It is the best replacement food when a natural food supply is lacking, and stimulates egg production in ladybugs, lacewings, and other beneficial insects.
Nectar is critical to ladybug reproduction success. Brightly colored flowers entice several animals, from hummingbirds to honeybees, to visit the plants for a nectar treat and potential pollination. Growing only 1/2 inch long, ladybugs (Hippodamia convergens) easily enter tightly constructed flowers, such as tubular flowers, to gain access to nutritious nectar. If you are trying to encourage ladybugs in your garden, plant many flower species to increase nectar supplies. Eggs laid in your garden provide a future ladybug population to protect your flower and vegetable gardens. In order for ladybugs to mature and lay eggs, they need nectar and pollen sources. This is normally supplied by a wide range of sources such as flowering plants and legumes (peas, beans, clover, alfalfa). Early evening is the best time to release ladybugs, and gives them all night to settle in, find food and water, and realize they've found a good home (your garden). Ladybugs are usually thirsty from their long journey and storage, and appreciate moist places to drink. It is possible for ladybugs to have a lull in their aphid diet, so they must use flower nectar for sustenance. Common garden plants, such as fennel (Foeniculum vulgare), which grows in U.S. Department of Agriculture plant hardiness zones 5 through 10, provide nectar-rich flowers to keep the ladybug population fed. If you are trying to encourage ladybugs in your garden, plant many flower species to increase nectar supplies. Eggs laid in your garden provide a future ladybug population to protect your flower and vegetable gardens. Lady bugs and man made ladybug nectar. I joined the beneficial bug club and bought a bag of 1500 lady bugs from Calloways. I also bought a bag of what they called lady bug nectar, both distributed by the same company. I put out a good bit of the nectar, which is a powder, early in the morning when dew is on the leaves and the nectar sticks. I've been letting the lady bugs out day by day in different places. I'd noticed that lettuce had a bunch of aphids on it and the lady bugs seem to be congregating there as if for a feast. Even better, I've had tons of bees, several kinds too (and a few kinds of wasps, which I'm less excited about), showing up and they definitely seem attracted to the nectar. Ladybugs are known for their appetite for aphids and you can use ladybugs as a form of natural pest control against these plant-damaging insects. A ladybug can consume up to 5,000 aphids in a lifetime, eating them in both its larval and adult stage. If you are trying to encourage ladybugs in your garden, plant many flower species to increase nectar supplies. Eggs laid in your garden provide a future ladybug population to protect your flower and vegetable gardens. Ladybug Nectar is a specially formulized nutritional supplement. This nutrient rich food successfully substitutes for many of the nutrients found in natural nectars, pollen, and honeydew (aphid waste). It is the best replacement food when a natural food supply is lacking, and stimulates egg production in ladybugs, lacewings, and other beneficial insects. Many beneficial insect species search out, and feed on a combination of natural nectars, pollen, and honeydew. This sticky liquid is often found dripping from your trees and plants. It includes many nutrients that are necessary to the insect eco-system. Ladybug Nectar simulates a mixture of natural nectars, pollen, and honeydew that attract many beneficial insects who seek out these nutrient rich foods. Ladybugs. See our two sizes of ladybug packages and learn about how much you need. This nutrient rich food successfully substitutes for many of the nutrients found in natural nectars, pollen, and honeydew (aphid waste). It is the best replacement food when a natural food supply is lacking, and stimulates egg production in ladybugs, lacewings, and other beneficial insects. Beetles are the largest group of pollinators. The ladybug above drinks nectar and eats pollen, in addition to being a beneficial insect that also eats garden pests. Beetles prefer flowers with lots of pollen, dull white or green in color, and mild in odor.  They pose no harm and are actually beneficial to your plants by feasting on a few of your plant's nemeses such as aphids, mealybugs, leaf hoppers, scales and mites. Along with insects, ladybugs also look for pollen for a food source, so there are numerous plants you can grow to help attract them. Flowers and herbs such as cilantro, dill, fennel, caraway, yarrow, tansy, angelica, scented geraniums, coreopsis and cosmos are good choices for luring the ladybug. 
http://homeguides.sfgate.com/ladybugs-eat-nectar-flowers-73026.html http://www.naturescontrol.com/ladybugs.html http://homeguides.sfgate.com/ladybugs-eat-nectar-flowers-73026.html http://www.tomatoville.com/showthread.php?t=28189 http://homeguides.sfgate.com/ladybugs-eat-nectar-flowers-73026.html http://nwbeneficials.com/nectar.html http://nwbeneficials.com/nectar.html http://kidsgrowingstrong.org/pollinators/ http://www.apartmenttherapy.com/how-to-make-a-ladybug-feeder-attract-them-to-your-garden-169681
what is ladybug nectar for ladybugs