scholarly journals Ecological fitness of brown planthopper, Nilaparvata lugens (Stål), to rice nutrient management

2017 ◽  
Vol 6 (1) ◽  
Author(s):  
Md. Mamunur Rashid ◽  
Mahbuba Jahan ◽  
Khandakar S. Islam ◽  
Md. Abdul Latif
2014 ◽  
Vol 17 (1-2) ◽  
pp. 38-48
Author(s):  
MM Rashid ◽  
M Jahan ◽  
KS Islam ◽  
MN Bari ◽  
SS Haque

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


PLoS ONE ◽  
2012 ◽  
Vol 7 (10) ◽  
pp. e47413 ◽  
Author(s):  
Jiranan Piyaphongkul ◽  
Jeremy Pritchard ◽  
Jeff Bale

2015 ◽  
Vol 105 (4) ◽  
pp. 390-398 ◽  
Author(s):  
P.-J. Wan ◽  
L. Yang ◽  
S.-Y. Yuan ◽  
Y.-H. Tang ◽  
Q. Fu ◽  
...  

AbstractThe brown planthopper Nilaparvata lugens is a serious phloem-feeding pest of rice in China. The current study focuses on a saccharopine dehydrogenase (SDH) that catalyzes the penultimate reaction in biosynthesis of the amino acid lysine (Lys), which plays a role in insect growth and carnitine production (as a substrate). The protein, provisionally designated as NlylsSDH [a SDH derived from yeast-like symbiont (YLS) in N. lugens], had a higher transcript level in abdomens, compared with heads, wings, legs and thoraces, which agrees with YLS distribution in N. lugens. Ingestion of Nlylssdh targeted double-stranded RNA (dsNlylssdh) for 5, 10 and 15 days decreased the mRNA abundance in the hoppers by 47, 70 and 31%, respectively, comparing with those ingesting normal or dsegfp diets. Nlylssdh knockdown slightly decreased the body weights, significantly delayed the development of females, and killed approximately 30% of the nymphs. Moreover, some surviving adults showed two apparent phenotypic defects: wing deformation and nymphal cuticles remained on tips of the legs and abdomens. The brachypterours/macropterours and sex ratios (female/male) of the adults on the dsRNA diet were lowered compared with the adults on diets without dsRNA. These results suggest that Nlylssdh encodes a functional SDH protein. The adverse effect of Nlylssdh knockdown on N. lugens implies the importance of Lys in hopper development. This study provides a proof of concept example that Nlylssdh could serve as a possible dsRNA-based pesticide for planthopper control.


Sign in / Sign up

Export Citation Format

Share Document