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| 1 | Effects of nitrogen on the tolerance of brown planthopper,Nilaparvata Lugens, to adverse environmental factors显示文摘The effect of nitrogen content in rice plants on the tolerance of brown planthopper (BPH), Nilaparvata lugens Stal to high temperature, starvation and insecticide, was studied in the laboratory at International Rice Research Institute (IRRI), Philippines. Survival of nymphs and adults, fecundity and egg hatchability were significantly increased by the increase of nitrogen content in host plants at 38℃. Moreover, the survival of nymphs,fecundity and egg hatchability were significantly higher in BPH populations on rice plants with a high nitrogen regimen than those on rice plants with a low nitrogen regimen.Meanwhile, the tolerance of female adults to starvation and nymphs to growth regulator buprofezin on rice plants with a high nitrogen regimen were slightly increased. This indicates that the tolerances of BPH to adverse environmental stresses were positively increased by the application of nitrogenous fertilizer. The outbreak potential of BPH induced by the excessive application of fertilizer in rice fields was also discussed. | ZHONG-XIANLU KONG-LUENHEONG XIAO-PINGYU CUIHU | 2005 | Insect Science2005，12，2： | 16 |
| 2 | Enhancement of Supercontinuum Spectrum Generation in aDispersion-Decreasing Fibre with a Concave Dispersion Profile显示文摘A new approach is proposed to enhance supercontinuum (SC) spectrum generation in A dispersion-decreasingoptical fibre with a new dispersion profile. The chromatic dispersion D(λ, z) is a concave function of wavelengthsand has no zero-dispersion wavelengths over the whole or part of the fibre as D(λ, z) is positive. A flatter andmuch broader spectrum can be produced based on the scheme. The general criteria parameters are obtained forcharacterizing SC shapes in the optical fibres. | XUWen-Cheng JINWei XUYong-Zhao CUIHu LIUSong-Hao | 2004 | Chinese Physics Letters2004，21，6： | 5 |
| 3 | PHOTOPERIODIC CONTROL OF ADULT DIAPAUSE IN CHRYSOPERLA SINICA (TJEDER) (NEUROPTERA: CHRYSOPIDAE) -I. CRITICAL PHOTOPERIOD AND SENSITIVE STAGES OF ADULT DIAPAUSE INDUCTION显示文摘Photoperiodic sensitivity for diapause induction of the green lacewing, Chrysoperla sinica (Tjeder) was examined at 22℃. The adult diapause of C. sinica was induced by short-day photoperiods, and the critical photoperiod for its induction was between 12.5L-11.5D and 13L-11D.Adults developed without diapause under long-day conditions, and entered diapause under short-day conditions. The adult stage was the uppermost sensitive stage for adult diapause induction, adults could go into diapause only when the emerging adults were under diapause-inducing short-day photoperiods. The short-day photoperiodic experience by transferring between 15L: 9D and 9L: 15D at preimaginal stages did not result in adult diapause under 15L: 9D photo regime, although some treatments extended the pre-oviposition period in adult stage. The results showed that the 3rd instar larvae and pre-pupae were more sensitive to the photoperiodic change from 15L: 9D to 9L: 15D photo regime than the other preimaginal stages. | Yong-yuXu Ji-yuanMu CuiHu Hong-gangWang | 2004 | Entomologia Sinica2004，11，3： | 4 |
| 4 | Supercontinuum Generation Enhanced by Cross-phase Modulation in Dispersion-flattened and Decreasing Fiber显示文摘Supercontinuum spectrum generation in a dispersion-flattened and decreasing fiber with two orthogonally polarized pulses was simulated and calculated. The research results indicated that the supercontinuum spectrum generated by two orthogonally polarized pulses is wider and flatter than that generated by single polarized pulse due to cross-phase modulation. The cross-phase modulation effect can enhance the supercontinuum spectrum generation. When the pump power of the input pulse is lower, the enhancement of supercontinuum spectrum generation by cross-phase modulation effect is more significant. | XUWen-cheng XUYong-zhao YUBing-tao CUIHu CHENYong-zhu LIUSong-hao | 2005 | Semiconductor Photonics and Technology2005，11，2： | 1 |
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