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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avaliação de extratos vegetais no controle da lagarta-da-soja (anticarsia gemmatalis) hübner, 1818 (lepidoptera: noctuidae) sob diferentes pressões populacionais a campo / Evaluation of vegetation stratum on the control of anticarsia gemmatalis hübner, 1818 (lepidoptera: noctuidae) on different population presure in a tilling

Schlüter, Mônia de Almeida 21 February 2006 (has links)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Aiming the discovering of new products with less impact to the environment, there were made experiments aiming to evaluate the efficiency on control, as well as the feeding inibit result on soya caterpillar (Anticarsia gemmatalis).with different vegetation stratum in different commercial soya tillings in Uruguaiana and Santa Maria (RS), from january to March, 2005 under low, medium and high population pressure. There were evaluate nim oil at 5%, watered stratum of cinamomum at 1/6 (p/v), distilled of Timbó 1/1 (v/v), distilled of araticum 1/1 (v/v) standart treatment (permetrina), dosage of 0,05 L ha-1 and testifying treatment (water). In all the treatments adherent spreading at 0,1% was used. The doses were applied at tilling, of soya plants and there was noticed that the concentrations experienced had some insecticide activity on Anticasia gemmatalis causing high mortality. The mortality changes with the use of the different stratum grub state of the insect, population pressure and weather conditions of the place. There was noticed that the leaf eat away by caterpillars under the effect of stratum tested was little when compared with, those of tistiled treatment, even when made on high population pressure. / Objetivando a descoberta de novos produtos que sejam menos impactantes ao meio ambiente, foram conduzidos experimentos com o objetivo de avaliar a eficiência de controle de Anticarsia gemmatalis e nível de dano, em diferentes lavouras comerciais de soja, nos municípios de Uruguaiana e Santa Maria (RS), no período de janeiro a março de 2005 sob pressão populacional baixa, média e alta. Foram avaliados o óleo de nim a 5%, extrato aquoso de cinamomo 1/6 (p/v), destilado de timbó 1/1 (v/v), destilado de araticum 1/1 (v/v), tratamento padrão (permetrina), na dose de 0,05L ha-1 e tratamento testemunha (água). Em todos os tratamentos utilizou-se espalhante adesivo 0,1%. As doses foram aplicadas a campo, sobre as plantas de soja, e verificou-se que as concentrações testadas exerceram acentuada atividade inseticida sobre A. gemmatalis, provocando elevada mortalidade, porém, esta variou de acordo com o extrato testado, estádio larval do inseto, pressão populacional e condições meteorológicas do local. Verificou-se que o consumo foliar por lagartas submetidas à ação dos extratos testados foi reduzido, quando comparados àquelas do tratamento testemunha, mesmo quando realizado sob pressão populacional alta.

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