Assessment of grain discoloration in the main rice genotypes of Corrientes Province, Argentina

ABSTRACT Rice grain discoloration affects grain yield and quality. Corrientes is the main rice producing province in Argentina. Previous studies were carried out in this province, where only panicle incidence (PI) was evaluated. In view of the need to obtain more agronomic parameters to more exhaustively investigate the effects caused by this disease, the present study was carried out to evaluate panicle incidence (PI), percentage of discolored grains per panicle (GD), weight loss (WL), disease severity index (DSI) and sterility (S) in eight rice genotypes. Although PI and GD are estimated as disease incidence, both were significantly different. GD is obtained by the grain-by-grain evaluation, while PI considers a panicle diseased when the latter presents at least one spotted grain; thus, this last method overestimates the disease incidence. The genotype IRGA 424 recorded maximum and minimum GD and S values, which may be explained by different sowing dates in different regions in the province, with their corresponding environmental conditions during the critical period of the infection and during spikelet formation. WL and DSI had lower values than those reported by other authors, which indicates that the effects of rice grain discoloration on these parameters in Corrientes Province, Argentina, are less severe than in other rice cultivating countries.

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ABNORMAL FLOWER AND GRAIN 1 encodes OsMADS6 and determines palea identity and affects rice grain yield and quality

Science China Life Sciences ◽

10.1007/s11427-019-1593-0 ◽

2020 ◽

Vol 63 (2) ◽

pp. 228-238 ◽

Cited By ~ 3

Author(s):

Xiaoqi Yu ◽

Saisai Xia ◽

Qiankun Xu ◽

Yuanjiang Cui ◽

Ming Gong ◽

...

Keyword(s):

Grain Yield ◽

Rice Grain ◽

Abnormal Flower ◽

Yield And Quality ◽

Grain Yield And Quality

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Resistance of standing milkvetch (Astragalus adsurgens) varieties to Embellisia astragali

Crop and Pasture Science ◽

10.1071/cp12107 ◽

2012 ◽

Vol 63 (4) ◽

pp. 351 ◽

Cited By ~ 2

Author(s):

B. H. Yu ◽

Z. B. Nan ◽

Y. Z. Li ◽

H. L. Lin

Keyword(s):

Disease Severity ◽

Field Experiments ◽

Agronomic Traits ◽

Disease Incidence ◽

Dry Weight ◽

Severity Index ◽

Field Conditions ◽

Disease Severity Index ◽

Greenhouse Experiments ◽

Astragalus Adsurgens

Yellow stunt and root rot caused by Embellisia astragali are major factors contributing to declining yields of standing milkvetch (Astragalus adsurgens). The resistance of ten varieties of standing milkvetch to E. astragali was evaluated under laboratory, greenhouse, and field conditions. Seed germination/emergence, shoot and root length, plant dry weight, disease incidence, mortality, and disease severity index were monitored. The results show that Shanxi and Zhongsha No. 1 varieties had the best agronomic traits and lowest levels of disease in all experiments, while the varieties Neimeng and Ningxia had the highest susceptibility to disease. Germination/emergence differed significantly (P < 0.05) between varieties after inoculation, and compared with the control, germination/emergence of inoculated treatments of nine varieties decreased on average by 1.5% in laboratory experiments and by 4.1% in greenhouse experiments at 15 days after inoculation. Inoculation reduced shoot length by an average of 24.4% and 41.5% (P < 0.05) in laboratory and greenhouse experiments, respectively, in six of ten varieties. All varieties showed significantly (P < 0.05) lower plant dry weight following inoculation, with reductions ranging from 0.3 to 0.6 mg in the laboratory and from 82.6 to 149.4 mg in the greenhouse. Resistance to the pathogen was evaluated on the basis of disease incidence, a disease severity index (DSI), and mortality; varieties showing different resistance were grouped using cluster analysis. There were significant correlations between the results of laboratory and greenhouse experiments (r = 0.79; P < 0.01) and between greenhouse and field experiments (r = 0.83; P < 0.01) across all varieties. Multiple regression analysis between laboratory/greenhouse and field experiments on DSI suggested that screening in the laboratory/greenhouse could be an alternative method of rapidly estimating DSI under field conditions.

