scholarly journals Future scenarios of rice brown plant hopper Nilaparvata lugens (Stal.) under changing climate

2021 ◽  
Vol 23 (1) ◽  
pp. 74-81
Author(s):  
S. VENNILA ◽  
SHABISTANA NISAR ◽  
A. ISLAM ◽  
SANJAY SHARMA ◽  
P.S. SARAO ◽  
...  
Keyword(s):  
Tamil Nadu ◽  
Weather Conditions ◽  
Nilaparvata Lugens ◽  
Weather Variables ◽  
Growing Seasons ◽  
Monitoring Strategies ◽  
Sunshine Hours ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper ◽  
Maximum Minimum

Abundance of brown plant hopper (BPH) Nilaparvatalugens (Stål) (Delphacidae: Homoptera) is modulated by prevalent weather conditions of rice growing seasons and locations. Categorization of  BPH adults caught in light traps (nos/week/trap) into low, moderate and high and formulation of criteria accounting weather variables [maximum/ minimum/ mean temperature (ÚC), morning/evening/mean relative humidity (%), rainfall (mm) and sunshine hours (h/day) and wind speed (km/h)] during kharif of2011-16 for four locations viz., Ludhiana (Punjab), Chinsurah (West Bengal), Raipur (Chhattisgarh) and Aduthurai (Tamil Nadu) with associated rules for weather based BPH prediction. Validation of BPH predictions for kharif 2017 indicated 96, 87, 73 and 61% accuracies in respect of Aduthurai (TN), Raipur (CG), Ludhiana (PB) and Chinsurah (WB). Future weather based predictions of BPH based on climatic projections of representative concentration pathway (RCP) 4.5 for 2020, 2050 and 2080 indicated absence of high population at Chinsurah (WB) during all time periods of 2020-2080. Progressively reducing BPH abundance from past (2011) to all future periods was noticed at Aduthurai (TN). ‘High’ BPH from 2020 and beyond over 2011 and 2016 at Raipur (CG) and reducing ‘high’ but increasing ‘moderate’ category between 2020-2050 but the reverse in 2080 at Ludhiana (PB) were predicted indicating requirement of continued monitoring strategies put in place at these locations. The observed spatial variability of climate change influence on BPH implied a need for zonation mapping of rice insects including BPH for India.

scholarly journals Effects of elevated CO2 on resistant and susceptible rice cultivar and its primary host, brown plant hopper (BPH), Nilaparvata lugens (Stal)

2020 ◽  
Author(s):  
Sengottayan Senthil-Nathan
Keyword(s):  
Elevated Co2 ◽  
Insect Pests ◽  
Rice Cultivar ◽  
Nilaparvata Lugens ◽  
Carbon Accumulation ◽  
Rice Cultivars ◽  
Ambient Conditions ◽  
Primary Host ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

Abstract Elevated CO2 has positive response on plant growth and negative response on insect pests. As a contemplation, the feeding pattern of the brown plant hopper, Nilaparvata lugens Stål on susceptible and resistant rice cultivars and their growth rates exposed to elevated CO2 conditions were analyzed. The elevated CO2 treatment showed significant differences in percentage of emergence and rice biomass that were consistent across the rice cultivars, when compared to the ambient conditions. Similarly, increase in carbon and nitrogen ratio of leaves and alterations in defensive peroxidase enzyme levels were observed, but was non-linear among the cultivars tested. Lower survivorship and nutritional indices of N. lugens were observed in conditions of elevated CO2 levels over ambient conditions. Results were nonlinear in manner. We conclude that the plant carbon accumulation increased due to elevated CO2, causing physiological changes that decreased nitrogen content. Similarly, elevated CO2 increased insect feeding, but did not alter other variables such as their biology or reproduction.

Prediction and characterization of novel microRNAs from brown plant hopper,Nilaparvata lugens(Stål) (Hemiptera: Delphacidae)

2013 ◽  
Vol 43 (4) ◽  
pp. 224-235 ◽  
Author(s):  
R. Asokan ◽  
K.B. Rebijith ◽  
H.H. Ranjitha ◽  
H.K. Roopa ◽  
V.V. Ramamurthy
Keyword(s):  
Nilaparvata Lugens ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

scholarly journals Broadening Genetic Base of Rice and Identification of Pre-Breeding Lines for Resistance to Brown Plant Hopper, Nilaparvata lugens (Stål.)

2021 ◽  
pp. 76-80
Author(s):  
Prakash Chandra Rath ◽  
Lotan Kumar Bose ◽  
Nitiprasad Namdeorao Jambhulkar ◽  
Hata Nath Subudhi ◽  
Meera Kumari Kar
Keyword(s):  
Quantitative Traits ◽  
Basic Research ◽  
Nilaparvata Lugens ◽  
Hybrid Breeding ◽  
Breeding Lines ◽  
Qualitative And Quantitative ◽  
Glasshouse Condition ◽  
Nilaparvata Lugens Stål ◽  
Moderately Resistant ◽  
Brown Plant Hopper

Pre-breeding includes basic research to achieve wide crosses and facilitate the use of exotic materials or wild relatives for both qualitative and quantitative traits. The main objective is to provide breeders with more ‘attractive’ PGR that are easier to use, i.e. resistance sources in acceptable genetic background; or inbreeding tolerant forms of out crossing species for hybrid breeding. Forty seven pre-breeding lines were evaluated against Brown Plant Hopper under glasshouse condition over a period of two years (2018 and 2019). Out of these, two pre-breeding lines were moderately resistant to BPH having score 3. Two pre-breeding lines were moderately susceptible to BPH having score 5, five lines were susceptible having score 7 and rest thirty nine pre-breeding lines were highly susceptible to BPH with a score of 9.

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