With time, the spots enlarge and concentric rings appear on them. There are a number of pests that attack lettuce … In fact, people reported eating romaine lettuce at home, restaurants, fast-food chains and from prepared salads bought at grocery stores, further complicating the picture. *After hearing about the romaine outbreaks, according to CR’s survey. The "Use By" date on the bag was 2 days ago and it was opened about a week or two ago. It is best to remove the outside leaves and discard them, then wash the remaining cabbage before use. Ways to Control a Lettuce Pest. A few leaves would get very few chewed holes, but I would pick them and wash with the rest. The disease was first reported in California in 1964.2 It has since been reported from the major lettuce growing regions worldwide3 probably due to contamination of seed.425 In addition to … I have a small raised bed (6' x 4') that has, among other things, leaf lettuce growing in it. I used a salad spinner after a good rinse. vitians1 was first described in the United States by Nellie Brown in 1918 from diseased lettuce in South Carolina and Virginia. Typically black spots on the outside of Napa cabbage won’t affect the inside leaves, but this depends on when the cabbage was harvested and how many days it has been in cold storage. In packaged (pre-cut) lettuce, oxidation causes moisture to collect at the bottom of the bag. It is not advisable to eat lettuce showing visible signs of spoilage, including wilting and excessive browning. All lettuce needs to be refrigerated, as it requires a cold, humid environment. You can prevent this disease by planting certified seed or disease-free transplants. The lettuce is still perfectly green and crunchy. Last year, I grew about 12 different kinds of leaf lettuce including red leaf and bib. As with most bacterial diseases, the pathogen, Xanthomonas campestris pv.vitians, is highly dependent on wet, cool conditions for infection and disease development. Read on to find out what causes tipburn of lettuce and how to manage tipburn in lettuce. Symptoms develop only if rain or sprinkler irrigation is present. The lettuce seems to be growing well, but when I harvest occasionally I will see small, black (ground pepper sized) dots on the leaves. What are the chances of my getting sick from eating this? Lettuce Storage and Shelf Life. What is lettuce tipburn? Bacterial leaf spot can occur on both leaf and head lettuce varieties. My dad made tacos tonight. Any variety of lettuce is fairly easy to grow; however, most varieties are susceptible to insect pests that attack the lettuce and either kill it off completely or do irreparable damage.Keep reading to learn more about these pests and when lettuce insecticide may be necessary for control. Throw out the whole head or package of lettuce. I'm a big hypochondriac and emetophobe so I don't want to get sick. Alternaria leaf spot is caused by fungus Alternaria brassicae. Lettuce is a fast-growing vegetable that can be harvested for use in salads as well as many other recipes. The leaves of the infected crop (especially kales) have black or brown circular spots. Black spots can occur during growth or due to mold. Spoiled lettuce also may assume a slimy appearance or texture. These little dots come off with some light rubbing and water but are kind of...sticky. Unless bugs are still attached, I … They aren't dirt. 56% of Americans rinse their lettuce before eating it*, but mere water does little to remove harmful bacteria. Lettuce can also turn brown as a result of oxidation. Should I pass? Bacterial leaf spot of lettuce caused by Xanthomonas campestris pv. Answer. Common Lettuce Pests. 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