considered as recommended dose on the basis of soil test. Fertilizer dose 120-30-90 kg/ha appeared to be the best combination of N, P, and K in reducing the disease incidence and to increase seed yield of mustard. Higher dose of K (90 kg/ha) decreased the incidence of Alternaria leaf blight but higher dose of nitrogen (140 and 160 kg N/ha) increased the disease incidence. The highest seed yield of 1718 kg/ha was obtained with 120-30-90 kg of NPK/ha which was statistically similar to the doses of 120-30-60 and 120-45- 60 kg of NPK/ha. Higher seed yield and lower disease severity was also observed under these three treatments as compared to other treatments. Keywords: Mustard; Alternaria leaf blight; nutrient management. DOI: http://dx.doi.org/10.3329/bjar.v36i3.9269 BJAR 2011; 36(3): 407-413

scholarly journals Influence of weather parameters on alternaria leaf blight severity of makhana under the agro-climate of Koshi region of Bihar

2021 ◽  
Vol 23 (1) ◽  
pp. 54-59
Author(s):  
SANTOSH KUMAR ◽  
MD. NADEEM AKHTAR ◽  
SANTOSH KUMAR ◽  
MAHESH KUMAR ◽  
TRIBHUWAN KUMAR
Keyword(s):  
High Temperature ◽  
Relative Humidity ◽  
Disease Severity ◽  
Infection Process ◽  
Leaf Blight ◽  
Alternaria Leaf Blight ◽  
Weather Parameters ◽  
Maximum Temperatures ◽  
Blight Disease ◽  
Cent Disease

Weather parameters play a pivotal role in the infection process and spread of pathogen. It also influences the expression of susceptibility/resistance of the host plant during post-infection phases. Therefore, an experiment was conducted for two consecutive cropping seasons (2018 &2019) to study the influence of weather parameters such as temperature, humidity, rainfall and wind direction on the emergence of alternaria leaf blight of makhana in Koshi region of Bihar. Maximum per cent disease severity of alternarialeaf blightwas observed during the peak monsoon months (June to August). Highest disease severity of leaf blight (14.80% & 15.7%) was observed in the mid June during crop season, 2018 and 2019. High temperature (36.9oC & 38.1oC), and relative humidity (94% & 96.4%) of both the year 2018 and 2019 were found correlated with higher severity to alternaria leaf blight. Similarly average HTR values (3.1) were also found correlated with the average high temperature and relative humidity of both years (2018 and 2019) in terms of severity of leaf blight disease. Maximum temperatures, relative humidity and rainfall exhibited strong positive linear relationship and influenced the occurrence of alternaria leaf blight disease significantly. We also developed a geo-phytopathological model for the prediction of alternaria leaf blight disease of makhana on the basis of congenial mean temperature and relative humidity.

scholarly journals Assessing Taro (Colocasia esculenta (L.) Schott) Leaf Blight Incidence, Severity, and Farmers’ Knowledge of the Disease in Fako Division of Cameroon

2020 ◽  
pp. 17-29
Author(s):  
Mandah Cicelia Takor ◽  
Ekwa Yawa Monono ◽  
Ojong Agbor Ntane ◽  
Jemimah Evenye Ngale ◽  
Lum A. Fontem
Keyword(s):  
Disease Severity ◽  
Disease Incidence ◽  
Management Strategies ◽  
Leaf Blight ◽  
Cultural Methods ◽  
Randomized Design ◽  
High Prevalence ◽  
Severity Of The Disease ◽  
Blight Disease ◽  
Taro Leaf Blight

