Novel antennal lobe substructures revealed in the small hive beetle Aethina tumida

The small hive beetle, Aethina tumida, is an emerging pest of social bee colonies. A. tumida shows a specialized life style for which olfaction seems to play a crucial role. To better understand the olfactory system of the beetle, we used immunohistochemistry and 3-D reconstruction to analyze brain structures, especially the paired antennal lobes (AL), which represent the first integration centers for odor information in the insect brain. The basic neuroarchitecture of the A. tumida brain compares well to the typical beetle and insect brain. In comparison to other insects, the AL are relatively large in relationship to other brain areas, suggesting that olfaction is of major importance for the beetle. The AL of both sexes contain about 70 olfactory glomeruli with no obvious size differences of the glomeruli between sexes. Similar to all other insects including beetles, immunostaining with an antiserum against serotonin revealed a large cell that projects from one AL to the contralateral AL to densely innervate all glomeruli. Immunostaining with an antiserum against tachykinin-related peptides (TKRP) revealed hitherto unknown structures in the AL. Small TKRP-immunoreactive spherical substructures are in both sexes evenly distributed within all glomeruli. The source for these immunoreactive islets is very likely a group of about 80 local AL interneurons. We offer two hypotheses on the function of such structures.

Final environmental impact statement for the suppression of the Southern pine beetle, Southern Region.

"February 1987."

Southern Pine Beetle : final report /

"30 September 1984."

The ecology and morphology of Thinobius frizzelli Hatch, an interidal beetle.

Errata slips inserted.

Bark beetles and ambrosia beetles (Coleoptera: Scolytoidea): with special references to species occurring in North Carolina,

Bibliography: p. [162]-167.

[The Alder Flea-beetle]

Part I is reprinted from Bulletin 265 of the Maine Agricultural Station. Part II is from the Annals of the Entomological Society of America, vol. XI, no.3, 1918.

The Southern pine beetle /

Includes bibliographies and index.

A sequence of destruction : mountain pine beetle and wildfire : Yellowstone National Park /

"9/93"--P. [2] of cover.

Site, stand, and host characteristics of southern pine beetle infestations /

"Southern pine beetle handbook"--Cover.

Integrating control of the Japanese beetle : a historical review /

Item 16

Managing the Japanese beetle : a homeowner's handbook.

Shipping list no.: 97-0322-P.

Biology and control of the western pine beetle : a summary of the first fifty years of research /

Includes bibliographical references (p. 355-381).

Bioassay of soil containing residues of chlorinated hydrocarbon insecticides : with special reference to control of Japanese beetle grubs /

Literature cited: p. 38-44.

Modeling southern pine beetle populations, symposium proceedings : Asheville, N.C., February 20-22, 1980 /

"September 1980."

Biological control of the Japanese beetle

Bibliography: p. 70-78.