Transgeniccry1Corcry2Arice has no adverse impacts on the life-table parameters and population dynamics of the brown planthopper,Nilaparvata lugens(Hemiptera: Delphacidae)

2014 ◽  
Vol 71 (7) ◽  
pp. 937-945 ◽  
Author(s):  
Zeng-Bin Lu ◽  
Yu-E Liu ◽  
Nai-Shun Han ◽  
Jun-Ce Tian ◽  
Yu-Fa Peng ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Life Table ◽  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Life Table Parameters ◽  
Adverse Impacts

scholarly journals Cry1C rice doesn’t affect the ecological fitness of rice brown planthopper, Nilaparvata lugens either under RDV stress or not

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Xuefei Chang ◽  
Linlin Sun ◽  
Duo Ning ◽  
Cong Dang ◽  
Hongwei Yao ◽  
...  
Keyword(s):  
Brown Planthopper ◽  
Oviposition Preference ◽  
Nilaparvata Lugens ◽  
Commercial Production ◽  
Infection Status ◽  
Rice Dwarf Virus ◽  
Abiotic And Biotic Stress ◽  
Life Table Parameters ◽  
Ecological Fitness ◽  
Potential Risks

Abstract The potential risks of Bt rice on non-target arthropods (NTAs) should be evaluated and defined before commercial production. Recently, effects of Bt rice on NTAs under abiotic and biotic stress conditions attracted much attention. Here we reported the effects of Bt rice T1C-19 (Cry1C rice) on the non-target herbivore, Nilaparvata lugens (rice brown planthopper, BPH) with or without RDV (rice dwarf virus) infection conditions. BPH showed no feeding and oviposition preference between Bt rice T1C-19 and its non-Bt parental rice Minghui 63 (MH63), as well as between RDV-infected and RDV-free rice plants. Meanwhile, rice type, RDV infection status, and their interaction had little impacts on the survival, development and fecundity of BPH. By comparison with non-Bt control, Bt rice T1C-19 with or without RDV infection had no significant effects on the life-table parameters of BPH including rm, R0, T, DT and λ. Thus, it could be concluded that Bt rice T1C-19 doesn’t affect the ecological fitness of BPH either under RDV stress or not.

scholarly journals Seasonal variation in population and biochemical contents of brown planthopper, Nilaparvata lugens (Stål)

2022 ◽  
Vol 43 (1) ◽  
pp. 52-58
Author(s):  
S. Narayana ◽  
◽  
S. Chander ◽  
S. Doddachowdappa ◽  
S. Sabtharishi ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Rainy Season ◽  
Brown Planthopper ◽  
Chemical Compounds ◽  
Nilaparvata Lugens ◽  
Water Soluble ◽  
Soluble Carbohydrates ◽  
Water Soluble Carbohydrates ◽  
Nilaparvata Lugens Stål ◽  
Brown Plant Hopper

Aim: The present study was undertaken on population dynamics and estimation of protein, water-soluble carbohydrates and glycogen contents in the brown planthopper, Nilaparvata lugens to explore their migratory behaviour. Methodology: Brown planthopper populations were monitored and collected using sweep nets from 23rd standard meteorological week (SMW) to 47th SMW during 2017 and 2018 rainy seasons to understand population dynamics of the pest. The protein, water-soluble carbohydrates and glycogen contents were estimated from the pest samples collected during 36th to 44th SMW in 2017 and 2018 rainy seasons. Results: Brown planthopper population were not observed in rice farm during 23rd SMW to 28th SMW during two years of study. However, macropterous form of the pest first appeared in the farm during 29th SMW and peaked during 43rd SMW. Thereafter, population declined and disappeared after 47th SMW during both the years. Water-soluble carbohydrates and glycogen contents varied significantly different weeks which remained low during 36th-39th SMW, however, increased gradually towards the end of the rainy season 2017 and 2018. On the other hand, protein content significantly varied among different weeks unlike the trend of water-soluble carbohydrates and glycogen. Interpretation: The study revealed the absence of brown plant hopper during summer season preceding rainy season, and the accumulation of bio-chemical compounds towards the end of rainy season under Delhi environment is perhaps suggestive of migration of the pest from unknown areas during rainy season to Delhi and likely preparedness of the pest for emigration to safer areas from Delhi, respectively.

scholarly journals A laboratory and field condition comparison of life table parameters of Aphis gossypii Glover (Hemiptera: Aphididae)

2015 ◽  
Vol 55 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Behnaz Hosseini-Tabesh ◽  
Ahad Sahragard ◽  
Azadeh Karimi-Malati
Keyword(s):  
Population Dynamics ◽  
Relative Humidity ◽  
Life Table ◽  
Aphis Gossypii ◽  
Field Conditions ◽  
Life Table Parameters ◽  
Laboratory Conditions ◽  
Rate Of Increase ◽  
Aphis Gossypii Glover ◽  
Field And Laboratory Conditions

Abstract Life table studies are essential tools for understanding population dynamics. The life table parameters of Aphis gossypii Glover (Hemiptera: Aphididae) feeding on the host plant, Hibiscus syriacus L. were studied under laboratory (25±1°C and relative humidity of 65±5% and a photoperiod of 16L : 8D h) and field conditions (23-43°C, and relative humidity of 27-95%). The data were analysed using the age-stage, two-sex life table theory. The life table studies were started with 50 and 40 nymphs in laboratory and field conditions, respectively. Under laboratory conditions, A. gossypii reared on H. syriacus had a higher survival rate, fecundity, and longevity than those reared under field conditions. When reared under field conditions, A. gossypii had a longer nymphal developmental time, shorter adult longevity, and lower fecundity than those reared under laboratory conditions. The intrinsic rate of increase (r), net reproductive rate (R0), and the finite rate of increase (λ) under laboratory conditions, were higher than those obtained under field conditions. Nevertheless, there were no significant differences in the mean generation time T (days) between field and laboratory conditions. In the present study, the results clearly showed that life table parameters of A. gossypii were significantly different under field and laboratory conditions. These results could help us to understand the A. gossypii population dynamics under field conditions. The results could also help us make better management decisions for economically important crops

Screening of rice genotypes for resistance to the brown planthopper, Nilaparvata lugens Stål

2012 ◽  
Vol 40 (4) ◽  
pp. 502-508 ◽  
Author(s):  
M. P. Ali ◽  
Salem S. Alghamdi ◽  
M. A. Begum ◽  
A. B. M. Anwar Uddin ◽  
M. Z. Alam ◽  
...  
Keyword(s):  
Brown Planthopper ◽  
Nilaparvata Lugens ◽  
Rice Genotypes
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