Macadamia Nut (Macadamia integrifolia)
Macrophomina Disease (Macrophimina spp.)
Macrosporium Diseases (Macrosporium spp.)
Madder, Field (Sherardia Arvensis L)
Madrone/Pacific Madrone (Arbutus menziesii)
Madwort (Alyssum spp.)
Maggot (Diptera)
Maggot, Apple (Rhagoletis pomonella)
Maggot, Blueberry (Rhagoletis mendax)
Maggot, Cabbage (Delia radicum (Hylemya brassicae))
Maggot, Cone (various)
Maggot, Onion (Delia antiqua (Hylemya antiqua))
Maggot, Pepper (Zonosemata electa)
Maggot, Root (Anthomyiidae)
Maggot, Seed (Anthomyiidae)
Maggot, Seedcorn (Delia platura (Hylemya platura))
Maggot, Sugarbeet Root (Tetanops myopaeformis)
Maggot, Sunflower (Strauzia longipennis)
Magnolia, Sweet Bay/Small/Laurel (Magnolia virginiana)