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The Effect of Changes in Organic Nitrogen Concentration of Rumex obtusifolius L. on the Population Dynamics of Aphis rumicis L. (Homoptera: Aphididae)
Author(s) -
KWON Ohseok
Publication year - 2002
Publication title -
entomological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 20
eISSN - 1748-5967
pISSN - 1738-2297
DOI - 10.1111/j.1748-5967.2002.tb00030.x
Subject(s) - biology , aphididae , homoptera , aphis , phloem , population , botany , rhopalosiphum padi , agronomy , pest analysis , aphid , demography , sociology
The study of plant‐herbivore dynamics was carried out using Aphis rumicis L. The insect is oligophagous to the genus Rumex. It utilizes its food plant by means of phloem sucking. Here, in this study, organic nitrogen as a form of a pellet fertilizer was used as a limiting factor. The major aim of the study is to find out the tripartite relationship among soil nitrogen concentration, the plant, and the insect. Observations were made from both the natural habitat site and the manipulated field site. The result shows that Aphis rumicis responded positively to increased N concentration of leaves (p< 0.005). The application of organic nitrogen did not alter the pattern of the population dynamics of Aphis rumicis over the study period. However, it may determine the time for the optimal exploitation of resources by the insect. It is also suggested that the growth efficiency of the insect relates to the C: N ratio in the phloem.