Cold temperatures reduce respiration rates in lettuce and slow the ethylene reaction.Well-ventilated coolers can help minimize ethylene exposure.

It might not look appetizing, but russet spotting on lettuce is safe to eat. Russet spotting on lettuce is safe to eat, but it does make the food unattractive.Russet spotting occurs because of a chemical reaction that involves ethylene gas, and it can be minimized with certain handling and storage practices. Use of this web site constitutes acceptance of the LIVESTRONG.COM The Impatiens necrotic spot virus (abbreviated INSV) was first found and documented on California lettuce in 2006. Turn the leaf over, and look at the image below:This is Rib Discoloration, affecting the midrib.

This post is filed under Defect Identification.. You can follow any responses to this entry through the RSS 2.0 feed.. You can leave a response, or trackback from your own site.. 7 Comments on “Lettuce- Rusty Brown Discoloration” Gaylene Rea Says: June 30th, 2011 at 7:30 pm I was surprised to read that you had never seen this brown on lettuce.

But if you're noticing the red color spreading throughout, it's probably just older lettuce.No matter what, pinkish or reddish lettuce (that's not naturally that color) means that the lettuce isn't in the best, freshest condition.There's no harm in actually eating lettuce that's oxidizing and turning pink. Claudia is an expert at intuitive eating, nutrition science, and removing diets from your life.

Lettuce with white spots might mean a few different things, and this article will help. LIVESTRONG.com may earn compensation through affiliate links in this story. In fact all types of lettuce when they get old will have those signs of imperfections on the leaves, ribs even at the bottom of the stem. The commonly-held belief is that this reddish-brown pigment and russet spotting on Romaine lettuce offers some defense against plant attackers such as fungi and insects, the historical … LIVESTRONG.com may earn compensation through affiliate links in this story. She runs the website Sumei FitzGerald has been writing professionally since 2008 on health, nutrition, medicine and science topics. Store your lettuce away from your fruits to reduce ethylene exposure.Ethylene gas causes greens to yellow faster and causes brown spots on lettuce.

2020 Pink lettuce can be eaten safely, provided the greens are still fresh.

Thanks for the question!Let’s look at the USDA Inspection Instructions for further guidance:

Bruised or otherwise damaged lettuce is more susceptible to the chemical reactions that occur with ethylene gas, according to Russet spotting occurs as plant compounds known as polyphenols react with enzymes present in the lettuce, according to the University of California. Lettuce seed has a germination rate of 99 percent at 77°F; the germination ... Sunken, water-soaked spots appear on lower leaves which turn brown and slimy. In fact, it's a good idea to wrap lettuce in a paper towel before putting it in a container.Be sure to store it away from fruits and vegetables that produce high levels of ethylene gas. Pink lettuce can be eaten safely, provided the greens are still fresh. The injury will sometimes break down into decay in transit.There are several types of discoloration which may affect romaine. This may occur during harvest, handling and transport. You can add the lettuce to your No one is truly sure about why russet spotting occurs.The commonly-held belief is that this reddish-brown pigment and russet spotting on Romaine lettuce offers some defense against plant attackers such as fungi and insects, the historical causes of plant damage. This alone would be enough to be considered a defect, damage by rib discoloration.Be careful when inspecting Romaine, Green Leaf, Red Leaf or You can follow any responses to this entry through the I was inspecting Romaine just yesterday, and came across yellow spots on the leaves (discoloration).

It's just an indication that you'll need to eat it quickly before it goes bad.To keep lettuce from turning shades of red, store it in the refrigerator away from fruits and vegetables that produce lots of ethylene gas, and you're golden. She holds a Bachelor of Arts in sociology from the University of Connecticut where she also studied life sciences.

If you reviewed the USDA Grade Standards for Romaine, you find a very generic definition stating,  Downy Mildew can be recognized by sharply defined angular spots, yellowish to brown in color on the upper side of the leaf while the lower surfaces often show a whitish mold growth. Disclosure: As Amazon Associates we earn from qualifying purchases.

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