scholarly journals Seasonal Abundance of Brown Plant Hopper, Nilaparvata lugens (Stal) in Rice and Correlation of Abiotic Factors Under Pune Region

2021 ◽  
Vol 10 (10) ◽  
pp. 108-117
Author(s):  
Amruta Deshmukh S. B. Kharbade ◽  
N. D. Tamboli V. A. Sthool ◽  
S. V. Bagade
Keyword(s):  
Agricultural Research ◽  
Abiotic Factors ◽  
Nilaparvata Lugens ◽  
Seasonal Abundance ◽  
Maximum Temperature ◽  
Research Station ◽  
Rice Varieties ◽  
Positive Correlation ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

An agro-meteorological investigation was undertaken on “Crop weather pest relationship and validation of DSSAT model for rice varieties under different transplanting dates’’ during kharif, 2016 and 2017 at Agricultural Research Station Farm, Vadgaon Maval, Dist. Pune, under Mahatma Phule Krishi Vidyapeeth, Rahuri, University. An experiment was laid out in split plot design with three replications. The treatment comprised of four sowing dates viz., S1 : 26th MW (25 June-1 July), S2 : 28th MW (9 July-15 July), S¬3 : 30 MW (23 July-29 July) and S4 : 32nd MW (06 August -12 August) as main plot treatments and four varieties viz., V1: VDN-99-29 (Phule Samruddhi), V2 : VDN-3-51-18 (Indrayani), V3 : IET-13549 (Bhogavati) and V4 : RDN-99-1 (Phule Radha) as sub plot treatments. Average number of brown plant hopper showed highly significant positive correlation with maximum temperature (0.902**, 0.627**), positive correlation with morning humidity (0.534, 0.789*), evening humidity (0.678*, 0.551) and bright sunshine hours (0.345, 0.483). While minimum temperature (-0.567, -0.543) and rainfall (-0.302, -0.307) showed negative correlation with brown plant hopper on 26th MW, 28th MW, 30th MW and 32nd MW transplanting dates. During both the years of 2016 and 2017, respectively.

scholarly journals Determination of brown planthopper resistant genes in some rice varieties by molecular markers

2016 ◽  
Vol 14 (2) ◽  
pp. 261-269
Author(s):  
Nguyễn Thị Kim Liên ◽  
Nguyễn Huy Hoàng ◽  
Lê Bắc Việt ◽  
Phan Thị Bích Thu ◽  
Nguyễn Huy Chung
Keyword(s):  
Molecular Markers ◽  
Resistance Genes ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Rice Varieties ◽  
Genomic Platform ◽  
The One ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

Brown plant hopper (Nilaparvata lugens Stal.) is the one of dangerous pests for rice that were reported in most of rice growing countries. Twenty seven BPH resistance genes have been detected in cultivated and wild rice. However, each resistance gene is able to resist with only strain or certain biotype. Besides, many studies indicated that the toxicity of BPH strains tend to change and loss the resistance of rice lines. The breeding of rice varieties that resist to many BPH biotypes is being the breeders towards. With helping of the development of molecular markers and genetic engineering, the breeders are hopping to identify the molecular markers that linked tightly with BPH resistance genes and develop the rice varieties can gather many resistance genes in a well genomic platform. In this study, we assessed the resistance of rice lines of Vietnam and imported rice lines. The resistance was ditermined by using assessement method in the galvanized box and molecular markers linkage with resistance genes (Bph1, bph2, Bph3, Bph9 and Bph17). The results showed that there was a high affinity between the two methods with 70.59% and 86.27% of lines that have the resistance (respectively). Among of 51 surveyed rice lines, 44 lines (86.27%) were determined to have at least one marker linkage with resistance genes. 19 lines (37.25%) harbored two or three markers linkage with resistance genes. These lines will be a good genetic resource for screening and breeding the resistant rice varieties.

scholarly journals Impact of abiotic factors on build-up of citrus psylla, Diaphorina citri Kuwayama population in Punjab, India

2014 ◽  
Vol 6 (2) ◽  
pp. 371-376 ◽  
Author(s):  
Hijam S. Devi ◽  
D. R. Sharma
Keyword(s):  
Relative Humidity ◽  
Disease Transmission ◽  
Minimum Temperature ◽  
Abiotic Factors ◽  
Winter Season ◽  
Seasonal Abundance ◽  
Maximum Temperature ◽  
Weak Links ◽  
Diaphorina Citri ◽  
Citrus Psylla

