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Showing papers on "Lepidoptera genitalia published in 1967"


Journal ArticleDOI
TL;DR: The authors found that the wild flowers that are food sources for adult parasites influence the extent to which host Lepidoptera are parasitized in unsprayed orchards, and that about 18 times as many tent caterpillar pupae were parasitized by wild flowers as in fields with poor floral undergrowths.
Abstract: Surveys in unsprayed orchards showed that the wild flowers that are food sources for adult parasites influence the extent to which host Lepidoptera are parasitized. Proportionately about 18 times as many tent caterpillar pupae were parasitized in orchards with rich undergrowths of wild flowers as in orchards with poor floral undergrowths. The corresponding figures for tent caterpillar egg parasitisms were about 4 to 1, and for codling moth larvae about 5 to 1. Orchards with average undergrowths of wild flowers produced intermediate figures.

146 citations








Journal ArticleDOI
TL;DR: Caterpillars of three different species have three peripheral nerve cells in their third antennal segment, which can be stimulated by decreasing temperatures, which exert inhibitory effects on their spontaneous activity.

39 citations



Journal ArticleDOI
01 May 1967-Steroids
TL;DR: The insect hormone activity of ponasterones A, B and C isolated from the plant, Podocarpus Nakaii HAY, has been examined using the house-fly and silkworm as test organisms and all three showed very high activity.

26 citations




Journal ArticleDOI
TL;DR: Sixty-nine species of primary insect parasites and 12 associated hyperparasites of the armyworm, Pseudaletia unipuncta (Haw.), are listed and seven secondary parasites and their primary parasite hosts are discussed.
Abstract: Sixty-nine species of primary insect parasites and 12 associated hyperparasites of the armyworm, Pseudaletia unipuncta (Haw.), are listed. All the species occur in the United States or Canada or both; two have been recorded from the host only in Hawaii.Observations on 23 of the primary species in Canada are reported with particular reference to host-parasite relationships, general distribution, and the degree of parasitism by the principal species. Seven secondary parasites and their primary parasite hosts are discussed.


Journal ArticleDOI
TL;DR: In this paper, the cephalic structures, spiracles and skins of the final-instar larvae of 28 species of Acrobasis spp. were described and illustrated.
Abstract: Parasites of Acrobasis spp. found in the Ottawa, Ont., area are separated by using characters of the parasite remains left in the host cases from which the parasites emerged. Characteristics of the cephalic structures, spiracles and skins of final-instar larvae of 28 species of parasites are described and illustrated in this paper; one species was described and illustrated in an earlier paper (Finlayson 1962); and one species is described from the literature. A record of all known species of Acrobasis parasitized by the species treated in this paper is tabulated.








Journal ArticleDOI
TL;DR: In comparing findings of the present species as the more northern insect, study with information in the literature, a difference was found in the number of setae present on pupae of so-called abietella of Florida and pupae in northern United States and Canada.
Abstract: Detailed descriptions, figures, and a key are given for the pupae of Dioryctria zimmermani (Grote), D. amatella (Hulst), D. disclusa Heinrich, D. clarioralis (Walker), D. pygmaeella Ragonot, and D. abietella (Denis and Schiffermuller). In comparing findings of the present species as the more northern insect, study with information in the literature, a difference was found in the number of setae present on pupae of so-called abietella of Florida and pupae of abietella ( abietivorella ) of northern United States and Canada. This apparently isolated population in the South possibly is not the same species as the more northern insect.

Journal ArticleDOI
TL;DR: Experimentation failed to confirm the presence of masking compounds in extracts of abdomen tip extracts of females of Heliothis zea and H. virescens, preventing males from making normal responses to the extracts.
Abstract: Previous reports have indicated that inactive compounds in extracts of the abdomen tips of females of Heliothis zea (Boddie) and H. virescens (F.) may mask the sex pheromone, preventing males from making normal responses to the extracts. Experimentation, including the assay of fractions of abdomen tip extracts that were separated by gas chromatography and subsequently recombined, failed to confirm the presence of such masking compounds.


Journal ArticleDOI
TL;DR: 幼虫期の生息密度を変えることによって体色や発育がどんな影響をうけるかを調べたところ,明らかに密kas�に依存した変異がみられた。
Abstract: 従来スズメガ類では密度依存的な多型現象が知られていなかったが,オオスカシバについて幼虫期の生息密度を変えることによって体色や発育がどんな影響をうけるかを調べたところ,明らかに密度に依存した変異がみられた。すなわち,1令期から集合状態で育った幼虫は体色が2令期から黒化し,摂食量や酸素消費量が少なく,幼虫および蛹の体重が軽いほか,死亡率がきわめて高い。したがって単独生育下で多く出現する通常の淡緑色幼虫が本種の生活により適応していると考えられる。