Lepidoptera genitalia

About: Lepidoptera genitalia is a research topic. Over the lifetime, 10114 publications have been published within this topic receiving 78876 citations. The topic is also known as: Uncus.

Sub-lethal effects of SpltMNPV infection on developmental stages of Spodoptera litura (Lepidoptera: Noctuidae)

Abstract: Application of different doses of SpltMNPV on final instars of Spodoptera litura showed dose-related mortality. A significant increase in the time for pupation and progeny mortality as well as reduced fecundity was observed in surviving larvae. Impact of sublethal doses on subsequent generation needs attention in designing baculovirus-based pest management.

Parasitoids of Uraba lugens Walker (Lepidoptera: Noctuidae) in South Australia, with description of two new species of Braconidae

Abstract: Information is presented on the large complex of hymenopteran and dipteran parasitoids associated with Uraba lugens Walker (the gumleaf skeletonizer) in South Australia

Japanese species of the subfamily oecophyllembiinae réal et balachowsky (lepidoptera : gracillariidae), with descriptions of a new genus and eight new species

Abstract: KUMATA, T. 1998. Japanese species of the subfamily Oecophyllembiinae Real et Balachowsky (Lepidoptera: Gracillariidae), with descriptions of a new genus and eight new species. Ins. matsum. n. s. 54: 77 131,27 figs. (11 text-figs., 16 pIs.). The subfamily Oecophyllembiinae is redefined to receive the genera Metriochroa Braun (= Oecophyllembius Silvestri), Cryphiomystis Meyrick, Guttigera Diakonoff, Prophyllocnistis Davis and Eumetriochroa (gen. nov.) on the basis of the hind wing venation and the larval thoracic spiracles. So far as the larvae of eight species belonging to this subfamily are examined, thoracic spiracles are not opened on the prothorax, but on the mesothorax at the anterolateral areas in both the sap-feeding and spinning morphs. The thoracic spiracles opened on the mesothorax in lepidopterous larvae may be a new discovery to the entomological science. Four species of Eumetriochroa, two of Metriochroa and two of Cryphiomystis are dealt with in this paper, and all the species are new to science. Larvae of Japanese species are all leaf-miners on various arboreal plants mainly belonging to the families Rubiaceae or Oleaceae. Photographs of the moths and leaf-mines, and also drawings of the wing venations and genitalia, are given for all the species. Larval photographs are also provided for some species to show the thoracic spiracles. A tentative list of the world species of the subfamily is given in Appendix I, and a list of food plants of these species is also given in Appendix ll. Author's address. 45-16, Bunkyodai-Minamirnati, Ebetu City, Hokkaido, 069-0835 Japan.

Malathion Resistance in Larvae of Some Southern Minnesota Populations of the Indianmeal Moth, Plodia Interpunctella (Lepidoptera: Pyralidae), Infesting Bulk-Stored Shelled Corn

Abstract: Larvae of 21 field collected populations of the Indianmeal moth, Plodia in erpunctella, infesting stored shelled corn in southern Minnesota were tested for their susceptibility to malathion in the laboratory. A population that was a composite of the 21 populations and a malathion susceptible population were also tested for their susceptibility to malathion, pirimiphos-methyl and chlorpyrifos-methyl. Comparison of the LD values of the field populations with the malathion susceptible population indicated that the field populations were ca. 33to 625-fold resistant to malathion. The composite field population was ca. 243-fold resistant to malathion, and this population was 3.2-fold cross-resistant to pirimiphos-methyl, but was highly susceptible to chlorpyrifos-methyl. The Indianmeal moth, Plodia interpunctella (Hubner), is a destructive pest of stored-grain whose larvae cause damage by feeding on the germ and endosperm f grain (Demianyk & S nha 1981, Madrid & Sinha 1982). Wandering last instar larvae of P. interpunctella produce abundant webbing on the grain surface, and in severe infestations the entire grain surface is covered with a layer of webbing. In Minnesota, P. interpunctella is the third most commonly occurring insect infesting stored shelled corn (Barak & Harein 1981). The severity of this pest in the United States is compounded by the development of resistance in larvae to malathion, an organophosphate insecticide registered for use on grain since the late 1950's (Zettler et al. 1973, Bansode et al. 1981, Beeman & Schmidt 1982, Beeman et al. 1982, Zettler 1982). Zettler et al. (1973) reported about 206-fold malathion resistance in P. interpunctella larvae infesting peanutand grain-storages in Georgia, Alabama, Florida, Kansas, and Illinois. Armstrong & Soderstrom (1975) reported malathion resistance in 3 of 5 field populations of P. interpunctella infesting dried fruits and nuts in California, and in the laboratory they showed the stability of this resistance in the absence of malathion selection. Bansode et al. (1981) reported > 227-fold resistance to malathion in a composite field population of P. interpunctella. Beeman et al. (1982) found> 17-fold malathion resistance in 39 of the 43 populations of P. interpunctella collected from grain storages in the northcentral United States. Ten of 12 populations of P. interpunctella infesting peanuts in the Southeastern United States were> 114-fold resistant to malathion (Zettler 1982). Some P. interpunctella populations collected from grain storages in Minnesota were tested for their resistance to malathion (Beeman & Schmidt 1982, Beeman et al. 1982). 'Mention of a proprietary product does not constitute an endorsement by the University of Minnesota. 2Department of Entomology, University of Minnesota, St. Paul, Minnesota 55108. 1 Sumner et al.: Malathion Resistance in Larvae of Some Southern Minnesota Populat Published by ValpoScholar, 1988 134 THE GREAT LAKES ENTOMOLOGIST Vol. 21, No.3 Beeman & Schmidt (1982) tested susceptibility of 13 field populations of P. interpunc­ tella from Minnesota to malathion at a discriminating dose of 20 f.L per larva (LDso x 4). Mortality of II of the 13 populations varied from 0-69% indicating resistance. Two populations were susceptible showing 91-100% mortality. In this paper, we report on the resistance to malathion in several populations of P. interpunctella larvae infesting shelled corn in southern Minnesota. In addition, we evaluated cross-resistance of a composite field population to two new organophosphate grain protectants-pirimiphos-methyl and chlorpyrifos-methyl. MATERIALS AND METHODS