Table 1.
Diseases and arthropod pests monitored by the Quebec Apple Network from 1977 to 2019.
| Common Name | Latin Name | Family (Part Attacked 1) |
|---|---|---|
| Primary pests | ||
| Plum curculio | Conotrachelus nenuphar (Hbst.) | Curculionidae (F) |
| Codling moth 2 | Cydia pomonella (L.) | Tortricidae (F) |
| Fire blight | Erwinia amylovora (Burrill) Winslow et al. | Enterobacteriaceae (F,L,W) |
| Apple maggot | Rhagoletis pomonella (Walsh) | Tephritidae (F) |
| Tarnished plant bug | Lygus lineolaris (P. de B.) | Miridae (F) |
| Apple scab | Venturia inaequalis (Cke.) Wint. | Venturiaceae (F,L,W) |
| European red mite | Panonychus ulmi (Koch) | Tetranychidae (L) |
| Oblique-banded leafroller | Choristoneura rosaceana (Harr.) | Tortricidae (F,L) |
| Secondary pests | ||
| European apple sawfly | Hoplocampa testudinea (Klug) | Tenthredinidae (F) |
| Eye-spotted budmoth | Spilonota ocellana (D. S.) | Tortricidae (F,L) |
| Apple plant bug | Lygocoris communis (Knight) | Miridae (F) |
| Rosy apple aphid | Dysaphis plantaginea (Pass.) | Aphididae (F) |
| Mullein bug | Campylomma verbasci (Meyer) | Miridae (F) |
| Speckled green fruitworm | Orthosia hibisci (Gn.) | Noctuidae (F) |
| Spotted tentiform leafminer | Phyllonorycter blancardella (F.) | Gracillairiidae (L) |
| Green apple aphid | Aphis pomi DeG. | Aphididae (L) |
| White apple leafhopper | Typhlocyba pomaria (McAtee) | Cicadellidae (L) |
| Oystershale scale | Lepidosaphes ulmi (L.) | Diaspididae (W) |
| Fruit-tree leafroller | Archips argyrospila (Wlk.) | Tortricidae (F) |
| Apple rust mite | Aculus schlechtendali (Nal.) | Tortricidae (F,L) |
| Red-banded leafroller | Argyrotaenia velutinana (Wlk.) | Tortricidae (F,L) |
| Buffalo treehopper | Stictocephala bisonia K. Y. | Membracidae (W) |
| Dogwood borer | Synanthedon scitula (Harr.) | Sesiidae (W) |
| Woolly apple aphid | Eriosoma lanigerum (Hausm.) | Aphididae (L,W) |
| Minor pests | ||
| Apple grain aphid | Rhopalosiphum fitchii (Sand.) | Aphididae (L) |
| Lesser apple worm 2 | Grapholita prunivora (Walsh) | Tortricidae (F) |
| Oriental fruit moth 2 | Grapholita molesta (Busck) | Tortricidae (F,L) |
| Apple red bug | Lygidea mendax Reut. | Miridae (Fr) |
| Hawthorn dark bug | Heterocordylus malinus Reut. | Miridae (F) |
| Round-headed apple tree borer | Saperda candida (F.) | Cerambicidae (W) |
| Eastern tent caterpillar | Malacosoma americanum (F.) | Lasiocampidae (L) |
| Forest tent caterpillar | Malacosoma disstria Hbn. | Lasiocampidae (L) |
| Potato leafhopper | Empoasca fabae (Harris) | Cicadellidae (L) |
| Fall webworm | Hyphantria cunea (Drury) | Arctiidae (L) |
| Pale apple leafroller | Pseudexentera mali Free. | Tortricidae (F,L) |
| Brown marmorated stink bug | Halyomorpha halys (Stal) | Pentatomidae (F) |
| Green stink bug | Acrosternum hilare (Say) | Pentatomidae (F) |
| Brown stink bug | Euschistus servus (Say) | Pentatomidae (F) |
| Apple leafcurling midge | Dasineura mali (Kieffer) | Cecidomyidae (L) |
| European fruit scale | Quadraspidiotus ostreaeformis (Curt.) | Diaspididae (F,W) |
| Rose chafer | Macrodactylus subspinosus (F.) | Scarabeidae (F,L) |
| Japanese beetle | Popillia japonica (Newman) | Scarabeidae (F,L) |
1 F=fruit; L= leaves; W= branches, trunk. 2 These tortricid species are commonly referred to as “internal lepidoptera” because of their feeding habits (see Table 2).