Great Lakes Entomologist
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Vol. 17, No.4 Winter 1984 THE GREAT LAKES ENTOMOLOGIST PCBLISHED BY THE ~IICHIGAN EXTO~fOLOGICAL SOCIETY THE GREAT LAKES ENTOMOLOGIST Published by the Michigan Entomological Society Volume 17 ~o. ..J ISSN 0090.0222 TABLE OF CONTENTS Cantharidin and Insects: An Historical Re\'iew Daniel K. Young ....................................... .......... l~- Field Records and Observations of Insects Associated with Cantharidin Daniel K. Young .............................. ....................... 19:" Visual Recognition of Females by .\tale Calopteryx maculata (Odonata; Calopterygidae, Janette Ballou ......................... ...................... ........ .. :01 Comparison of Leafhopper Species Complexes in the Ground Cover of Sprayed and Crr;pr3Y~ Peach Orchards in '\lichigan IHomoptera: Cicadellidae) Thomas ~f, ~fov.1}· and ~fark E. Whalon .. ,.. .. " ..... ,',............... 2l:r:: Drift of Riffle Beetles (Coleoptera: Elmidae) in a Small Illinois Stream Dennis L .:\"ewman and Richard C. Funk ......................... .. :11 Effects of Aprons on Pitfall Trap Catches of Carabid Beetles in Forests and Fields Marc E. Epstein and Herbert M. Kulman .... .......................... :1:" Detection of Bronze Birch Borer Larvae and Pupae by Radiographs (Coleoptera: Burrc;~~, John Ball and Gary Simmons ............................ .............. ..:::::..; Some Light and Tcmperarure Effects on the Behavior of the Adult Pales WeeviL H,;',,·t;iJ<S ;0.;1"5 (Coleoptera: Curculionidae) Jeffrey A. Comeil and Louis F. Wilson ... , ....... , .. , .... , .. ,. "'" . ""';; Live Branches on Pine Stumps Deter Pales Weevil Breeding in Michigan (Coleoptera: Cu:r;:uli0!tiJae, Jeffrey A. Corneil and Louis F. Wilson... .. ............ ~"'9 Notes on Microtonus spp. (Hymenoptera: Braconidae) Introduced to Iowa against the Al!a:!:' Wee.iI. Hypera postica (Coleoptera: Curculionidae James W. Mertins ..... , . , ............ __ 23.3 Effect of White Spruce Release on Subsequent Defoliation by the Yellowheaded Spru..~ S""'11y. Pikonema alaskensis (Hymenoptera: Tenthredinidae) B. W, Morse and H. ~L Kulman ... , ...... , . :35 The Economics of Spruce Budworm Outbreaks in the Late States: An Overview D. J. Huff, B. A. Montgomery. J. A. Witter, & G. R. Gregory... .. .... 239 Index to Authors, Volume 17 ............................... , ............... Index to Anthropod Taxa, Volume 17 ....... .......... .. .:5 COVER ILL[;STRATION Ecpantheria scribonia (Stoll) (Lepidoptera: Arctiidae). Photographed by D. C. L G..">5ling. PUBLICAnON DATES Volume 17. Number 2 July 1984 Volume 17, Number 3 9 October 1984 THE MICHIGAN ENTOMOLOGICAL SOCIETY 1984-85 OFFICERS President David A. Evans President-Elect David P. Cowen Executive Secretary M. C. Nielsen Journal Editor D. C. L. Gosling Newsletter Editor Louis F. Wilson The Michigan Entomological Society traces its origins to the old Detroit Entomological Society and was organized on 4 November 1954 to "... promote the SCIence of entomology in all its hranches and by all feasible means. and to advance cooperation and good fellowship among persons interested in entomology." The Society attempts to facilitate the exchange of ideas and information in both amateur and professional circles. and encourages the study of insects by youth. Membership in tbe Society. which serves the North Central States and adjacent Canada. IS open to all persons interested in entomology. There are four paying classes of membership: Student {including those currently enrolled as college sophomoresl-annual dues $4.00 Active·-annual dues $8.00 Institutional-annual dues 520.00 Sustaining-annual contribution 525.00 or more Dues are paid on a calendar year basis (Jan. I-Dec. 31). Memberships accepted before July I shall begin on the preceding January I: member>hips accepted at a later date shall begin the following January I unless the earlier date is requested and the required dues are paid. All members in good standing receive the News/etler of the Society. published quarterly. All Active and Sustaining Members may vote in Society affairs. All dues and contributions to the Society are deductible for Federal income tax purposes. SUBSCRIPTION INFORMATION Institutions and organizations. as well as individuals not desiring the benefits of membership. may subscribe to The Great Lakes Entomologis/ at the rate of $15 .00 per volume. The journal is published quarterly; SUbscriptions are accepted only on a volume (4 issue) basis. Single copies of The Great Lakes Emomoiogist are available at $4.25 each. with a 20 percent discount for 25 or more copies sent to a single address. MICROFILM EDITION: Positive microfilm copIes of the current volume of The Grew Lakes Entomologist will be available at nominal cost. to members and bona fide subscribers of the paper edition only. at the end of each volume year. Please address all orders and inquiries to University Microfilms. Inc .. 