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Japanese Beetle

Popillia japonica


The beetle species Popillia japonica is commonly known as the Japanese beetle. It is about 15 millimetres (0.6 in) long and 10 millimetres (0.4 in) wide, with iridescent copper-colored elytra and green thorax and head. It is not very destructive in Japan, where it is controlled by natural predators, but in America it is a serious pest of about 200 species of plants, including rose bushes, grapes, hops, canna, crape myrtles, birch trees, linden trees and others. It is a clumsy flier, dropping several centimeters when it hits a wall. Japanese beetle traps therefore consist of a pair of crossed walls with a bag or plastic container underneath, and are baited with floral scent, pheromone, or both. However, studies conducted at the University of Kentucky and Eastern Illinois University suggest beetles attracted to traps frequently do not end up in the traps, but alight on plants in the vicinity, thus causing more damage along the flight path of the beetles and near the trap than may have occurred if the trap were not present.[1] [2] These insects damage plants by skeletonizing the foliage, that is, consuming only the leaf material between the veins, and may also feed on fruit on the plants if present


Host plants[edit source | editbeta]Japanese beetles feed on a large range of hosts, including leaves of plants of the following common crops:[9] Beans, strawberries, tomatoes, peppers, grapes, hops, roses, cherries, plums, pears, peaches, raspberries, blackberries, corn, peas, birch trees, linden trees, blueberries, and these genera: Abelmoschus Acer Aesculus Alcea Aronia Asimina Asparagus Aster Buddleja Calluna Caladium Canna Chaenomeles Cirsium Cosmos Dahlia Daucus Dendranthema Digitalis Dolichos Echinacea Hemerocallis Heuchera Hibiscus Humulus Hydrangea Ilex Impatiens Ipomoea (morning glory) Iris Lagerstroemia Liatris Ligustrum Malus (apple, crabapple) Malva Myrica Ocimum (basil) Oenothera Parthenocissus Phaseolus Phlox Physocarpus Pistacia Platanus Polygonum Populus Prunus Quercus Ribes (gooseberry, currants, etc.) Rheum Rhododendron Rosa Rubus (raspberry, blackberry, etc.) Salix (willows) Sambucus Sassafras Solanum Syringa Thuja (arborvitae) Tilia Toxicodendron Ulmus Vaccinium Viburnum Vitis Weigelia Wisteria Zea Zinnia



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Spotted by

Michigan, USA

Spotted on Aug 15, 2013
Submitted on Sep 18, 2013

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