wheat nitrogen fertilisation effects on the performance of the cereal aphid metopolophium dirhodum

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ID: 141330
2012
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Abstract
The effects of five rates of nitrogen fertiliser applications on the performance of the cereal aphid Metopolophium dirhodum on winter wheat, within the range of rates recommended for UK crops, were investigated over two seasons in field-grown crops and also on plants grown in the glasshouse. Longevity was unaffected by the level of fertilisation, but aphid intrinsic rate of increase and fecundity increased with each level applied. In the second field season, when a higher upper limit was used, many of these increases were significant. A previously unreported finding for this species was that there was a significant decrease in fecundity for the highest rate of fertilisation. Results for the glasshouse-reared aphids followed a similar pattern to those in the field, and overall they underline recent reports in the literature of the negative effects of high nutrient concentrations on the performance of herbivorous insects. The underlying reasons for these are discussed.
在英国作物推荐施氮量范围内，本研究通过两个生长季的大田试验和温室试验，探究了五个氮肥施用水平对冬小麦上麦无网长管蚜（*Metopolophium dirhodum*）生长发育表现的影响。蚜虫寿命未受施肥水平的影响，但其内禀增长率和繁殖力均随施肥量的增加而提高。在提高了施氮上限的第二个大田生长季中，许多增长达到了显著水平。该物种此前未见报道的一项发现是，在最高施肥水平下，蚜虫的繁殖力出现了显著下降。温室饲养蚜虫的结果与大田试验表现出相似规律；总体而言，这些结果进一步印证了近期文献中关于高养分浓度对植食性昆虫生存表现产生不利影响的报道。本文对产生这些现象的深层原因进行了讨论。
Reference Key
gash2012agronomywheat Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Alan F. J. Gash
Journal drinking water engineering and science
Year 2012
DOI
10.3390/agronomy2010001
URL
http://www.mdpi.com/2073-4395/2/1/1
Keywords
plant quality fecundity

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