Appendix. Basic information on studies used in meta-analysis. Plant species and class (CL; A, Angiospermae; G, Gymnospermae); herbivore species, family, sub-guild (SG; P, phloem feeder; X, xylem feeder; M, mesophyll feeder; E, epidermal feeder), and specialization (SP; S, specialist; G, generalist); type of the experiment (EX; G, greenhouse; F, field); measured plant parts and types of response variables (A, area; B, biomass; L, linear size; N, number of organs; P, photosynthetic rate; C, chlorophyll content) and references for the studies used in the meta-analysis.

Plant species / CL / Insect species / Insect family / SG / SP / EX / Plant parts and variables / References
Acer pseudoplatanus / A / Drepanosiphum platanoides / Aphididae / P / S / F / root (B), shoot (B), leaf (A, B) / Whittaker and Warrington (1985)
Acer pseudoplatanus / A / Drepanosiphum platanoides / Aphididae / P / S / G / leaf (A) / Wellings and Dixon (1987)
Acer pseudoplatanus / A / Drepanosiphum platanoides / Aphididae / P / S / G / entire plant (B), leaf (A) / Dixon (1971a)
Acer saccharum / A / Taeniothrips inconsequens / Thripidae / E / G / G / leaf (A) / Kolb et al. (1991)
Carya illinoensis / A / Monelliopsis nigropunctata / Aphididae / P / G / G / stem (L, B), root (B), leaf (C) / Tedders et al. (1982)
Carya illinoensis / A / Monellia caryella / Aphididae / P / S / G / stem (L, B), root (B), leaf (C) / Tedders et al. (1982)
Carya illinoensis / A / Melanocallis caryaefoliae / Aphididae / P / S / G / stem (L, B), root (B), leaf (C) / Tedders et al. (1982)
Carya illinoensis / A / Monelliopsis pecanis / Aphididae / P / S / F / fruit (B), leaf(C) / Tedders and Wood (1985)
Carya illinoensis / A / Monellia caryella / Aphididae / P / S / F / fruit (B), leaf (C) / Tedders and Wood (1985)
Colliguayana odorifera / A / Planococcus citri / Pseudococci-dae / P / G / F / leaf (A, B), stem (B, L), root (B) / Mills (1984)
Eucalyptus blakelyi / A / Cardiaspina albitextura / Psyllidae / P / S / F / leaf (B) / Cunningham et al. (2009)
Eucalyptus blakelyi / A / Eriococcus coriaceus / Eriococcidae / P / S / G / leaf (A, B), stem (B), root (B) / Vranjic and Ash (1997)
Eucalyptus blakelyi / A / Eriococcus coriaceus / Eriococcidae / P / S / G / leaf (A, B), stem (B, L), root (B) / Vranjic and Gullan (1990)
Euonymus fortunei / A / Unaspis euonymi / Diaspididae / P / G / F / leaf (A, B), stem (B, L), root (B) / Cockfield and Potter (1987)
Euonymus fortunei / A / Unaspis euonymi / Diaspididae / P / G / G / stem (L), leaf (B), root (B) / Cockfield and Potter (1986)
Euphorbia pyrifolia / A / Icerya seychellarum / Margarodidae / P / G / F / leaf (N) / Newbery (1980a)
Gossypium hirsutum / A / Thrips tabaci / Thripidae / E / G / F / leaf (A, P), fruit (N, B) / Lei and Wilson (2004)
Gossypium hirsutum / A / Frankliniella sp. / Thripidae / E / G / F / leaf (A), fruit (B) / Rummel and Quisenberry (1979)
Gossypium hirsutum / A / Aphis gossypii / Aphididae / P / G / G / leaf (P) / Shannag et al. (1998)
Gossypium hirsutum / A / Aphis gossypii / Aphididae / P / G / G / aboveground (B), stem (B, L, N), leaf (B), fruit (B,N) / Rosenheim et al. (1997)
Guaiacum sanctum / A / Toumeyella sp. / Coccidae / P / G / G / leaf (A, B, C, P) / Schaffer and Mason (1990)
Lagerstroemia indica / A / Homalodisca coagulata / Cicadellidae / X / G / F / stem (L) / Andersen et al. (2003)
Macfadyena unguis-cati / A / Carvalhotingis visenda / Tingidae / M / G / G / stem (L, B), leaf (N, B, P), root (B) / Conrad and Dhileepan (2007)
Macfadyena unguis-cati / A / Carvalhotingis visenda / Tingidae / M / G / G / leaf (C) / Dhileepan et al. (2007)
Malus domestica / A / Aphis pomi / Aphididae / P / G / G / aboveground (B), root (B), stem (N, L), leaf (B, N) / Kaakeh et al. (1993a)
Malus domestica / A / Aphis spiraecola / Aphididae / P / G / G / aboveground (B), root (B), stem (N, L), leaf (B, N) / Kaakeh et al. (1993a)
Malus domestica / A / Aphis spiraecola / Aphididae / P / G / G / leaf (C, P) / Kaakeh et al. (1993b)
