Allium cepa is an evergreen Bulb growing to 0.6 m .
It is hardy to zone 5 and is not frost tender. It is in flower from June to July. The species is hermaphrodite and is pollinated by Bees, insects.
Suitable for: light and medium soils and prefers well-drained soil. Suitable pH: acid, neutral and basic soils and can grow in very alkaline soils.
It cannot grow in the shade. It prefers moist soil.
HabitatsCultivated Beds
HabitatsCultivated Beds
Resources
"Burned tip" or downy mildew in onions
FACTSHEETS FOR FARMERS www.plantwise.org Created in Honduras , November 2012 "Burned tip" or downy mildew in onions Recognize the problem Downy mildew is a fu
Cabi Plantwise Knowledge Bank30. Production and postharvest activities for fonio
AgriGuide
Agriguide.orghttp://www.agriguide.org/agriguide/files/etic_agriguide_en_20120830.pdf
E-TIC
E-TIC Sahel InfoHubs
Senegal and Mali
Initiative de
Avec le soutien de
ICVolunteers30. Production and postharvest activities for fonio
AgriGuide
E-TIC
E-TIC Sahel InfoHubs
Senegal and MaliInitiative de
Avec le soutien de
http://www.agriguide.org/agriguide/files/etic_agriguide_en_20120830.pdf30. Production and postharvest activities for fonio30. Production and postharvest activities for fonio
AgriGuide
Agriguide.orghttp://www.agriguide.org/agriguide/files/etic_agriguide_en_20120830.pdf
E-TIC
E-TIC Sahel InfoHubs
Senegal and Mali
Initiative de
Avec le soutien de
ICVolunteersAFRGM Field Guide Pdf
African Rice Gall Midge:
Africa Rice Centerhttp://www.africarice.org/publications/AFRGM_Field_Guide_Pdf.pdf
Biology, Ecology and Control
CGIAR
®
F.E. Nwilene, K.F. Nwanze and O. Okhidievbie
Africa Rice Center (WARDA)
Field Guide
Major pests
- Aceria tulipae
Acrolepiopsis assectella
Agrotis
Agrotis exclamationis
Agrotis ipsilon
Alternaria porri
Amaranthus retroflexus
Aspergillus niger
Bactericera tremblayi
Borreria latifolia
Botryotinia fuckeliana
Botryotinia porri
Botryotinia squamosa
Botrytis aclada
Burkholderia cepacia
Burkholderia gladioli pv. alliicola
Candidatus Phytoplasma asteris
Capsella bursa-pastoris
Chamomilla recutita
Chenopodium murale
Chromatomyia horticola
Ciborinia allii
Colletotrichum circinans
Colletotrichum dematium
Cornu aspersum
Cuscuta europaea
Cynodon dactylon
Delia antiqua
Delia florilega
Ditylenchus destructor
Ditylenchus dipsaci
Echinochloa crus-galli
Eleusine indica
Emilia sonchifolia
Epitrix cucumeris
Eragrostis cilianensis
Euphorbia hirta
Euxoa messoria
Frankliniella occidentalis
Fumaria officinalis
Fusarium oxysporum f.sp. cepae
Galinsoga parviflora
Galinsoga quadriradiata
Glomerella cingulata
Helicotylenchus dihystera
Hibiscus trionum
Iris yellow spot virus
Liriomyza huidobrensis
Listroderes costirostris
Lolium temulentum
Longidorus
Loxostege sticticalis
Macrophomina phaseolina
Mamestra brassicae
Melanoplus sanguinipes
Melilotus indica
Meloidogyne exigua
Neotoxoptera formosana
Onion yellow dwarf virus
Oxalis latifolia
Pantoea ananatis
Paratrichodorus minor
Paratrichodorus porosus
Parthenium hysterophorus
Pectobacterium carotovorum subsp. carotovorum
Peronospora destructor
Petrobia latens
Phytophthora cryptogea
