All Rights Reserved. However, it is the contamination of harvestable plant material (e.g., lettuce heads, celery hearts) by the aphids themselves that makes them economically important. They suck the plant saps out of your plants’ leaves, and the plants die.Does this seem intimidating? You did not say what lettuce you grew with aphids. Lettuce aphid information informs us about their prolific reproduction, which is definitely no boon to the gardener. There is one type that loves to gobble up lettuce that is grown in Australia and New Zealand. You can reach him at [email protected]. Aphids (or plant lice) pose multiple threats to your lettuce. The distribution of wingless nymphs within plants will vary among aphid species. On lettuce, root aphids may be present, but are unlikely to slow growth. They pierce the stems and suck the nutrient-rich sap from the plant, leaving behind curled or yellowed leaves, deformed flowers, or damaged fruit. The adults have black markings on their leg joints and antennae. Apply Insecticide Sprays Early However, these same insecticides are generally not very effective against foxglove and lettuce aphids. also keep the row cover off to allow the predatory bugs to eat the aphids. The bugs should not be inside the head. For vegetable growers to successfully compete in the fresh market, they must be able to produce high-quality, insect-free crops. Aphid infestations tend to develop quickly, and the insects are highly mobile: they rapidly travel from one plant to another. This closeup shows winged adult males along with wingless nymphs.Photo by John Palumbo. On leafy vegetables, the aphid complex will consist primarily of green peach aphid, Myzus persicae, potato aphid, Macrosiphum euphorbiae and turnip aphid, Lipaphis erysimim. But you can also spot their presence by the damage they'll cause. Many of these offspring will become mature, wingless aphids that in turn will deposit more live nymphs. Secondly, aphid corpses are usually covered in parasites, and they can’t be rinsed off of the lettuce. Inspect Your Plants Regularly. One of the best ways to organically control … Because aphids have the potential to rapidly contaminate plants, preventing their establishment is critical for the production of quality crops. Infestations can develop quickly when weather conditions are favorable, and fields should be scouted frequently, at least two to three times per week. Aphid Identification is Important. Scout Fields Thoroughly When aphids or other sap sucking insects suck sap from a plant, the plant is weakened and there is a risk of the insect infecting the plant with disease. Aphids hate mint, garlic, onions, and chives. These young aphids aggregate closely, and their feeding activity crumple the … Cultural management and natural enemies can’t always prevent aphid colonization though, and insecticides may be required to prevent contamination. Naturally occurring predators of the lettuce aphid include syrphid fly larvae and green lacewing... Organically Acceptable Methods. It … When cultural practices and natural enemies alone are not able to prevent aphid infestations, insecticides can be a reliable option for controlling aphids. 2. Understanding the distribution of the aphids also can aid in their identification. When winged aphids initially begin dispersing into a growing area, … Generally 0.2-0.5% emulsions of the oil are effective against aphid populations with such application generally killing most aphids when they work (see here and here). Its shiny black eggs spend the winter on the bark of fruit trees. Lettuce is easy 'food' for aphids but rarely will you see aphids on lettuce unless there is nothing else available and/or they've been PUT there by ants! Look for tear drop shaped crawling insects. This method also has been used successfully in other leafy vegetables. This field is for validation purposes and should be left unchanged. Lettuce Aphid Information. Aphids all have similar life cycles… This approach has resulted in reduced insecticide usage and improved protection of lettuce heads at harvest. There’s tiny green bugs. Natural enemies, including common lady beetles, lacewings, syrphid flies, and many parasitic wasps, can help suppress aphid populations infesting leafy vegetables. Some are reddish, pinkish, or brown. Disclaimers: As an Amazon associate I earn from qualifying purchases. The Aphididae family of insects is incredibly wide. On the looser leaved varieties, such as Cos and Butterhead, just tease out some of the younger, central leaves. There’s over 4400 species of aphids, about 250 of which are destructive on most common garden plants. Monitoring and Treatment Decisions. 5 Restaurant Recipes you can Make at Home, Website Designed by Natalie McGuire Designs. Potential aphid problems can sometimes be avoided with preventative cultural practices. Start With Prevention When sampling for aphids, inspection of the whole plant is important. Being inside the lettuce head protects these aphids from predators and parasitoids; and their presence is considered a contaminant when heads are harvested. This aphid can be green as well as red, and will be usually found in large colonies inside the heart of the lettuce head. Green to orange to pink aphids act as virus vectors often assisting in the varies. Policy | TERMS & CONDITIONS | Disclaimers: as an Amazon associate I earn from qualifying purchases species can viruses! 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