9 research outputs found

    INFLUÊNCIA DO ANELAMENTO E ESTIOLAMENTO DE RAMOS NA PROPAGAÇÃO DA LARANJEIRA VALÊNCIA (Citrus sinensis Osbeck) ATRAVÉS DE ESTACAS

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    Objetivando estudar a influĂȘncia do condicionamento de ramos, atravĂ©s do anelamento e estiolamento parcial, sobre o enraizamento de estacas de laranjeira cv. ValĂȘncia, conduziu-se o experimento no perĂ­odo de fevereiro a dezembro de 1993. Para o anelamento foi utilizado arame fino de cobre com o qual provocou-se um estrangulamento na base do ramo. No estiolamento, utilizou-se fita preta de polietileno, que foi enrolada na base das brotaçÔes. De cada ramo condicionado, obteve-se apenas uma estaca com 15 cm de comprimento, diĂąmetro mĂ©dio de 0,5 cm e um par de folhas apicais, cortadas pela metade. O plantio das estacas foi realizado em 12.04.93, em substrato de areia lavada e peneirada. Adotou-se o delineamento inteiramente casualizado, em esquema fatorial 3x3, resultante das combinaçÔes entre os perĂ­odos de zero, 30 e 60 dias dos fatores anelamento e estiolamento. Verificou-se que nĂŁo ocorreu enraizamento nas estacas que permaneceram trĂȘs meses no substrato e variou de 0 atĂ© 26,04% para aquelas que permaneceram oito meses. O perĂ­odo de estiolamento influenciou significativamente o percentual de estacas enraizadas.<br>With the aim of studying the effect of branch conditioning through girdling and banding on ValĂȘncia orange cuttings a rooting trial was carried out from February to December of 1993. The girdling was performed with a thin cooper wire tightly tied at the branch base reaching the log, and the banding with black poliethylene tape, covering the branch at the base of the sprouts. Each conditioned branch gave one cutting of 15 cm length, 0.5 cm diameter and a pair of half cut apical leaves. Cuttings were planted on Dec.04, 93, in washed and sieved sand substrate. The experimental design was completely randomized, with a factorial 3 x 3 from 0, 30 and 60 day periods, girdling and banding. There was no rooting in cuttings that remained three months in the substrate and there was up to 26.04% rooting for those ones that lasted for eight months in the substrate. The banding period significantly affected the cuttings rooting percentage

    Tabelas de fertilidade e de esperança de vida de Tynacantha marginata Dallas (Heteroptera, Pentatomidae, Asopinae) alimentado com larvas de Tenebrio molitor L. (Coleoptera, Tenebrionidae) e folhas de Eucalyptus urophylla S.T. Blake Life and fecundity tables of the predator Tynacantha marginata Dallas (Heteroptera, Pentatomidae) reared with Tenebrio molitor L. larvae (Coleoptera, Tenebrionidae) and Eucalyptus urophylla S.T. Blake leaves

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    <abstract language="eng">The objective of this research was to study the effect of feeding on Eucalyptus leaves on the life and fecundity tables of Tynacantha marginata Dallas, 1851 (Heteroptera: Pentatomidae). Higher mortality of this predator occurred during second week of life, when the nymphs were starting second instar. The fecundity table showed that the nymphal period of T. marginata lasted four weeks, with viability of 57,9% and total longevity of 21 weeks. Egg oviposition period took 10 weeks. The population parameters (R0, rm and &#955;) showed a 50.69 times populational increase after one generation
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