Phytophthora porri
Pleospora tarda
Poa annua
Polygonum aviculare
Polygonum hydropiper
Polygonum lapathifolium
Pratylenchus penetrans
Pseudomonas marginalis pv. marginalis
Pseudomonas syringae pv. porri
Pseudomonas syringae pv. syringae
Pseudomonas viridiflava
Puccinia allii
Raphanus raphanistrum
Rhizobium radiobacter
Rhizobium rhizogenes
Rhizoglyphus echinopus
Richardia brasiliensis
Scirtothrips dorsalis
Sclerotinia sclerotiorum
Senecio vulgaris
Setaria verticillata
Setaria viridis
Shallot latent virus
Shallot virus X
Shallot yellow stripe virus
Sida acuta
Solanum nigrum
Sonchus oleraceus
Spodoptera littoralis
Spodoptera litura
Stegobium paniceum
Stemphylium vesicarium
Stromatinia cepivora
Thlaspi arvense
Thrips palmi
Thrips tabaci
Tomato black ring virus
Trichodorus
Urocystis cepulae
Urtica urens
Xanthomonas axonopodis pv. allii
Zonocerus elegans
Zonocerus variegatus
Acrolepiopsis assectella
Bactericera tremblayi
Botryotinia allii
Brachycerus albidentatus
Caliothrips indicus
Delia antiqua
Ditylenchus dipsaci
Iris yellow spot tospovirus
Neotoxoptera formosana
Stromatinia cepivora
Urocystis cepulae
Xanthomonas axonopodis pv. allii
Minor pests
- Abutilon theophrasti
Achatina fulica
Alopecurus myosuroides
Amaranthus blitum
Ambrosia artemisiifolia
Anagallis arvensis
Aphelenchoides besseyi
Aphelenchoides fragariae
Athelia rolfsii
Atherigona orientalis
Bacillus amyloliquefaciens
Belonolaimus longicaudatus
Burkholderia gladioli
Burkholderia pyrrocinia
Cenchrus echinatus
Chalara elegans
Cirsium arvense
Cirsium vulgare
Colletotrichum coccodes
Cuscuta japonica
Cyperus rotundus
Delia floralis
Delia platura
Diaporthe phaseolorum var. sojae
Dickeya chrysanthemi
Dyspessa ulula
Emex australis
Enterobacter cloacae
Erwinia rhapontici
Euphorbia heterophylla
Fallopia convolvulus
Frankliniella schultzei
Frankliniella tenuicornis
Fusarium brachygibbosum
Fusarium oxysporum
Fusarium proliferatum
Fusarium redolens
Gibberella acuminata
Globisporangium irregulare
Groundnut bud necrosis virus
Gryllotalpa africana
Hadula trifolii
Haematonectria haematococca
Helicotylenchus pseudorobustus
Ischaemum timorense
Leek yellow stripe virus
Leveillula taurica
Liriomyza
Liriomyza trifolii
Melanoplus bivittatus
Meloidogyne ethiopica
Meloidogyne graminicola
Meloidogyne hapla
Naupactus leucoloma
Nicandra physalodes
Olpidium brassicae
Orobanche ramosa
Papaver rhoeas
Pectobacterium atrosepticum
Penicillium aurantiogriseum
Penicillium digitatum
Peridroma saucia
Phalaris minor
Phomopsis longicolla
Phytomyza gymnostoma
Phytophthora nicotianae
Polygonum persicaria
Portulaca oleracea
Pratylenchus brachyurus
Pratylenchus thornei
Pratylenchus zeae
Puccinia asparagi
Pyrenochaeta terrestris
Rumex crispus
Scutellonema clathricaudatum
Serratia grimesii
Spergula arvensis
Spodoptera eridania
Spodoptera exigua
Spodoptera frugiperda
Stellaria media
Tetranychus cinnabarinus
Tetranychus urticae
Theba pisana
Thrips angusticeps
Thysanoplusia orichalcea
Tobacco rattle virus
Tobacco streak virus
Tomato spotted wilt virus
Tribulus terrestris
Trichoplusia ni
Xestia c-nigrum
Zygotylenchus guevarai