Insect Hotline Issue 24

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Acer with die-back caused by Japanese maple scale infestations.

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Close-up of an Acer branch with gloomy scale (dark circular raised) and Japanese maple scale (brownish is the underlying skin after waxy white has been wiped or worn away).  Japanese maple scale are also the white kind of oyster shaped insect on the branch.

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Close-up of an Acer trunk heavily infested with Japanese Maple scale.

Japanese maple scale

Close-up of Japanese maple scale on a Cornus trunk.  The brownish colored insects are the same scale, but where the white waxy covering has been worn or wiped away.  All pictures were provided by:  Brian Kunkel, Ornamentals IPM Extension Specialist, University of Delaware

Insect Hotline Issue 17

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Hibiscus sawfly adult.  Photo provided by:  Rose Hiskes, Diagnostician, Horticulturist at The Connecticut Agricultural Experiment Station

 

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Cocoons (pupae) of hibiscus sawflies.  Photo provided by:  Rose Hiskes, Diagnostician, Horticulturist at The Connecticut Agricultural Experiment Station

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Egg laying sites of hibiscus sawflies.  Photo provided by:  Rose Hiskes, Diagnostician, Horticulturist at The Connecticut Agricultural Experiment Station

 

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Hibiscus sawfly larvae.  Notice the rows of black tufts/spines on the body.  Photos by Brian Kunkel, University of Delaware

Insect Hotline Issue 16

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Masked chafer white grub (notice lack of pattern of the spines)

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Japanese beetle white grub (notice the v-shaped pattern to the spines)

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Oriental beetle white grub (notice the parallel lines of spines)

These are three common white grub species that may be found in turfgrass.

Insect Hotline Issue 15

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Pupal skin sticking out of the trunk of a tree.  Insect has emerged from the pupal skin which is left in the tree.  Photo provided by Whitney Cranshaw, Colorado State University, bugwood.org

 

 

ash borer, Podosesia syringae  (Lepidoptera: Sesiidae) - 1304043

Adult Lilac/ash borer, Podosesia syringae, pinned for viewing.  Photo provided by:  Carroll Younce, USDA-ARS, bugwood.org