The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.

• AGROMIX Project‏‎ (6 members)
• Above-ground nematode‏‎ (1 member)
• Acariens prédateurs‏‎ (2 members)
• Accident climatique et physiologique‏‎ (1 member)
• Adventices annuelles‏‎ (1 member)
• Agricology‏‎ (6 members)
• Agroforestry‏‎ (1 member)
• Agroforestry from Paradigmshiftfilm Sweden‏‎ (1 member)
• Alfalfa beetle‏‎ (1 member)
• Algae‏‎ (3 members)
• Aline - Installons-nous paysans‏‎ (1 member)
• Altise‏‎ (1 member)
• Amarantes‏‎ (1 member)
• Amaranth‏‎ (1 member)
• Annual Buttercup‏‎ (1 member)
• Annual and multi-annual crops grown exclusively in the tropics‏‎ (1 member)
• Annual and perennial crops‏‎ (2 members)
• Annual bluegrass‏‎ (1 member)
• Annual broadleaf weed‏‎ (2 members)
• Annual broadleaf weeds‏‎ (12 members)
• Annual dicotyledons‏‎ (10 members)
• Annual grass‏‎ (3 members)
• Annual grasses‏‎ (2 members)
• Annual knotweed‏‎ (2 members)
• Annual oats‏‎ (1 member)
• Annual wild buckwheat‏‎ (1 member)
• Anthémis‏‎ (2 members)
• Aphid‏‎ (7 members)
• Aphid parasitoids‏‎ (1 member)
• Aphid vectors of moderate yellows‏‎ (1 member)
• Aphids vectors of moderate yellows‏‎ (1 member)
• Aphids vectors of severe yellows‏‎ (1 member)
• Arable crops‏‎ (4 members)
• Arachnides‏‎ (2 members)
• Arachnids‏‎ (1 member)
• Arboriculture‏‎ (4 members)
• Arboriculture and berries‏‎ (9 members)
• Arboriculture and small fruit‏‎ (1 member)
• Arboriculture and small fruits‏‎ (2 members)
• Arboriculture et petits fruits‏‎ (4 members)
• Arthropod (pest)‏‎ (1 member)
• Arthropode (bioagresseur)‏‎ (1 member)
• Arthropodes prédateurs et granivores‏‎ (3 members)
• Articles Ecophyto‏‎ (1 member)
• Articles Terres-Inovia‏‎ (1 member)
• Articles issus de GECO‏‎ (31 members)
• Ashy apple aphid‏‎ (1 member)
• Avoines annuelles‏‎ (1 member)
• BIOFRUITNET‏‎ (17 members)
• Bacteria‏‎ (1 member)