Aspectos da interação entre especies de Chrysomelinae (Coleoptera : Chrysomelidae) e plantas da familia Solanaceae na Serra do Japi, Jundiai, SP

Orientador : João Vasconcellos NetoDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de BiologiaResumo: Aspectos da interação entre cinco espécies de Chrysomelinae (Coleoptera: Chrysomelidae) e Solanaceae foram estudados no período de abril de 1988 a maio de 1989, na mata da Serra do Japí, Município de Jundiaí, Estado de São Paulo. Larvas e adultos das cinco espécies de Chrysomelinae encontradas alimentaram-se em hospedeiras do gênero Solanum. Uma delas, Stychotaenia Quadrisianata tem atividade sómente no período noturno e portanto não foi estudada em detalhes. Stychotaenia Quadrisianata, Prosaicela cruciaara e Pnitidissima são espécies monófagas, alimentando-se respectivamente de Solanum variabile, S. decompositiflorum e S. bullatum. Platyphor.antomozans e P niaronotata utilizaram mais de uma espécie de planta hospedeira, porém mostraram preferências alimentares distintas. ... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digitalAbstract: Some aspects of the interaction between five species of Chysomelinae (Coleoptera: Chrysomelidae) and Solanaceae have been studied from April 1988 to May 1989, in the Serra do Japí forest, State of São Paulo, Brazil.Larvae and adults of five species of Chrysomelineae were found feeding on host plants of the genus Solanum. One of them,Stychotaenia Quadrisianata was active only during the night and has not been studied in detail. Stychotaenia QuadriBianata, ProBeicela cruciaera and Platyhora nitidissima are monophagous species, feeding on Solanum variabil.,S. decompositiflorum and S. bullatum, respectively. Platyphora ana.tomo.an. and E. niaronotata feed on more than one host plant,but have different preferences. ... Note: The complete abstract is available with the full electronic digital thesis or dissertationsMestradoMestre em Ciências Biológica

Leaf selection and daily variation on feeding and oviposition of Gratiana spadicea (Klug) (Coleoptera, Chrysomelidae, Cassidinae)

Gratiana spadicea(Klug) (Coleoptera, Chrysomelidae) is a monophagous beetle that feeds only on leaves of Solanum sisymbriifolium Lamarck (Solanaceae). We determined the portions of S. sisymbriifolium leaves that are used by the adults as feeding and oviposition sites. Daily variation on larval and adult feeding frequency, and on oviposition, was also registered under laboratory conditions (25oC; 70+10% rh). Larvae and adults were fed with S. sisymbriifolium leaves during photo (14 hours) and scotophase (10 hours). At the end of each phase, it was measured the leaf area they ate and registered position of their feeding marks on leaves. The oothecae were counted and noted, regarding their position on the leaf blade. Larvae and adults of G. spadicea showed feeding activity during photo and scotophase. Oviposition was restricted to photophase. Females leaf consumption rates were greater than those of the males. Adult feeding marks were most frequent on leaf margins. Oothecae were most frequently found near the central vein of the abaxial leaf surface. Daily ingestion rates grew exponentially through the larval stage; fifth instar ingested more than 60% of the total amount of food consumed by the larval stage. The possible adaptive mechanisms involved in such feeding and oviposition patterns are discussed

Adaptations of two specialist herbivores to movement on the hairy leaf surface of their host, Solanum guaraniticum Hassl (Solanaceae)

Plant trichomes can difficult the attachment and movement of small insects. Here, we examine the hypothesis that the success on the use of densely haired hosts by two cassidine species is determined by differential morphology and behavior. Larvae of Gratiana graminea (Klug, 1829) and Gratiana conformis (Boheman, 1854) move on the leaf surface of their host, Solanum guaraniticum Hassl by anchoring their tarsungulus on the trichome rays or by inserting the tarsungulus tip directly into epidermis. This kind of movement is only possible due to a similar tarsungulus shape among the species. Tarsungulus growth pattern is also similar between species, being relatively small on the posterior aperture, matching the diameter of the host plant trichome rays. The tarsungulus shape associated with differences on ontogenetic growth and attachment pattern allow these two Cassidinae larvae to efficiently move on the pubescent leaf surface of their host

Fig. 1 in Larval Feeding Behavior of Gratiana spadicea (Klug) (Coleoptera: Chrysomelidae: Cassidinae) on its Host Plant, Solanum sisymbriifolium Lamarck (Solanaceae): Interaction with Trichomes