300 North Zeeb Road. Ann Arbor, Michigan 48106. USA. Inquiries about back numbers, subscriptions and Society business should be directed to the Executive Secretary. Michigan Entomological Society. Department of Entomology. Michigan State University. East Lansing. \1ichigan 48824, USA. Manuscripts and related correspondence should be dll'ected to the Editor (see inside back cover). Copyright © 1984. The Michigan Entomological Society 1984 THE GREAT LAKES ENTOMOLOGIST 187 CANTHARIDIN AND INSECTS: AN HISTORICAL REVIEW Daniel K. Young l ABSTRACT TIl.; defensive role played by cantharidin in meloid and oedemerid beetles has been well OOc\l11lenti!d. However. several groups of insects are known to orient positively toward the cberrrical or to the beetles which produce it: Miridae (Hemiptera); Pyrochroidae, An thicidae ,Coleoptera): Ceratopogonidae, Anthomyiidae (Diptera); and Braconidae tHymeoopteral. Literature citations are summarized for each of these taxa using current nomencla.tun: and indicating the nature of the association. \\rule re'.ie....ing literature pertinent to research on the systematics and bionomics of the genus Pedilu..s IColeoptera: Pyrochroidae), an intriguing association with a blister beetle I.\feloidael came to my attention. It involved the type specimen of P. impressus which was foond attached to the side of a Meloe angusticollis (Say 1827). SUb5.equent reading revealed that several groups of insects have been observed in ass.ociatioo ....ith meloids. The primary stimulus involved in every case appears to be cantharidm. the blister-causing compound evolved by the Meloidae as a cherrrical defense mechanism. Although long thought to be a bicyclical monoterpene, recent research has shown that famesol is the biosynthetic precursor of cantharidin (Sticher 1977). Thus, cantha...Jdin mIN be considered a sesquiterpenoid derivative. Cantharidin .... as first isolated from Lytta vesicatoria (L.), the green Spanish-fly, by Robiquet in 18\0. The creature is actually not a fly at all but a rather common European blister be.:etle, Beauregard (1890) stated that cantharidin was produced in the third pair of serrrinal '.esi..:1es of the adult male and in the copulatory vesicle and ovaries of the adult female. V,lrile bod! sexes contain the compound, data have been presented to suggest that biosynthesis takes place primarily in the accessory glands of the adult male (Sierra et al. 19761. TIl.; compound may also be produced by the larval stages (Meyer et aL 1968), but Sierra's groop found that cantharidin biosynthesized in males was transferred to females, which were unable to biosynthesize cantharidin from any terpenoid precursors, The chem ical is knov.n 10 o.."'CUf in all developmental stages of the majority of meloids analytically examined 1~Ia~er & Johansen 1977, and references cited therein). CIJeDOI: ! 18901 v.as probably one of the first to recognize cantharidin's probable defensi\'e function. He noted that when provoked or attacked, Meloe proscarabeus L. exuded C3IlI:baridin-containing hemolymph from the tibiotarsal articulations. He further oIYs.en·oo !hat most reptiles and carnivorous insects disliked the substance intensely and hypodJesized !hat such an effective means of defense might compensate for the short elytra and general soft-bodiedness of Meloe and other vesicating species. Such an evolu tiOIllll1 strategy is perhaps analogous to the repugnatorial stink glands of cantharids (Sule 1~91. anodler generally soft-bodied, "loosely-constructed" group. When applied to certain ~"'t5, cantharidin reportedly acts as a potent nerve poison; its potential as an insecti..ide has been discnssed by Gomitz (1937). Carrel and Eisner (1974) also demon sl.IaIeti canIharidin 10 be a potent feeding deterrent to insects, with concentrations effective at 10': .\1. Further expression of the defensive role cantharidin plays in meloids is manifest in their characteristic aggregating behavior (Selander & Mathieu 1969:45), which strongly :~m (>1 F.l1wmology. Cniversity of Wisconsin. Madison, WI 53706. 188 THE GREAT LAKES ENTOMOLOGIST Vol. 17, Ko. 4 resembles the behavioral strategy described by Eisner and Kafatos (1962) for the aposematic and distasteful Lycus loripes (Chevrolat). Even with the evolution of this elaborate chemical defense mechanism there occur in nature several paradoxes. Members of six families representing four orders have been attracted to mel aid beetles, cantharidin, or both. HEMIPTERA MIRIDAE Cantharidin-orienting Hemiptera belong to the Miridae or plant bugs, which are pri marily a phytophagous group as the common name suggests. However, whether mirids are primitively phytophagous