| Nombre científico |
Tipo de plaga |
| Macrophoma lupini (Cooke & Harkn.) Berl. & Voglino |
Hongo |
| Macrosiphum lili Monell |
Insectos |
| Maize chlorotic mottle virus |
Virus |
| Maize rough dwarf virus |
Virus |
| Maize streak virus |
Virus |
| Maize white line mosaic virus |
Virus |
| Mallodon downesi Hope |
Insectos |
| Malva vein clearing virus |
Virus |
| Mamestra brassicae (Linnaeus) |
Insectos |
| Marasmiellus cocophilus Pegler |
Hongo |
| Mauginiella scaettae Cavara |
Hongo |
| Mayetiola destructor (Say) |
Insectos |
| Megastigmus spermotrophus Wachtl |
Insectos |
| Melampsora farlowii (Arthur) Davis |
Hongo |
| Melampsora lini (Ehrenb.) Lév |
Hongo |
| Melanomma glumarum I. Miyake |
Hongo |
| Meliola bidentata Cooke |
Hongo |
| Meliola koae F. Stevens |
Hongo |
| Meloidogyne chitwoodi Golden, O'Bannon, Santo and Finley |
Nematodo |
| Meloidogyne mali Itoh, Ohshima & Ichinoe |
Nematodo |
| Melon necrotic spot virus |
Virus |
| Meria laricis Vuill |
Hongo |
| Merodon equestris (Fabricius) |
Insectos |
| Mikania cordata (Burm.f.) B.L.Rob. |
Maleza |
| Monilinia laxa (Aderh. & Ruhland) Honey |
Hongo |
| Monilochaetes infuscans Ellis & Halst. |
Hongo |
| Monochoria hastata (L.) Solms |
Maleza |
| Mulberry mosaic virus |
Virus |
| Mungbean yellow mosaic virus |
Virus |
| Mussidia nigrivenella Ragonot |
Insectos |
| Myagrum perfoliatum L. |
Maleza |
| Mycoenterolobium platysporum Goos |
Hongo |
| Mycosphaerella acaciae (Cooke & Harkn.) Tomilin |
Hongo |
| Mycosphaerella aleuritis S.H. Ou |
Hongo |
| Mycosphaerella anthurii Miles |
Hongo |
| Mycosphaerella bolleana B.B. Higgins |
Hongo |
| Mycosphaerella gibsonii H.C. Evans |
Hongo |
| Mycosphaerella koae Petr |
Hongo |
| Mycosphaerella laricis-leptolepidis Kaz. Itô, K. Satô & M. Ota |
Hongo |
| Mycosphaerella pruni-persicae Deighton |
Hongo |
| Mycosphaerella sentina (Fr.) J. Schröt |
Hongo |
| Myzus cerasi (Fabricius) |
Insectos |