Taro leaf blight (TLB), a major disease of taro plant caused by Phytophthora colocasiae, a pseudo-fungus, that occurs in many taro producing areas, especially in the South West of Cameroon. A Survey was conducted to assess farmers’ knowledge, as well as to determine the incidence and the severity of the disease in taro fields. Structured questionnaires were administered in selected locations (Bokova, Ekona, Muea, Mile 16, Mutengene, and Likomba) of taro production. Two farms were selected with two quadrats of 64 m2 each were carved to assess disease incidence and severity on taro. The number of plants infected with taro leaf blight were counted and the area of the affected leaves measured was used to evaluate the disease incidence and disease severity. Data collected were subjected to ANOVA for complete randomized design and the means were compared using Tukey test at 0.05 probability levels. The results revealed that most of the farmers could identify the disease while practicing cultural methods in controlling the disease. The results also revealed significant differences (p = 0.001) in disease incidence and disease severity in all the localities, with Mile 16 showing the highest percentage mean of 96.53% and 85.59%, respectively. The severity scored showed high infection range of 3 – 3.95 in all locations except in Likomba (2.60).  It could be concluded from the results that there were high prevalence of taro leaf blight disease in Fako Division. Good management strategies are therefore required to control Taro leaf blight and improve taro production in the area.

scholarly journals An IPM Program for Managing Fungal Leaf Blight Diseases of Carrot in New York

Plant Disease ◽  
2007 ◽  
Vol 91 (1) ◽  
pp. 59-65 ◽  
Author(s):  
B. K. Gugino ◽  
J. E. Carroll ◽  
T. L. Widmer ◽  
P. Chen ◽  
G. S. Abawi
Keyword(s):  
New York ◽  
Disease Severity ◽  
Crop Rotation ◽  
Disease Incidence ◽  
Leaf Blight ◽  
Yield Reduction ◽  
Weather Forecasts ◽  
Alternaria Dauci ◽  
Leaf Blights ◽  
Cultivar Susceptibility

Fungal leaf blight diseases caused by Cercospora carotae and Alternaria dauci occur annually on processing carrot in New York, with growers applying up to eight fungicide sprays to manage these diseases. An integrated pest management (IPM) program involving the use of a 25% disease incidence threshold to prompt the first fungicide application and timing subsequent sprays by monitoring for increases in disease severity and weather forecasts in conjunction with a 10- to 14-day spray interval was evaluated in grower fields in 1997 and 1998. The IPM plots, compared with the grower plots, required two to six fewer fungicide applications but showed no yield reduction. From 1999 to 2004, the IPM program was validated and the effect of crop rotation and carrot cultivar susceptibility also were assessed. Carrot plants growing in fields with 2-year or longer crop rotation intervals reached the 25% disease incidence threshold later in the season and required fewer fungicide applications. The less-susceptible carrot cultivars also reached the 25% disease incidence threshold later, required fewer fungicide applications, and were less severely diseased than more susceptible cultivars. Validation of the IPM program in New York showed that both fungal leaf blights can be managed effectively using a 25% incidence threshold to prompt the first fungicide spray and making the subsequent fungicide applications based on increases in disease severity, weather forecasts, and a 10- to 14-day spray interval.

scholarly journals Integrated Nutrient Management on Soybean in a Coastal Charland of Bangladesh

2017 ◽  
Vol 20 (1) ◽  
pp. 77-83
Author(s):  
ISM Farhad ◽  
MA Rahman ◽  
E Jahan ◽  
MG Azam ◽  
NR Khan
Keyword(s):  
Seed Yield ◽  
Nutrient Management ◽  
Block Design ◽  
Growth And Yield ◽  
Recommended Dose ◽  
Integrated Nutrient Management ◽  
Gross Margin ◽  
Plant Seeds ◽  
Randomized Complete Block Design ◽  
Glycine Max L