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Effect of fungicide combinations for FHB control on disease incidence, grain yield and quality of winter wheat, spring wheat and barley

Canadian Journal of Plant Science ◽

10.1139/cjps-2017-0001 ◽

2017 ◽

Cited By ~ 1

Author(s):

Claude D Caldwell ◽

Douglas Macdonald ◽

Yunfei Jiang ◽

Mumtaz Cheema ◽

Jili Li

Keyword(s):

Winter Wheat ◽

Grain Yield ◽

Spring Wheat ◽

Disease Incidence ◽

Yield And Quality ◽

Grain Yield And Quality

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Harmonizing sowing dates with onset of rains to guarantee nutri-millets grain yield and quality under rain dependent farming

Journal of University of Shanghai for Science and Technology ◽

10.51201/jusst/21/09683 ◽

2021 ◽

Vol 23 (09) ◽

pp. 1263-1269

Author(s):

Deepika R ◽

◽

Swaminathan C ◽

Kannan P ◽

Sathyamoorthy NK ◽

...

Keyword(s):

Grain Yield ◽

Crop Production ◽

Arid Regions ◽

Block Design ◽

Arid Environments ◽

Current Season ◽

Yield And Quality ◽

Sowing Dates ◽

Grain Yield And Quality ◽

Semi Arid

Nutri-millets offer copious micronutrients like vitamins, beta-carotene etc. In this present day, all the millets are amazingly superior and are therefore, the result for the malnutrition and obesity that affects a vast majority of the Indian population. They have numerous beneficial properties like drought resistant, good yielding in areas where water is limited and they possess good nutritive values. The prospective water scarcity in semi-arid regions disturbs both normal as well as managed environments, which limits the cultivation of crops, fodder, and other plants. The issues faced by the rain-dependent farming of these semi-arid regions are primarily the unpredictability of the monsoon. Probability analysis of rainfall events are believed to contribute in deciding sowing dates for the current season and for successful crop production in semi-arid environments. The present study was carried out in semi-arid condition to quantify the performance of nutri-millets in the rain dependent farming. The experiment was laid out under factorial randomized block design with 3 replications. The treatments comprises of crop factor viz., Sorghum [Sorghum bicolor (L.) Moench] (C1) and, little millet [Panicum sumatrense Roth ex Roem. & Schult] (C2) and sowing window factor viz., sowing based farmer’s practice (M1) i.e. on 31st standard meteorological week (SMW); Sowing at 33rd SMW based on 50% rainfall probability (M2); Sowing at 38th SMW based on 75% rainfall probability (M3), Sowing window as per the current weather forecast, for this season on 35th SMW (M4).It is evident from the study that Sowing sorghum at 38th standard meteorological week based on 75% rainfall probability recorded higher grain yield, rain water use efficiency with elevated iron and calcium content. This shows that different sowing dates have significant influence on grain yield and quality of nutri-millets.

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Wilt and Root Diseases of Asclepias tuberosa L.

Plant Disease ◽

10.1094/pdis.1997.81.10.1203 ◽

1997 ◽

Vol 81 (10) ◽

pp. 1203-1205 ◽

Cited By ~ 1

Author(s):

L. Tsror (Lahkim) ◽

M. Hazanovski ◽

O. Erlich ◽

N. Dagityar

Keyword(s):

Disease Severity ◽

Disease Incidence ◽

Severity Index ◽

Disease Severity Index ◽

Dry Rot ◽

First Report ◽

Binucleate Rhizoctonia ◽

Root Diseases ◽

Tuberous Roots

Chlorosis and wilting, followed by weak flowering or death, have been occurring in Asclepias tuberosa plants grown in Israel. Roots have been rotted and tuberous roots have shown dark lesions, sometimes with sclerotia. A binucleate Rhizoctonia sp. was detected on 39% and Pythium intermedium on 23% of diseased samples. Other organisms were less prevalent. Wilting began 7 days after seedlings were inoculated with P. intermedium or the binucleate Rhizoctonia sp. or both, with disease incidence ranging from 25 to 65% and disease severity index ranging from 0.30 to 0.85 (scale of 0 to 3). Healthy tuberous roots inoculated with the binucleate Rhizoctonia sp. exhibited dry rot within 4 to 7 days, and irregular black sclerotia of the pathogen were present 2 weeks later. This is the first report of either a binucleate Rhizoctonia sp. or P. intermedium occurring in A. tuberosa.

