Lettuce
Relative Toxicities of Insecticides and Miticides Used in Lettuce to Natural Enemies and Honey Bees (2/04) ... [... more]
University of California IPM |
Lettuce Drop
Two species of Sclerotinia infect lettuce in California and cause a disease known as lettuce drop: in coastal growing areas Sclerotinia minor is the primary species of importance, while in other areas S. sclerotiorum ... [... more]
University of California IPM |
Lettuce Mosaic
A lettuce mosaic control program is a good example of an integrated way of controlling a plant disease. Plant lettuce seed that has been tested for the virus and that contains no infected seed/30,000 seed tested ... [... more]
University of California IPM |
Beet Armyworm
Start monitoring before seedlings emerge by checking for egg masses and young larvae in surrounding weeds. If populations are high on weeds, watch carefully for larvae on seedlings. Once seedlings emerge, check for ... [... more]
University of California IPM |
Nematodes
Chemical. Damage thresholds have not been developed for nematodes on lettuce. Treatment for root knot nematode is advised if any are detected in sandy, loamy sand, or sandy loam soils, or where high numbers are found ... [... more]
University of California IPM |
Leafminers
Adults are small black to gray flies with yellow markings. Females puncture leaves to feed on plant sap and lay eggs within the leaf tissues. After 2 to 4 days eggs hatch and larvae feed between the upper and lower ... [... more]
University of California IPM |
Armyworm
Armyworm larvae are variable in color but are usually dark green or gray, with three thick stripes running down each side. First instar larvae loop, but older larvae move the same way as other armyworms. ... [... more]
University of California IPM |
Relative Toxicities Of Insecticides And Miticides Used ...
5 Ratings are as follows: I = Do not apply to blooming plants; II = Apply only during late evening; III = Apply only during late evening, night, or early morning; and IV = Apply at any time with reasonable safety to ... [... more]
University of California IPM |
Beet Yellow Stunt
Beet yellow stunt causes pronounced yellowing of older leaves; later, infected plants collapse prematurely and die. Internally, the phloem tissue of the stem and crown is brown and necrotic. ... [... more]
University of California IPM |
Susceptibility Of Weeds To Herbicide Control
S. A. Fennimore, Vegetable Crops/Weed Science, UC Davis/Salinas ... [... more]
University of California IPM |
Downy Mildew
Damp, cool conditions and moisture on leaves are required for the fungus to infect lettuce and cause symptoms to develop. The short-lived spores are dispersed by winds during moist periods. Cultivated lettuce is the ... [... more]
University of California IPM |
Foxglove Aphid
Foxglove aphid is a pest of lettuce in California's Central Coast, although it may also occur on other crops. It is nearly indistinguishable in the field from another pest of lettuce, the lettuce aphid (Nasonovia ... [... more]
University of California IPM |