Seasonal abundance of citrus psylla (Diaphorina citri) Kuwayama was studied on Kinnow mandarin under Punjab conditions during 2012 and 2013. Population of D. citri was present throughout the year but only adults found surviving during December and February. There was no nymphal population when maximum temperature was > 39°C or < 7°C. Two population peaks of nymphs wer e observed, first in April-May and second in August- September. Thereafter, there was abrupt decline in nymphal population during June and July during both the years when the weather conditions i.e. maximum, minimum temperature (°C), relative humidity (%), rainfall (m m) and sunshine (hrs) ranged from 24.4-44, 22.4-31.8, 25.5-100, 0-108.0 and 0-13.5, respectively. Highest peaks of adult were found during May followed by June. With the decrease in temperature from the end of September, the population of D. citri started to decrease and reached its lowest during winter season. Correlation analysis for both the years indicated that maximum and minimum temperature, sunshine and rainfall were positively correlated with nymphal, adult and mixed population but the effect of rainfall on adult population was non-significant, while relative humidity was negatively correlated. The study is useful to find out the weak links of psyllid populations in relation to abiotic factors and that could be exploited to curb its infestation and disease transmission.

scholarly journals Response of Rice Varieties to Age of Seedlings and Transplanting Dates

1970 ◽  
pp. 14-17
Author(s):  
Mishri L Shah ◽  
Rambaran Yadav
Keyword(s):  
Grain Yield ◽  
Interaction Effect ◽  
Management Practices ◽  
Agricultural Research ◽  
Research Station ◽  
Rice Grain ◽  
Rice Varieties ◽  
Research Journal ◽  
Key Words Age ◽  
Similar Yield

A field experiment was conducted at Regional Agricultural Research Station, Parwanipur in 1998/99 and 1999/00 with an aim to find out the alternate management practices to compensate the loss in the grain yield due to flood. Irrespective of the varieties and transplanting dates, age of seedlings had no effect on grain yield of rice. But transplanting dates had significant effect on grain and grain contributing characters. The yield of rice transplanted at 1 Sept was 25.6 and 37.5% less in 1998/99 and 1999/00 respectively as compared to rice grain yield of 14 July transplanting. Radha 11 registered the highest grain yield of 4086 kg ha-1 in 1999/00 and 2662 kg ha-1 in 1998/99, which was at par to the yield obtained by Sabitri at the same year. The interaction effect of the age of seedlings, transplanting dates and varieties were found significant in both the years. 25 days old seedlings transplanted on 14 July in 1999/00 of rice varieties Masuli and Radha 11, produced statistically the similar yield. Radha 11 was the best among the tested varieties. 25 days old seedlings of Masuli, Basmati, Sabitri and Radha 11 can be recommended to transplant as late as Sept 1 .Key words: Age of seedlings; Rice; Transplanting datesDOI: http://dx.doi.org/10.3126/narj.v4i0.4858Nepal Agriculture Research Journal Vol. 4&5, 2001/2002Page: 14-17Uploaded date: 7 June, 2011

Feeding responses of the brown planthopper, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae), to resistant and susceptible host-plants

1989 ◽  
Vol 79 (2) ◽  
pp. 309-318 ◽  
Author(s):  
D. E. Padgham ◽  
S. Woodhead ◽  
H. R. Rapusas
Keyword(s):  
Resistance Genes ◽  
Host Plants ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Resistance Mechanisms ◽  
Population Development ◽  
Rice Varieties ◽  
Susceptible Host ◽  
Insect Activity ◽  
Nilaparvata Lugens Stål

AbstractThe feeding responses, growth and population development of Nilaparvata lugens (Stål) are quantified on a range of twelve susceptible or resistant host-plants. Paris of rice varieties carrying the Bph1, bph2 and Bph3 resistance genes are compared as hosts for N. lugens, and it is concluded that such notations do not adequately describe the diversity of plant resistance mechanisms. Evidence is presented for resistance mechanisms involving enhanced insect activity and gustatory responses to unacceptable phloem.

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