A field experiment was conducted at Char Jangalia under MLT site, Laxmipur, a coastal district of southern Bangladesh, during Rabi season of 2015-16 to evaluate the effect of integrated nutrient management on growth and yield performance of soybean (var. Glycine max L.). Six treatment combinations, viz. T1= Control, T2= Farmers practice (25-15 Kg NP ha-1, T3= 100% recommended dose (30-25-55 Kg NP ha-1, K), T4= 50 % recommended dose + 1.5 t ha-1 vermi compost, T5= 50 % recommended dose + 5 t ha-1compost and T6=50 % recommended dose + 1.2 kg ha-1 bio fertilizer were tested. The experiment was laid out in randomized complete block design with 3 replications. There were significant differences among the different treatment combinations in terms of yield and yield contributing characters. Integrated nutrient management with application of 50% of the recommended doses of urea, TSP, MoP, and biofertilizer (Bradyrhizobium) at the rate of 1.2 kg ha-1 significantly increased most of the parameters, such as the plant height, number of nodule per plant, pods per plant, seeds per pod and seed yield. The highest seed yield (2.93 t ha-1) was recorded from T6 while the lowest seed yield (1.83 t ha-1) was obtained from T1. The highest gross return (Tk.117200 ha-1) and gross margin (Tk. 71840 ha-1) was obtained from T6, whereas the lowest gross return (Tk. 70400 ha-1) and gross margin (Tk.27880 ha-1) was obtained from T1. The overall results indicated that the application of integrated nutrient management of a combination of bio fertilizer with 50% N-P-K (15- 12.5-27.5 Kg ha-1) of the recommended dose produced the maximum nodulation and seed yield of soybean in the southern coastal char land.Bangladesh Agron. J. 2017, 20(1): 77-83

scholarly journals Effects of Nozzle Type and Spray Pressure on Control of Alternaria Leaf Blight of Muskmelon with Chlorothalonil

Plant Disease ◽  
2001 ◽  
Vol 85 (10) ◽  
pp. 1081-1084 ◽  
Author(s):  
Daniel S. Egel ◽  
Philip Harmon
Keyword(s):  
Disease Control ◽  
Disease Severity ◽  
Leaf Blight ◽  
Hollow Cone ◽  
Alternaria Leaf Blight ◽  
Progress Curve ◽  
Yield Responses ◽  
Similar Decrease ◽  
Affect Disease Severity ◽  
Nozzle Type

Methods of fungicide application were evaluated for their influence on the chemical control of Alternaria leaf blight of muskmelon in 1997, 1998, and 1999. Chlorothalonil was applied through either flat-fan or hollow-cone nozzles and with spray pressures ranging from 207 to 1,034 kPa. In all 3 years, unsprayed controls had significantly more disease than any of the sprayed treatments. There was no significant effect of nozzle type on disease severity or yield in any year. Spray pressures of 207, 414, or 620 kPa did not significantly affect disease severity or yield in 1997. In 1998, the 827-kPa pressure significantly lowered disease severity compared with the 207-kPa and 414-kPa pressures, but a similar decrease in the number of lesions per leaf did not occur. Yield responses in 1998 did not support a relationship between spray pressures and disease control. In 1999, spray pressure of 1,034 kPa did not significantly decrease the area under the disease progress curve as estimated from weekly ratings of the disease severity ratings or counts of lesions per leaf made on two dates. Results indicate no differences in disease control due to any of the application methods examined.

scholarly journals Effect of Inoculation of Plant Growth Promoting Rhizobacteria (PGPR) Mix I Formulations on Plant Growth, Yield, Disease Incidence and Disease Severity of Rhizoctonia Leaf Blight of Amaranthus (Amaranthus tricolor L.)

2021 ◽  
Author(s):  
A.R. Resmi ◽  
B. Lovely ◽  
A. Jayapal ◽  
G. Suja ◽  
N. Chitra
Keyword(s):  
Plant Growth ◽  
Disease Severity ◽  
Agricultural Research ◽  
Disease Incidence ◽  
Growth Yield ◽  
Plant Growth Promoting Rhizobacteria ◽  
Leaf Blight ◽  
Research Station ◽  
Plant Growth Promoting ◽  
Growth Promoting

