Propolis, A raucaria angustifolia, B accharis dracunculifolia, Eucalyptus citriodora, Botanical Origin Propolis and plant secretions from three species, most frequently mentioned as botanical sources of the bee glue in Brazil (B accharis dracunculifolia, A raucaria angustifolia and E u ca lyptus citriodora) have been investigated using GC-MS. Based on chemical evidence, B. dra cunculifolia was shown to be the main propolis source in Säo Paulo state. The antibacterial and antifungal activities of all four materials were also tested, the most active being propolis and B accharis leaf exudate.

Neotropical Entomology 36 (2):197-202 (2007) A. schrankiae depositavam seus ovos sobre os frutos e as larvas, ao eclodirem, perfuravam o exocarpo, alcançando as sementes. A maioria semente. O maior valor da razão "número de ovos/fruto" e a maior porcentagem de sementes predadas foram registrados em abril. A matéria seca total e das sementes não predadas, a proporção de sementes predadas, quadrantes das copas das árvores. PALAVRAS-CHAVE: Fabaceae, Mimosoideae, herbivoria, interação inseto-planta Acanthoscelides schrankiae Horn. feeding in seeds of Mimosa bimucronata (DC.) Kuntze. We investigated the pattern of oviposition and seed exploitation by A. schrankiae the percentage of predated seeds, the total dry weight of fruits and non-predated seeds, the percentage of aborted seeds, and the percentage of non-emergent insects, among different quadrants of the M. bimucronata canopy. To determine the occurring species, the emergence of bruchids and parasitoids was observed in the laboratory, resulting altogether, only in individuals of A. schrankiae and Horismenus sp. (Hymenoptera:Females of A. schrankiae laid their eggs on fruits, and larvae, after emergence, perforated the exocarp to reach the seeds. Most fruits presented one to three eggs and only one bruchid larva was observed in each seed. The highest value of the rate "number of eggs/fruit" and the highest percentage of predated seeds were recorded in April. Dry weight of fruits (total) and seeds (non-predated), proportions of predated seeds, seed abortions, and non-emergent seed predators, were evenly distributed in the canopy.KEY WORDS: Fabaceae, Mimosoideae, herbivory, insect-plant interaction for regulating plant community structure and composition (Janzen 1971) since it acts as a selective force affecting abundance, distribution and evolution of plants (Harper et al. 1970). Among the most important seed predators are the insects, mainly Coleoptera, Diptera, Lepidoptera, Hymenoptera, Thysanoptera and Hemiptera orders (Janzen 1971, Zhang et al. 1997. Bruchid beetles (Coleoptera) (62 genera worldwide) are

-(Floristic composition of a "cerrado" sensu stricto remnant in Botucatu, SP). A floristic survey of a "cerrado" sensu stricto area was carried out in Botucatu, west-central region of São Paulo State, southeastern Brazil. One-hundredseventy-nine angiosperms taxa (177 species) were recorded distributed in 122 genera and 49 families. Five species of pteridophytes were also collected, belonging to four genera and two families. The woody component was predominant, representing more than 60% of the registered species. The arboreal to non-arboreal species ratio was 1:3. The families with the highest species richness were: Asteraceae (27 species), Fabaceae (22), Myrtaceae (11). The comparison among six cerrado areas revealed great floristic heterogeneity since the similarity indexes produced low values, even among neighboring areas.Key words -"cerrado" floristic, profile diagram, similarity RESUMO -(Composição florística de remanescente de cerrado sensu stricto em Botucatu, SP). Realizou-se o levantamento florístico de uma área remanescente de cerrado sensu stricto no Município de Botucatu, região centro-oeste do Estado de São Paulo, Sudeste do Brasil. Foram registrados 179 táxons de angiospermas (177 espécies) distribuídas em 122 gêneros e 49 famílias e cinco espécies de pteridófitas pertencentes a quatro gêneros e duas famílias. O componente lenhoso foi predominante representando mais de 60% das espécies registradas. A proporção das espécies arbóreas para as não arbóreas foi de 1:3. As famílias com maior riqueza foram: Asteraceae (27 espécies), Fabaceae (22), Myrtaceae (11). A comparação entre seis áreas de cerrado revelou grande heterogeneidade florística uma vez que os índices de similaridade produziram valores baixos, mesmo entre áreas próximas.Palavras-chave -diagrama de perfil, florística do cerrado, similaridade 1.Parte da dissertação de mestrado do primeiro autor, Programa de

-The floral biology of three weeds, Ipomoea cairica, I. grandifolia and I. nil (Convolvulaceae), was studied in Botucatu and Jaboticabal, São Paulo, in southeastern Brazil. The three species are melittophilous, with a varied set of floral visitors, but with some overlapping. Cluster analysis using Jacquard similarity index indicated a greater similarity among different plant species in the same locality than among the populations at different places, in relation to floral visitor sets. The promiscuous and opportunistic features of the flowers were shown, with such type of adaptation to pollination being advantageous to weeds since pollinator availability is unpredictable at ruderal environments.Keywords: pollination, bees, morning-glory. RESUMO -A biologia floral de

The Cerrado (Brazilian savanna) has suffered massive destruction in recent years, mainly due to the expansion of agricultural areas. Many remnants of this vegetation are still poorly studied. Therefore, the purpose of this study was to carry out a floristic survey in a remnant of Cerrado in the municipality of Pratânia, central-west region of state of São Paulo, southeastern Brazil. In total, 120 species (38 families, 88 genera) were registered. The families with greater richness were: Fabaceae (23 species), Asteraceae (15), Myrtaceae (10), Malpighiaceae and Rubiaceae (seven each) and Bignoniaceae (five). The shrub component was predominant in the study area representing 37.5 % of the recorded species. A comparison among eight Cerrado areas showed greater similarity between areas with similar altitude.

Palavras chave: biologia, nutrição mineral, planta daninha, carbono, C/N. ABSTRACT Contents of macronutrients and micronutrients and CN relation of several weed species

Com o objetivo de avaliar os efeitos do método de preparo do solo e do controle de plantas daninhas em resteva de aveia preta (Avena strigosa), na cultura da soja (Glycine max cv. 'IAC 14'), foi conduzido um experimento de campo na Fazenda Experimental Lageado -UNESPBotucatu -SP, em 1993/94. Os tratamentos de manejo do solo foram Plantio Direto e Plantio Convencional (preparado com uma aração e três gradagens). As formas de controle de plantas daninhas estudadas corresponderam a uma testemunha sem controle do mato; controle com uso exclusivo de herbicidas aplicados em pré-emergência (0,28 kg/ha de metribuzim + 1,29 kg/ha de orizalin); controle com uso exclusivo de herbicidas aplicados em pós-emergência (0,25 kg/ha de fluazifop-p-butil + 0,25 kg/ha de fomesafen); controle com o uso conjunto dos tratamentos em pré e pós-emergência mencionados. Tanto no plantio direto quanto no convencional, utilizou-se glyphosate para a eliminação da aveia preta e das plantas daninhas antes da implantação da cultura. O delineamento experimental adotado foi de blocos ao acaso em parcelas subdivididas, com quatro repetições.

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