Fig. 1. Scanning electron micrographs of leaf discs of Solanum sisymbriifolium used in feeding choice trials. a) High density stellate trichomes (HD) ¼ 29.7/mm2; b) low density stellate trichomes (LD) ¼ 1.07/mm2; c) submitted to mechanical removal of stellate trichomes (Bars ¼ 100 µm).Published as part of <i>Medeiros, Lenice & Moreira, Gilson R. P., 2005, Larval Feeding Behavior of Gratiana spadicea (Klug) (Coleoptera: Chrysomelidae: Cassidinae) on its Host Plant, Solanum sisymbriifolium Lamarck (Solanaceae): Interaction with Trichomes, pp. 339-350 in The Coleopterists Bulletin 59 (2)</i> on page 342, DOI: 10.1649/778.1, <a href="http://zenodo.org/record/10105141">http://zenodo.org/record/10105141</a&gt

Fig. 2 in Larval Feeding Behavior of Gratiana spadicea (Klug) (Coleoptera: Chrysomelidae: Cassidinae) on its Host Plant, Solanum sisymbriifolium Lamarck (Solanaceae): Interaction with Trichomes

Fig. 2. Characteristics of the stellate trichomes removed by Gratiana spadicea (n ¼ 20 perPublished as part of <i>Medeiros, Lenice & Moreira, Gilson R. P., 2005, Larval Feeding Behavior of Gratiana spadicea (Klug) (Coleoptera: Chrysomelidae: Cassidinae) on its Host Plant, Solanum sisymbriifolium Lamarck (Solanaceae): Interaction with Trichomes, pp. 339-350 in The Coleopterists Bulletin 59 (2)</i> on page 343, DOI: 10.1649/778.1, <a href="http://zenodo.org/record/10105141">http://zenodo.org/record/10105141</a&gt

Larval Feeding Behavior of Gratiana spadicea (Klug) (Coleoptera: Chrysomelidae: Cassidinae) on its Host Plant, Solanum sisymbriifolium Lamarck (Solanaceae): Interaction with Trichomes

Medeiros, Lenice, Moreira, Gilson R. P. (2005): Larval Feeding Behavior of Gratiana spadicea (Klug) (Coleoptera: Chrysomelidae: Cassidinae) on its Host Plant, Solanum sisymbriifolium Lamarck (Solanaceae): Interaction with Trichomes. The Coleopterists Bulletin 59 (2): 339-350, DOI: 10.1649/778.1, URL: http://dx.doi.org/10.1649/778.

Fig. 3 in Larval Feeding Behavior of Gratiana spadicea (Klug) (Coleoptera: Chrysomelidae: Cassidinae) on its Host Plant, Solanum sisymbriifolium Lamarck (Solanaceae): Interaction with Trichomes

Fig. 3. Leaf damage of Gratiana spadicea on Solanum sisymbriifolium leaf. a) Feeding site cleared by a first instar larva; b) detail (enlargement of the area marked in a) of a corresponding macerated lateral ray (arrow). (Bars ¼ 100 µm and 50 µm, respectively).Published as part of <i>Medeiros, Lenice & Moreira, Gilson R. P., 2005, Larval Feeding Behavior of Gratiana spadicea (Klug) (Coleoptera: Chrysomelidae: Cassidinae) on its Host Plant, Solanum sisymbriifolium Lamarck (Solanaceae): Interaction with Trichomes, pp. 339-350 in The Coleopterists Bulletin 59 (2)</i> on page 344, DOI: 10.1649/778.1, <a href="http://zenodo.org/record/10105141">http://zenodo.org/record/10105141</a&gt

Fig. 4 in Larval Feeding Behavior of Gratiana spadicea (Klug) (Coleoptera: Chrysomelidae: Cassidinae) on its Host Plant, Solanum sisymbriifolium Lamarck (Solanaceae): Interaction with Trichomes

Fig. 4. Survivorship curves of Gratiana spadicea larvae fed with intact Solanum sisymbriifolium leaf discs and with leaf discs submitted to mechanical and chemical removal of the trichomes and their exudates, and to trichomes mechanical control. Treatments followed by the same letters do not differ significantly (log rank tests, Oi ¼ 0.05).Published as part of <i>Medeiros, Lenice & Moreira, Gilson R. P., 2005, Larval Feeding Behavior of Gratiana spadicea (Klug) (Coleoptera: Chrysomelidae: Cassidinae) on its Host Plant, Solanum sisymbriifolium Lamarck (Solanaceae): Interaction with Trichomes, pp. 339-350 in The Coleopterists Bulletin 59 (2)</i> on page 346, DOI: 10.1649/778.1, <a href="http://zenodo.org/record/10105141">http://zenodo.org/record/10105141</a&gt