Species Cycloneda munda - Polished Lady Beetle

Stehr, W.C. 1930. The Coccinellidae (Ladybird Beetles) of Minnesota. Univ. Minn. Agr. Expt. Sta. Tech. Bull. 75. 54 pp.

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Riddick, E.W., T.E. Cottrell, and K.A. Kidd. 2009. Natural enemies of the Coccinellidae: parasites, pathogens, and parasitoids. Biological Control 51(2): 306–312.

Abstract
We review aspects of the life histories of representative enemies of coccinellids (both entomophagous and phytophagous species) and expose both potential and real effects that they have on life parameters of their hosts. Lady beetles are attacked by a variety of natural enemies (bacteria, fungi, mites, nematodes, protozoa, wasps, flies). Few of these enemies have the ability to alter significantly the population dynamics of their hosts. This review should encourage further research to help define the role of natural enemies in the population dynamics of coccinellids. Ultimately, the conservation of beneficial lady beetles and the management of nuisance and pestiferous ones should be major emphases of research on coccinellid–natural enemy interactions.

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Lundgren, J.G. 2009. Nutritional aspects of non-prey foods in the life histories of predaceous Coccinellidae. Biological Control 51(2): 294–305.

Abstract (part):

Non-prey foods are an integral component of the diets of most predaceous coccinellids. Under field conditions, numerous coccinellids consume nectar, honeydew, pollen, fruit, vegetation, and fungus. These non-prey foods are used by coccinellids to increase survival when prey is scarce, reduce mortality during diapause, fuel migration, and enhance reproductive capacity.