Background: Amaranthus is the most popular and commercially cultivated leafy vegetable in the Southern part of India, especially Tamil Nadu and Kerala which is susceptible to a number of diseases. Among the different diseases affecting amaranth, foliar blight caused by Rhizoctonia solani Kuhn, is considered as the most serious disease in Kerala. Methods: A field experiment was taken up at Onattukara Regional Agricultural Research Station (O.R.A.R.S), Kayamkulam, Alappuzha, Kerala during December 2019 to February 2020 to assess the influence of dust and liquid formulations of Plant Growth Promoting Rhizobacteria (PGPR) mix I on growth, yield and disease incidence (Rhizoctonia leaf blight) in amaranthus. Result: The results of the study reveal that maximum number of leaves, number of branches per plant and yield were produced by the plants that were subjected to seedling root dip with 5% talc formulation followed by drenching with 5% talc solution at 30 DAT and 45 DAT. Regardless of talc or liquid formulation of PGPR mix I (2%) seedling dip followed by drenching at 15, 30 and 45 DAT provided the least disease incidence and disease severity in amaranthus at Onattukara condition. Hence use of PGPR mix I is a prerequisite for effective growth, yield and management of leaf blight of amaranthus at Onattukara.

scholarly journals Performance of summer sunflower (Helianthus annuus L.) hybrids under different nutrient management practices in coastal Odisha

2017 ◽  
Vol 9 (1) ◽  
pp. 435-440
Author(s):  
Sarthak Pattanayak ◽  
A. K. Behera ◽  
Priyanka Das ◽  
Manas Ranjan Nayak ◽  
S. N Jena ◽  
...  
Keyword(s):  
Field Experiment ◽  
Helianthus Annuus ◽  
Seed Yield ◽  
Management Practices ◽  
Nutrient Management ◽  
Recommended Dose ◽  
Oil Yield ◽  
College Of Agriculture ◽  
Stover Yield ◽  
Total Seed

The field experiment was conducted at Department of Agronomy, College of Agriculture, OUAT, Bhubaneswar during summer 2014 to find out appropriate hybrids and nutrient management practices for summer sunflower. Application of recommended dose of Fertiliser(RDF) i.e. 60-80- 60 kg N, P2O5-K2O ha -1 + ZnSO4 @ 25 kg ha -1 recorded the maximum capitulum diameter (15.60cm), seed yield (2.17 t ha -1 ), stover yield (4.88 t ha -1 ) and oil yield (0.91 t ha -1 ), while application of RDF + Boron@ 1 kg ha-1 recorded the highest number of total seed (970) and filled seed per capitulum (890) with the lowest unfilled seed (80) and sterility percentage (9.0%). The hybrid ‘Super-48’ recorded the highest seed and oil yield of 2.17 and 0.91 t ha -1 , respectively, at recommended dose of fertiliser + ZnSO4 @ 25 kg ha -1 . Experiment was conducted in evaluating the new hybrids in addition to evaluate the response of variety to different nutrient management practices.

scholarly journals Integrated Nutrient Management for Potatomungbean- T.Aman Rice Cropping Pattern Under Level Barind Agroecological Zone

2012 ◽  
Vol 36 (4) ◽  
pp. 711-722 ◽  
Author(s):  
MRA Mollah ◽  
Najrul Islam ◽  
MAR Sarkar
Keyword(s):  
Seed Yield ◽  
Nutrient Management ◽  
Tuber Yield ◽  
High Yield ◽  
Soil Test ◽  
Cropping Pattern ◽  
Plant Nutrient ◽  
Positive Effect ◽  
Moderate Yield ◽  
Agroecological Zone

