Watt A D
Edinburgh Research Station, N.E.R.C. Institute of Terrestrial Ecology, Bush Estate, EH26 OQB, Penicuik, Midlothian, Scotland.
Oecologia. 1989 Feb;78(2):251-258. doi: 10.1007/BF00377163.
This paper reports part of a study to determine why damaging outbreaks of the pine beauty moth, Panolis flammea (D & S) (Lepidoptera: Noctuidae), in Scotland are frequent on lodgepole pine but do not occur on Scots pine, and why outbreaks on lodgepole pine are mainly confined to trees growing in deep unflushed peat. The elongation of shoots and the growth of needles of Scots pine occurred later in the season than did those of lodgepole pine. The foliage of Scots pine generally had a higher level of nitrogen, and consistently had a higher level of phosporus, but had a consistently lower level of tannins than that of lodgepole pine during the period when the larvae were feeding each year. The nitrogen content of the foliage of lodgepole pine growing in an iron pan soil was generally higher than that of lodgepole pine growing in deep peat during the same period but there were no general differences in the phosphorus or tannin contents of lodgepole pine in the 2 soil types. These findings suggest that Scots pine is a more suitable host plant than lodgepole pine and that the foliage of lodgepole pine growing in deep peat is not more suitable than lodgepole pine growing in an iron pan soil. On the basis of the chemical analyses used in this study, it is concluded that the abundance of pine beauty moth in Scotland is not strongly influenced by the nutritional suitability of its host plants.
本文报道了一项研究的部分内容，该研究旨在确定为何在苏格兰，火炬松上频繁爆发具破坏性的美丽松夜蛾（Panolis flammea (D & S)，鳞翅目：夜蛾科）疫情，而苏格兰松上却未出现此类疫情，以及为何火炬松上的疫情主要局限于生长在深层未冲刷泥炭地的树木。苏格兰松新梢的伸长和针叶的生长比火炬松在季节中发生得更晚。在每年幼虫取食期间，苏格兰松的树叶通常含氮量更高，且磷含量始终较高，但单宁含量始终低于火炬松。同期，生长在铁锅土中的火炬松树叶的氮含量通常高于生长在深层泥炭地中的火炬松，但两种土壤类型的火炬松在磷或单宁含量上并无总体差异。这些发现表明，苏格兰松是比火炬松更适宜的寄主植物，且生长在深层泥炭地中的火炬松树叶并不比生长在铁锅土中的火炬松树叶更适宜。基于本研究中所采用的化学分析，得出结论：苏格兰美丽松夜蛾的数量并不受其寄主植物营养适宜性的强烈影响。
