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Can monophagous specialists mediate host plant choices in generalist planthoppers (Hemiptera: Delphacidae)?
Author(s) -
Dittrich Alex D.K.,
Helden Alvin J.
Publication year - 2020
Publication title -
ecological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 81
eISSN - 1365-2311
pISSN - 0307-6946
DOI - 10.1111/een.12929
Subject(s) - generalist and specialist species , delphacidae , biology , host (biology) , planthopper , hemiptera , competition (biology) , herbivore , preference , ecology , botany , homoptera , habitat , pest analysis , economics , microeconomics
A preference experiment was set up with two planthopper species (Hemiptera: Delphacidae) to test the influence of competition on host plant choice. The delphacid Javesella pellucida was chosen as a generalist and the rarer Ribautodelphax imitans as a monophagous specialist, which feeds on the grass, tall fescue Schedonorus arundinaceus . In the absence of the specialist, the generalist showed a marked preference for tall fescue. In some experiments, however, the introduction of the specialist resulted in a shift of preference to an alternative plant if the specialist was established prior to the introduction of the generalist. This experiment supports the hypothesis that specialist herbivores can potentially alter the host plant choices of generalists, which may lead to differing host plant use patterns in insect communities.