Malus domestica / A / Aphis pomi / Aphididae / P / G / G / leaf (P) / Hugentobler (1990)
Malus domestica / A / Magicicada sp. / Cicadidae / X / G / F / stem (L) / Karban (1982)
Malus domestica / A / Typhlocyba pomaria / Cicadellidae / M / G / G / leaf (P) / Marshall et al. (1942)
Malus domestica / A / Erythroneura spp. / Cicadellidae / M / G / G / leaf (P) / Marshall et al. (1942)
Malus domestica / A / Empoasca fabae / Cicadellidae / M / G / G / leaf (P) / Marshall et al. (1942)
Melaleuca quinquenervia / A / Boreioglycaspis melaleucae / Psyllidae / P / S / G / leaf (C) / Morath et al. (2006)
Melaleuca quinquenervia / A / Boreioglycaspis melaleucae / Psyllidae / P / S / F / stem (L, B) / Franks et al. (2006)
Melaleuca quinquenervia / A / Boreioglycaspis melaleucae / Psyllidae / P / S / F / leaf (N, B), stem (L) / Center et al. (2007)
Myrica faya / A / Sophonia rufofascia / Cicadellidae / P / G / F / stem (B, L), leaf (A, B, N) / Jones et al. (2000)
Picea alba / G / Cinara pilicornis / Aphididae / P / S / F / stem (L) / Holopainen et al. (1993)
Picea sitchensis / G / Elatobium abietinum / Aphididae / P / S / G / root (A, N) / Day and Cameron (1997)
Picea sitchensis / G / Elatobium abietinum / Aphididae / P / S / F / stem (L) / Straw et al. (1998)
Picea sitchensis / G / Pachypappa sp. / Pemphigidae / P / S / F / stem (L) / Straw et al. (1998)
Pinus concorta / G / Leptoglossus occidentalis / Coreidae / X / G / F / seed (N) / Strong et al. (2001)
Pinus edulis / G / Matsucoccus acalyptus / Margarodidae / M / S / F / stem (L) / Schuster et al. (2005)
Pinus sylvestris / G / Cinara pinea / Aphididae / P / S / F / needle (B), stem (B), root (B) / Neuvonen et al. (1992)
Pinus sylvestris / G / Schizolachnus pineti / Aphididae / P / S / F / needle (B), stem (B), root (B) / Neuvonen et al. (1992)
Pinus sylvestris / G / Cinara pilosa / Aphididae / P / S / F / needle (B), stem (B), root (B) / Neuvonen et al. (1992)
Pinus taeda / G / Cinara atlantica / Aphididae / P / S / G / stem (L) / Zaleski et al. (2005)
Pinus taeda / G / Cinara atlantica / Aphididae / P / S / G / stem (L) / Fox and Griffith (1977)
Prunus persica / A / Myzus persicae / Aphididae / P / G / F / fruit (B) / Sacchetti and Niccoli (1995)
Prunus persica / A / Myzus persicae / Aphididae / P / G / F / leaf (N), fruit (N) / Grechi et al. (2008)
Pseudotsuga menziesii / G / Cinara pseudotsugae / Aphididae / P / S / G / aboveground (B), root (B) / Smith and Schowalter (2001)
Psidium guajava / A / Sophonia rufofascia / Cicadellidae / P / G / F / fruit (B), leaf (C) / Jones et al. (1998)
Quercus ilicifolia / A / Magicicada sp. / Cicadidae / X / G / F / seed (N, B), root (B) / Karban (1985)
Rhus glabra / A / Melaphis rhois / Aphididae / P / S / F / leaf (P) / Larson (1998)
Salix myrsinifolia / A / Pterocomma salicis / Aphididae / P / S / F / stem (L) / Sipura (2002)
Salix phylicifolia / A / Pterocomma salicis / Aphididae / P / S / F / stem (L) / Sipura (2002)
Salix viminalis / A / Tuberolachnus salignus / Aphididae / P / S / G / stem (B), root (B), leaf (P) / Collins et al. (2001)
Salix viminalis / A / Pterocomma salicis / Aphididae / P / S / G / stem (B), root (B) / Collins et al. (2001)
Scaevola taccada / A / Icerya seychellarum / Margarodidae / P / G / F / leaf (A), root (B) / Newbery (1980b)
Tilia x vulgaris / A / Eucallipterus tiliae / Aphididae / P / S / G / leaf (A, N), entire plant (B) / Dixon (1971b)
Vitis labruscana / A / Lygocoris inconspicuous / Miridae / M / S / F / fruit (B, N) / Rhainds et al. (2002)
Vitis vinifera / A / Empoasca vitis / Cicadellidae / P / G / F / fruit (N, B), leaf (N, B, P) / Candolfi et al. (1993)
Vitis vinifera / A / Viteus vitifoliae / Phylloxeridae / P / S / G / aboveground (B), root (B), leaf (C) / Omer et al. (1995)
Vitis vinifera / A / Viteus vitifoliae / Phylloxeridae / P / S / G / leaf (C) / Blanchfield et al. (2006)

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