The effects of triazophos applied to transgenic Bt rice on the nutritional indexes, Nlvg expression, and population growth of Nilaparvata lugens Stål under elevated CO2

2015 ◽  
Vol 118 ◽  
pp. 50-57 ◽  
Author(s):  
Lin-Quan Ge ◽  
Yu-Cheng Sun ◽  
Fang Ouyang ◽  
Jin-Cai Wu ◽  
Feng Ge
Keyword(s):  
Population Growth ◽  
Elevated Co2 ◽  
Nilaparvata Lugens ◽  
Bt Rice ◽  
Nilaparvata Lugens Stål

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.

scholarly journals Effect of Nutrient Management on Population Growth of Brown Planthopper, Nilaparvata lugens (Stål)

2014 ◽  
Vol 17 (1-2) ◽  
pp. 38-48
Author(s):  
MM Rashid ◽  
M Jahan ◽  
KS Islam ◽  
MN Bari ◽  
SS Haque
Keyword(s):  
Population Growth ◽  
Soil Nitrogen ◽  
Nutrient Management ◽  
Insect Pest ◽  
Brown Planthopper ◽  
Dry Weight ◽  
Nilaparvata Lugens ◽  
Phosphorus Fertilization ◽  
High Potassium ◽  
Nilaparvata Lugens Stål

Brown planthopper (BPH), Nilaparvata lugens (Stål) is a major insect pest of rice in Bangladesh. Nutrient management in rice received little attention on BPH population. The present study evaluated the consequences of nitrogen (N), phosphorus (P) and potassium (K) application on population build up and weight of BPH in the laboratory and net-house at Entomology Division, Bangladesh Rice Research Institute. Three levels of soil nitrogen (0, 100, 200 kg N ha-1), phosphorus (0, 20, 40 kg P2O5 ha-1) and potassium (0, 60, 120 kg K2O ha-1) were compared for individual and combined effects. Interactions of N, P and K demonstrated no significant effect on population growth and weight of BPH. However, interaction of N and P showed significant effect on population growth of BPH. Fertilization with nitrogen increased population and dry weight of BPH. Phosphorus fertilization markedly increased the population growth while high potassium application decreased population build up and dry weight of BPH.DOI: http://dx.doi.org/10.3329/brj.v17i1-2.20900Bangladesh Rice j. 2013, 17(1&2): 38-48

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