A field experiment was conducted at the Multiplication Testing Site (MLT),  Joypurhat Sadar upazila with Potato- Mugnbean –T. Aman rice cropping pattern during November/2007 to November/2008 to verify different nutrient management approaches and to determine the economic dose of fertilizer for the said cropping pattern. The experiment was designed with five treatments for whole of the cropping pattern in a randomized complete block design with six replications. The treatments were, soil test based fertilizer dose for moderate yield goal, soil test based fertilizer dose for high yield goal, integrated plant nutrient management, farmers’ practice, and control. Cowdung was applied at the first crop potato only in the cropping sequence. The varieties for potato, mungbean and T. Aman rice were Diamant, BARI Mung-6, and BR11, respectively. The results demonstrated that the tuber yield of potato, seed yield  of mungbean, and grain yield of T. Aman rice were significantly influenced by the different treatments. The highest tuber yield (25.01 t/ha) was obtained from integrated plant nutrient management treatment. In mungbean, the highest seed yield (1384 kg/ha) was also recorded from NPKS for high yield goal with residual cowdung treatment. The results of NPKS application for high yield goal with residual cowdung had a positive effect on seed yield of mungbean. Grain and straw yields of T. Aaman rice were also significantly influenced by different treatments. The highest grain yield (5.68 t/ha) and straw yield (5.82 t/ha) were also observed in NPKS for high yield goal with residual cowdung treatment.  The results also indicated that the residual cowdung had a positive effect on grain and straw yields of T. Aman rice. Cost and return analysis of different nutrient management packages for the whole cropping pattern showed that the highest marginal benefit cost ratio (8.64), gross return (Tk. 3,79,960/ha) and gross margin (Tk. 3,43,360/ha) were obtained from integrated plant nutrient management treatment and the lowest from soil test based fertilizers for moderate yield goal treatment. So, considering crop productivity, economic return, and soil fertility, integrated plant nutrient management for high yield goal with 5 t/ha cowdung could be recommended for the Potato-Mungbean-T Aman rice cropping pattern at Joypurhat and similar soils of Level Barind agroecological zone for sustainable higher yield DOI: http://dx.doi.org/10.3329/bjar.v36i4.11761 Bangladesh J. Agril. Res. 36(4): 711-722, December 2011

scholarly journals Sustainability of productivity in rice-mustard sequential cropping system through integrated nutrient management for terai condition of Nepal

2013 ◽  
Vol 1 ◽  
pp. 113-122 ◽  
Author(s):  
B Mishra ◽  
RN Chaudhary
Keyword(s):  
Seed Yield ◽  
Nutrient Management ◽  
Cropping Systems ◽  
Cropping System ◽  
Recommended Dose ◽  
Dry Matter Accumulation ◽  
Integrated Nutrient Management ◽  
Yield Attributes ◽  
Maximum Benefit ◽  
Sequential Cropping

In absence of suitable cropping systems in terai, seed yield of mustard is decreasing. Farmers are growing mustard crop under energy starved condition and these are main reasons for low productivity of mustard. With a view to address these issues, an experiment on sustainability of productivity in rice-mustard sequential cropping system through integrated nutrient management for terai condition of Nepal was carried at Nawalpur, Sarlahi during 2004 – 2006. The result revealed that rice grown with 100% recommended dose of fertilizer and 10 tons compost /ha produced a maximum mean grain yield of 4371 kg/ha and straw yield of 5045.5 kg/ha which might be due to maximum dry matter accumulation. Likewise, it was exhibited that application of recommended dose of fertilizer with 10 t compost on preceding rice resulted in maximum seed yield of mustard (1259 kg/ha). The finding also showed that mustard grown with recommended dose of fertilizer produced a maximum mean seed yield of 1384 kg/ha. There was a positive effect of these treatments on seed yield attributes and seed yield of succeeding mustard. Economic analysis for the effects of treatments resulted a maximum benefit cost (BC) ratio of 2.0 which was obtained for mustard when grown after recommended dose of fertilizer. An encouraging BC ratio of 3.45 was found when mustard was taken with 100% recommended dose of fertilize (RDF). DOI: http://dx.doi.org/10.3126/ajn.v1i0.7551 Agronomy Journal of Nepal (Agron JN) Vol. 1: 2010 pp.113-122

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