Onion and Garlic Pest Management Guidelines
UC agricultural management guidelines for control of onion and garlic pests. Relative Toxicities of Insecticides and Miticides Used in Onions and Garlic to Natural Enemies and Honey Bees (6/08) Onion and Garlic Weed Photo Gallery, with Common and ... [... more]
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Pathogen: Phoma terrestris
The most striking symptom of pink root is, as the name indicates, pink roots. Infected roots first turn light pink, then darken through red and purple, shrivel, turn black, and die. The pinkish red discoloration may extend up into the scales of ... [... more]
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Blue Mold Rot
UC Management Guidelines for Blue Mold Rot on Onion and Garlic. Blue mold generally appears during harvesting and storage. Initial symptoms include watersoaked areas on the outer surface of scales. Later, a green to blue green, powdery mold may ... [... more]
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Pathogen: Pseudomonas (Burkholderia) cepacia
Individual leaves affected by sour skin wilt and die back. Internally, leaves develop a soft, watery rot. The fleshy scales associated with infected leaves rot to form a tan-colored slimy ring in the bulb. Adjacent rings may remain healthy. The ... [... more]
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Resistant cultivars.
Stem and bulb nematode and root knot nematodes cause substantial damage and are of major concern in California. The stem and bulb nematode penetrates the germinating clove and destroys tissue as it moves through seeking food. Nematodes sucking ... [... more]
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Nonchemical control.
Information about Integrated Weed Management in Onion and Garlic. Onions and garlic are slow growing, shallow-rooted crops that can suffer severe yield loss from weed competition. Their narrow, upright leaves do not compete well with weeds. In ... [... more]
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General Properties of Fungicides
Information about General Properties of Fungicides in Onion and Garlic. Information from: Fungicide Resistance Action Committee (http://www.frac.info.) QoI = quinone outside inhibitor (strobilurin). DMI = demethylation (sterol) ... [... more]
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Relative Toxicities to Insecticides and Miticides Used ...
Information about Relative Toxicities to Insecticides and Miticides Used in Onion and Garlic to Natural Enemies and Honey Bees. cyromazine (Trigard) methyl parathion (Penncap-M) pyrethrin/rotenone (Pyrellin E.C.) narrow (thrips, leafminers) If ... [... more]
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Susceptibility of Weeds of Onion and Garlic to Herbicide ...
ETH = ethofumesate (Norton) FLU = fluazifop-P-butyl (Fusilade) dock, curly (seedling) DIM = dimethenamid (Outlook) PEN = pendimethalin (Prowl, Prowl H2O) dock, curly (plant) BRO = bromoxynil (Buctril) MET = metam sodium* (Vapam, etc.) OXY = ... [... more]
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Black Mold
UC Management Guidelines for Black Mold on Onion and Garlic. Black mold occurs on both onions and garlic. The fungus is first evident at the top or sides of the bulb where disease or injury has caused an opening in the skin. The fungus develops ... [... more]
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Botrytis Neck and Bulb Rot
UC Management Guidelines for Botrytis Neck and Bulb Rot on Onion and Garlic. In onions, Botrytis bulb rot generally appears during storage, although infection originates in the field. Initial symptoms usually begin at the neck, where affected ... [... more]
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Pathogen: Fusarium oxysporum f. sp. cepae
Plants affected by basal rot show progressive yellowing and dieback from the tips of leaves. Affected roots are dark brown to dark pink. A white fungal growth is sometimes evident at the base of infected bulbs. When an infected bulb is cut ... [... more]
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