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Drought Stress Impairs Grain Yield and Quality of Rice Genotypes by Impaired Photosynthetic Attributes and K Nutrition

Rice Science ◽

10.1016/j.rsci.2019.12.001 ◽

2020 ◽

Vol 27 (1) ◽

pp. 5-9 ◽

Cited By ~ 3

Author(s):

Muhammad Zahid Mumtaz ◽

Muhammad Saqib ◽

Ghulam Abbas ◽

Javaid Akhtar ◽

Zia Ul-Qamar

Keyword(s):

Drought Stress ◽

Grain Yield ◽

Yield And Quality ◽

Rice Genotypes ◽

Grain Yield And Quality ◽

Photosynthetic Attributes

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Effect of Cultural and Biological Treatments in Managing Clubroot Disease of Cabbage in Sidhuwa, Nepal

International Journal of Applied Sciences and Biotechnology ◽

10.3126/ijasbt.v7i1.23314 ◽

2019 ◽

Vol 7 (1) ◽

pp. 96-101

Author(s):

Ashish Ghimire ◽

Sundarman Shrestha

Keyword(s):

Disease Control ◽

Disease Severity ◽

Disease Incidence ◽

Block Design ◽

Combined Treatment ◽

Severity Index ◽

Disease Severity Index ◽

Effective Microorganisms ◽

Clubroot Disease ◽

Biological Treatments

The Plasmodiophora brassicae Woronin is an important soil pathogen that attacks brassicaceae family of plants. The ability of pathogen to survive in soil for many years as a resting structure even in the absence of suitable host has increased its threat by making it more devastating. Lower effectiveness of treatments applied so far and failure to completely eradicate the disease once it enters the field has posed more problems. The study was conducted at a disease infected field in Sidhuwa, Dhankuta. It was focused on the effectiveness of different cultural and biological treatments against clubroot disease under field conditions. The treatments; lime, combination of lime and vermicompost, Effective Microorganisms (EM) solution and Trichoderma viride were arranged in Randomized Complete Block Design and replicated four times. The yield and yield attributing parameters and clubroot scale were recorded at the time of harvest. Values like Disease Incidence, Disease Severity Index and Disease Control Percentage were calculated based on clubroot scale value. The treatments showed no significant influence on vegetative parameters of the plants and on disease incidence. However, the combined treatment of lime and vermicompost was found to be most effective regarding disease severity and disease control i.e. the least Disease Severity Index (31.25%) and highest Disease Control Percentage (50.94%) compared to the control were obtained from the combined treatment of lime and vermicompost. Effective Microorganisms showed the highest disease severity. The combination of lime and vermicompost used as a treatment yielded highest marketable head weight (1.779 kg) and head diameter (19.90 cm). Int. J. Appl. Sci. Biotechnol. Vol 7(1): 96-101

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An Investigation on Disease Incidence, Grain Yield and Quality of BRRI Dhan29 in Bangladesh

International Journal of Applied Sciences and Biotechnology ◽

10.3126/ijasbt.v4i3.15151 ◽

2016 ◽

Vol 4 (3) ◽

pp. 311-317

Author(s):

Md. Mahbubul Alam ◽

Muhammad Abdus Sobahan ◽

Nasima Akter ◽

Ismail Hossain

Keyword(s):

Grain Yield ◽

Disease Incidence ◽

Sheath Blight ◽

Brown Spot ◽

Curvularia Lunata ◽

Yield And Quality ◽

Infection Index ◽

Grain Yield And Quality ◽

Dough Stage

Rice crops are susceptible to disease, which causes large yield losses in many Asian countries. The influence of disease incidence and severity on grain yield and quality of the rice (Oryza sativa L., cv. BRRI dhan29) was investigated in three different locations of Chief Farm Superintendent’s (CFS) farm viz. Near Weather Yard (location-1), Near Agronomy Farm (location-2) and Near CFS farm office (location-3), Bangladesh Agricultural University (BAU), mymensingh, Bangladesh during boro season. In location-1, both brown spot and sheath blight were recorded whereas in location-2 and in location-3 only brown spot was recorded. Severity of brown spot was lowest at the location-1 and the highest at the location-3. Combined incidence of brown spot and sheath blight decreased the yield considerably whereas brown spot did not alone. Maximum severity of sheath blight was observed both in flowering and soft dough stage and minimum at maximum tillering stage. The lowest infection index of brown spot was obtained at maximum tillering stage and the highest infection index was obtained at soft dough stage whereas maximum and minimum infection index of sheath blight of rice were recorded at soft dough stage and maximum tillering stage, respectively. Aparently healthy seeds, spotted seeds, discoloured seeds, deformed seeds and chaffy grains were found among the three locations. Germination percentage was highest in healthy seeds compared to other category seeds. Alternaria padwickii, Alternaria tenuis, Bipolaris oryzae, Curvularia lunata and Fusarium semitectum were found to be associated with the seed. The highest and lowest occurrence of A. padwickii, A. tenuis, B. oryzae, C. lunata were recorded from chaffy grains and from healthy seeds, respectively. It is suggest that disease incidence and severity was gradually increased with the age of the plant and reduced yield and quality of BRRI dhan29. Int J Appl Sci Biotechnol, Vol 4(3): 311-317

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